AeroElectric-List Digest Archive

Mon 08/10/09


Total Messages Posted: 27



Today's Message Index:
----------------------
 
     1. 02:32 AM - Calibrating fuel qty gauges (Thruster87)
     2. 04:35 AM - Re: Re: WAY off topic.  (Bill Bradburry)
     3. 06:25 AM - Re: Radio Noise (Jeff Page)
     4. 06:40 AM - Re: Re: WAY off topic.  (BobsV35B@aol.com)
     5. 06:55 AM - Re: Calibrating fuel qty gauges (paul wilson)
     6. 06:55 AM - Re: Re: WAY off topic.  (Robert L. Nuckolls, III)
     7. 07:24 AM - Re: Re: Radio Noise (Roger)
     8. 07:52 AM - Re: Re: WAY off topic.  (BobsV35B@aol.com)
     9. 07:59 AM - Re: Re: WAY off topic.  (Robert L. Nuckolls, III)
    10. 08:30 AM - Re: Calibrating fuel qty gauges (Robert L. Nuckolls, III)
    11. 10:48 AM - Pitot heaters . . . warn or not, that IS the question (Robert L. Nuckolls, III)
    12. 10:58 AM - KLN 89B / 94 question (stephen coffey)
    13. 11:19 AM - Re: Check this out (Hinde, Frank George (Corvallis))
    14. 01:18 PM - overvoltage problem (Gary Thomas)
    15. 01:55 PM - Re: AeroElectric-List Digest: 16 Msgs - 08/08/09 (Gautier, Thomas N (3266))
    16. 02:16 PM - Re: Re: Radio Noise (Kelly McMullen)
    17. 02:19 PM - Re: Pitot heaters . . . warn or not, that IS the question (BobsV35B@aol.com)
    18. 02:41 PM - Re: Check this out (LarryMcFarland)
    19. 02:53 PM - Re: Check this out (Ernest Christley)
    20. 02:54 PM - Re: Check this out (Ernest Christley)
    21. 08:03 PM - Re: Check this out (Robert L. Nuckolls, III)
    22. 08:19 PM - Re: Check this out (Michael Pereira)
    23. 08:20 PM - Re: Check this out (Michael Pereira)
    24. 08:47 PM - music input to intercom (Don McIntosh)
    25. 10:09 PM - Re: Icom A-210 intercom (Thruster87)
    26. 10:20 PM - Re: Check this out (Matt Prather)
    27. 10:20 PM - Re: music input to intercom (Vern Little)
 
 
 


Message 1


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    Time: 02:32:30 AM PST US
    Subject: Calibrating fuel qty gauges
    From: "Thruster87" <alania@optusnet.com.au>
    How do you calibrate fuel qty using a 10 - 75 ohm sender unit with a 0 -90 ohm fuel gauge? in other words what's the best why to get the gauges to read accurately near empty, which is more important then FULL. Thanks Read this topic online here: http://forums.matronics.com/viewtopic.php?p=256888#256888


    Message 2


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    Time: 04:35:20 AM PST US
    From: "Bill Bradburry" <bbradburry@bellsouth.net>
    Subject: re: WAY off topic.
    Old Bob, I think the street is Goodview and the property you describe is a church.. Bill B _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Monday, August 10, 2009 12:59 AM Subject: Re: AeroElectric-List: re: WAY off topic. Good Evening Once again Bob, As near as I can tell the photo you provided is from the east looking west and you were paralleling North Cedar Street. Your property appears to be between Rosarian Avenue and Curry Lane with North Cedar Street on the west and Good? Street on the East. What happened to all of the industrial buildings to the east? Happy Skies, Old Bob Do Not Archive. In a message dated 8/9/2009 9:36:18 P.M. Central Daylight Time, nuckolls.bob@aeroelectric.com writes: At 03:49 PM 8/9/2009, you wrote: Good Afternoon 'Lectric Bob, Way off topic, but I was wondering what your address is in Medicine Lodge? Just wanted to check it out on Google Earth. Nothing but idle curiosity! Happy Skies, Old Bob 209 Curry Lane http://aeroelectric.com/Pictures/Misc/209_Curry_Lane.jpg Took this picture about 30 years ago from a Sundowner. We've got fewer trees now but the ones we have are much larger. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) --------------------------------------- =================================== List href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matro nics.com/Navigator?AeroElectric-List =================================== ms.matronics.com/">http://forums.matronics.com =================================== tp://www.matronics.com/contribution">http://www.matronics.com/contribution =================================== _____


    Message 3


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    Time: 06:25:50 AM PST US
    From: "Jeff Page" <jpx@Qenesis.com>
    Subject: Re: Radio Noise
    } I think your friend suffers from what I consider to be the most common cause } of dissatisfaction with VHF COMM performance in OBAM aircraft... unrealistic } expectations! Unfortunately the situation is more annoying than that. There is usually difficulty talking with the tower. Sometimes it is bad enough that clearance has been denied. This is very inconvenient since it is the home base of this aircraft :-( > What, if any other accessories are operating on the > airplane during this test. Try pulling all other breakers/ > fuses except radio/audio system to search out possible > cause/effect on board the aircraft. In particular, make > sure the alternator's regulator is not powered up. There is little else electrical in the aircraft. We tried turning off the transponder. There are no lights, fuel pump or even turn coordinator. Switching off the alternator should also power off the regulator. > Does the noise go away when you disconnect the antenna? > Have you checked for presence of this noise while away > from the field? The directional effects suggest possible > local source on the ground. The noise and the receive audio continue identically, not even a click as the antenna is connected and disconnected. This baffles me. The noise persists away from the airport. When calling up the tower from 10 miles out it is difficult to understand the controller. Sometimes the controller also has trouble understanding the transmissions from the aircraft. Changing the direction of the aircraft sometimes helps. > This is one of Ed King's earliest crystal synthesized radios > that came out about 1975 as I recall. Have you checked to see > if this radio still qualifies under tightened frequency > accuracy and receiver bandwidth requirements were levied for > 8.33 Khz channel spacing? The radio is 25KHz spacing, according to the little brochure that suffices as the operation manual. > Also, check performance at the top end of the comm frequency range with > a remotely located hand held for weak signal. See if the problem is > frequency sensitive. Ground is 118.40, Tower is 120.10 and the ATIS is 125.67. I haven't tried anything at the top end, but hopefully will get a chance to do so this week when I check the antenna cables and antenna by patching in a handheld. Thanks ! Jeff Page Dream Aircraft Tundra #10


    Message 4


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    Time: 06:40:21 AM PST US
    From: BobsV35B@aol.com
    Subject: Re: re: WAY off topic.
    Good Morning Bill, Goodview sounds good to me, but the buildings, church or industrial, that Bob shows in his thirty year old photo no longer seem to be there unless I am looking at the wrong location! Happy Skies, Old Bob Do Not Archive In a message dated 8/10/2009 6:37:17 A.M. Central Daylight Time, bbradburry@bellsouth.net writes: Old Bob, I think the street is Goodview and the property you describe is a church . Bill B ____________________________________ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of BobsV35 B@aol.com Sent: Monday, August 10, 2009 12:59 AM Subject: Re: AeroElectric-List: re: WAY off topic. Good Evening Once again Bob, As near as I can tell the photo you provided is from the east looking wes t and you were paralleling North Cedar Street. Your property appears to be between Rosarian Avenue and Curry Lane with North Cedar Street on the west and Good? Street on the East. What happened to all of the industrial buildings to the east? Happy Skies, Old Bob Do Not Archive. In a message dated 8/9/2009 9:36:18 P.M. Central Daylight Time, nuckolls.bob@aeroelectric.com writes: At 03:49 PM 8/9/2009, you wrote: Good Afternoon 'Lectric Bob, Way off topic, but I was wondering what your address is in Medicine Lodge ? Just wanted to check it out on Google Earth. Nothing but idle curiosity! Happy Skies, Old Bob 209 Curry Lane _http://aeroelectric.com/Pictures/Misc/209_Curry_Lane.jpg _ (http://aeroelectric.com/Pictures/Misc/209_Curry_Lane.jpg) Took this picture about 30 years ago from a Sundowner. We've got fewer trees now but the ones we have are much larger. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) --------------------------------------- ======================== =========== List href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.m atronics.com/Navigator?AeroElectric-List ======================== =========== ms.matronics.com/">http://forums.matronics.com ======================== =========== tp://www.matronics.com/contribution">http://www.matronics.com/contribution ======================== =========== ____________________________________ http://www.matronics.com/Navigator?AeroElectric-List http://forums.matronics.com http://www.matronics.com/contribution ======================== ============ (http://www.matronics.com/Navigator?AeroElectric-List) ======================== ============ ======================== ============ (http://www.matronics.com/contribution) ======================== ============


    Message 5


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    Time: 06:55:16 AM PST US
    From: paul wilson <pwmac@sisna.com>
    Subject: Re: Calibrating fuel qty gauges
    Buy a Cruz Pro gauge and calibrate is evey 1 gallon at the low end. PW ========== At 03:29 AM 8/10/2009, you wrote: > >How do you calibrate fuel qty using a 10 - 75 ohm sender unit with >a 0 -90 ohm fuel gauge? in other words what's the best why to get >the gauges to read accurately near empty, which is more important >then FULL. Thanks > > >Read this topic online here: > >http://forums.matronics.com/viewtopic.php?p=256888#256888 > >


    Message 6


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    Time: 06:55:25 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: re: WAY off topic.
    At 11:34 PM 8/9/2009, you wrote: >Good Evening Bob, > >Thanks much! > >Looks like a great location but it appears that the local airport is >a bit under utilized. Yeah . . . I got my first airplane ride off that airport when I was about 4 or 5 years old. Dad got his ticket in a J-3 on the GI bill. They're making noises about a new airport for M.L. seems like there's some bundle of our grandchildren's money that's being handed out for some form of stimulus or another. Problem with current location is outcropping of gypsum laden dirt off north end of the runway that disqualifies it for an instrument approach. They're talking about a new facility somewhere southeast. Emacs! The town of Pixley blew away in a tornado about 1940 or so and was never rebuilt but it was never removed from the maps. Our house is the little red dot in the upper left corner. Maybe we can turn the old airport into an ultralight facility. Bob . . .


    Message 7


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    Time: 07:24:17 AM PST US
    From: "Roger" <mrspudandcompany@verizon.net>
    Subject: Re: Radio Noise
    ----- Original Message ----- From: "Jeff Page" <jpx@Qenesis.com> Sent: Monday, August 10, 2009 9:16 AM Subject: AeroElectric-List: Re: Radio Noise Jeff, I believe you said the radio was bench tested and found to be operational. If this is the case, then from your description of the problem, it appears that it is either the (1) antenna and/or cable, (2) power/ground wiring, or (3) mike/speaker wiring. If it is the antenna, you should be able to determine this by unpluging from the radio and hook up to a portable radio for test. If power/ground, this can be checked with a meter. (check the wiring diagram to make sure that there are connections to all power and ground points. Some devices have multiple power and ground wires) If it is mike/speaker connection, this can be caused by using an incorrect jack or miswiring, check carefully to see if jacks are the correct ones, are wired correctly, and are isolated from ground at the mounting point. Roger


    Message 8


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    Time: 07:52:06 AM PST US
    From: BobsV35B@aol.com
    Subject: Re: re: WAY off topic.
    Ok Bob! It appears that Google located your address to the east of where it really is. My current take is that the photo was taken from the north facing south and that your home is in the middle of the block. The buildings I questioned must be the hospital. While I still hate and mistrust computers, it is amazing what Google Earth can provide for us. The location at Pixley looks interesting. It even appears there might be a runway there already! Happy Skies, Old Bob Do Not Archive PS. My first solo was in a 1940 Franklin powered J-3 and one of my first flying jobs was instructing for the GI Bill program. Great memories! In a message dated 8/10/2009 8:57:43 A.M. Central Daylight Time, nuckolls.bob@aeroelectric.com writes: The town of Pixley blew away in a tornado about 1940 or so and was never rebuilt but it was never removed from the maps. Our house is the little red dot in the upper left corner. Maybe we can turn the old airport into an ultralight facility. Bob . . .


    Message 9


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    Time: 07:59:20 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: re: WAY off topic.
    At 11:59 PM 8/9/2009, you wrote: >Good Evening Once again Bob, > >As near as I can tell the photo you provided is from the east >looking west and you were paralleling North Cedar Street. Your >property appears to be between Rosarian Avenue and Curry Lane with >North Cedar Street on the west and Good? Street on the East. What >happened to all of the industrial buildings to the east? . . . no. The top of the photo is south. The building to the southwest is the hospital where dad and mom spent their last days. That hospital was built when I was in the second grade. I think my sister was either #1 or #2 patient when she developed a high fever. The street in front of the hospital is Walnut. The houses to our east face Cedar. The only large buildings close to that intersection will be the hospital in our back yard and the catholic church about 1.5 blocks to n.e. Google doesn't have our location right, we're up the hill between Cedar and Walnut. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------


    Message 10


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    Time: 08:30:22 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Calibrating fuel qty gauges
    At 04:29 AM 8/10/2009, you wrote: > >How do you calibrate fuel qty using a 10 - 75 ohm sender unit with >a 0 -90 ohm fuel gauge? in other words what's the best why to get >the gauges to read accurately near empty, which is more important >then FULL. Thanks The floats-on-a-swing-arm senders are a legacy product from cars and other vehicles that go back a very long way. Making these things really accurate in more\ than one place is a bit fussy. Years ago, we crafted an electronic signal conditioning board for the Bonanzas and Barons that allowed dead-on calibration of empty and full. All other readings across the scale simply fell where where the physics of the sender dictates. The physics of these devices are affected mildly by linearity of the wire wound sensor resistor (usually within 5% of true) but a whole lot by trigonometry of the swing arm and tank geometry. But as you've already recognized, the one level you really want to be accurate is the empty point. For this you can do some things with series calibration resistors and/or bending the float arm on the sender. This CAN be a tedious, trial-by-error activity. If it were my airplane, I'd probably craft a microprocessor based signal conditioner that would allow me to take readings at 5% increments from empty to full and generate a lookup table that converts as-installed sender (transducer) readings into real numbers. The BEST way to watch full levels is with installation of a "dip stick" style sensor at the low fuel warning level (generally 1/4 to 1/3 tank). Consider devices like this: Emacs! One of these stuck through the tank wall at the warning level will light a lamp on the panel at the desired fuel quantity with no risk for drift of calibration. See: http://www.gemssensors.com/content.aspx?id=282 This is the no-brainer, dead-nuts accurate low liquid lever sensing method I know of. Capacity fuel gages with processor augmentation are also easy to calibrate . . . but I think I could get by with no active fuel gaging other than a set of optical level detectors cited above. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------


    Message 11


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    Time: 10:48:01 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Pitot heaters . . . warn or not, that IS the question
    At 12:13 PM 8/8/2009, you wrote: Bob.. The reason I asked is that I was looking at the events surrounding Air France AF447 (A330) in mid atlantic. I saw that AF and Airbus have been dinking around with pitot tubes, and have been through three types (Rosemount, Goodrich, Thales C16195AA so far, and were about to install the fourth type (Thales C16195BA) just before the accident. I was trying to envisage what can go wrong with a pitot tube...it's a brutally simple device, and I came up with three scenarios: 1...Physical damage (Hail, catering trucks). 2...Insufficient heating. 3...Defective heaters. As far as I can tell, there is no attempt made to monitor heater performance, either by monitoring input power or by measuring temperature., so I wondered if heating could be simply inadequate. I came up blank when I tried to research the actual heater wattages. Heating is almost never "inadequate" to the design goals in place when the tube is originally installed and qualified on that airplane. Problem is that design goals and mother nature's ability to paste your airplane with a layer of ice are not necessarily in synch. Incidentally...I believe that the primary causative factor was the crew's decision (or non-decision??) to continue their planned flight path despite the fact that it went directly through a monster thunderstorm. The thing that is open to conjecture is the sequence of events after that. Hmmmm . . . The idea that an airplane becomes at risk for unplanned arrival with the earth because IAS/TAS values are suddenly "unknown" is a bit of a stretch. But this assumes that some automatic flight control system doesn't react and starts fiddling with the airplane's configuration. In the case I worked, the manufacturer wrote some specific procedures for flying based on AOA in the rare cases that airspeed becomes available. In any case, there was no known risk that the event would occur during approach to landing but even then, a landing using AOA and windage corrected, GPS ground speed was quite possible and practical. If the heater is drawing current, then it's working as designed. The Hawker-Beechcraft products nearly all feature some form of heater current detection to drive a light. This is spelled out as a requirement in paragraph 1326 of both FAR Part 23 and Part 25 ---------------------- Sec. 23.1326 Pitot heat indication systems. If a flight instrument pitot heating system is installed to meet the requirements specified in Sec. 23.1323(d), an indication system must be provided to indicate to the flight crew when that pitot heating system is not operating. The indication system must comply with the following requirements: (a) The indication provided must incorporate an amber light that is in clear view of a flightcrew member. (b) The indication provided must be designed to alert the flight crew if either of the following conditions exist: (1) The pitot heating system is switched "off." (2) The pitot heating system is switched "on" and any pitot tube heating element is inoperative. [Amdt. 23-49, 61 FR 5169, Feb. 9, 1996] ---------------------- If you'd like to include a similar system in your heated pitot planning see: http://www.aeroelectric.com/articles/Failure_Detection_and_Annunciation.pdf Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------


    Message 12


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    Time: 10:58:30 AM PST US
    Subject: KLN 89B / 94 question
    From: stephen coffey <n6812t@gmail.com>
    Good morning, all. I am almost done with the wiring harness for my avionics. It is down to the last two connections for the GPSAPR/ARM/ACTV annunciator. The install data is decent, but missing clear references to a couple of connections. Imagine that. I'm hoping someone here has done it before. On this annunciator, there are 4 inputs: ARM Annunciate. This has a clear match on pin 17 of connector 891. No problem. ACTV annunciate. Same, but pin 18. No problem. GPS APPR annunciate. There is NO connection listed anywhere in the documentation for this. Anybody done it before? Finally, there is the lighting. I'm 14V, so there is an input on the KLN for 14V undimmed, which tells the GPS to dim. That part is easy. That "dimmer" unit also needs some sort of bilevel output for the annunciators, since the KLN itself doesn't have one. Any ideas? Thanks in advance. Stephen


    Message 13


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    Time: 11:19:53 AM PST US
    From: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
    Subject: Check this out
    Paid for houses and no debt..What a concept..and one I reached about 7 years ago..biggest relief of my life was to make that final mortgage payment! Frank 2 airplanes, one house and numerous skills applied to the benefit of others Do not archive -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Friday, August 07, 2009 12:09 PM Subject: RE: AeroElectric-List: Check this out --> <nuckolls.bob@aeroelectric.com> At 11:45 AM 8/7/2009, you wrote: >--> <terry@tcwatson.com> > >My suggestion about a very large contributing factor to this problem is >that so few of us are raised on a farm or ranch anymore. Any farm kid >learns that if something needs doing, you need to be able to do it; >when something breaks, you need to be able to fix it.


    Message 14


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    Time: 01:18:59 PM PST US
    From: Gary Thomas <garythomas8708@yahoo.com>
    Subject: overvoltage problem
    All, - I have a 601XL/Corvair with the standard William Wynne configuration.- I have the John Deere alternator and regulator plus the PMOV overvoltage unit from B&C.- I feel confident that I have it wired correctly since I would get 12V when I switched on the master, and then 14V when I switched on the alternator and started the engine.- Recently I noticed my battery had a low charge, and the voltmeter showed a flat 12V, even with the engine runni ng. I had the battery recharged and load tested (it was fine), and I tested the alternator (around 40V ac on the two wires that lead to the regulator).- The two wires that came out of the regulator and connected to the B&C capa citor were showing just 0.05V or so when I connected each of them separatel y through a voltmeter to a ground.-Clearly a problem. So I bypassed the entire overvoltage setup and connected these tabs dirrect ly to the system bus.- Now I get 14V when the engine is running. I am at a loss to figure out where the problem is.- I believe it must be somewhere in the B&C overvoltage system, but don't know where.- Fuses are all ok. - Any ideas? - Gary


    Message 15


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    Time: 01:55:16 PM PST US
    From: "Gautier, Thomas N (3266)" <thomas.n.gautier@jpl.nasa.gov>
    Subject: Re: AeroElectric-List Digest: 16 Msgs - 08/08/09
    The Pythagorean theorem says that the line of sight distance between you and the horizon is D = sqrt(h^2 + 2hR) Where h is your height above the ground and R is the radius of the Earth. This assumes that the Earth is a perfect sphere and there are no mountains or other stuff between you and the horizon. It's also the direct line of sight, not distance over the ground (but close enough at the heights we fly). Note that h, R and D all have the same units (feet, km, nm, etc). Write this another way: D = sqrt(h) * sqrt(h+2R) So, to a good approximation: D = sqrt(h) * sqrt(2R) since h is generally puny compared to R = 3963 miles. This gives the formula D = 89.03 sqrt(h) miles, if h is in miles or D = 1.225 sqrt(h) miles, if h is in feet. Nick Gautier RV-10 fuselage > > > Time: 08:21:31 AM PST US > From: "z747pilot" <z747pilot@verizon.net> > Subject: RE: AeroElectric-List: Radio noises > > Hey Flyers, > > A small formula here that may help you out: take the Square root of the > antennea hight (aircraft hight) and multiply it by 2.23 and this should give > you a rough idea of your VHF range. > > Regards, > > z747pilot >


    Message 16


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    Time: 02:16:03 PM PST US
    From: Kelly McMullen <kellym@aviating.com>
    Subject: Re: Radio Noise
    Two suggestions. If possible, find another aircraft with same model radio, that you can swap yours into, and see how it performs. Check your antenna cable thoroughly, substitute another cable and antenna if possible. I had similar problems with old antenna cable that turned out to have a cold solder joint for the shield on the radio end, allowing lots of RF to leak back into the radio. New cable, problem gone. If the radio has been bench checked with no problems, then the problem has to be between the radio and the antenna, likely bad connection or no connection. One last long shot...turn coordinator or turn and bank are normally wired directly to main bus to be always powered. If it has a noisy motor, theoretically could be source even though nothing else is turned on. Jeff Page wrote: > > } I think your friend suffers from what I consider to be the most common > cause > } of dissatisfaction with VHF COMM performance in OBAM aircraft... > unrealistic > } expectations! > > Unfortunately the situation is more annoying than that. There is usually > difficulty talking with the tower. Sometimes it is bad enough that > clearance > has been denied. This is very inconvenient since it is the home base of > this > aircraft :-( > >> What, if any other accessories are operating on the >> airplane during this test. Try pulling all other breakers/ >> fuses except radio/audio system to search out possible >> cause/effect on board the aircraft. In particular, make >> sure the alternator's regulator is not powered up. > > There is little else electrical in the aircraft. We tried turning off the > transponder. There are no lights, fuel pump or even turn coordinator. > Switching off the alternator should also power off the regulator. > >> Does the noise go away when you disconnect the antenna? >> Have you checked for presence of this noise while away >> from the field? The directional effects suggest possible >> local source on the ground. > > The noise and the receive audio continue identically, not even a click as > the antenna is connected and disconnected. This baffles me. > > The noise persists away from the airport. When calling up the tower from > 10 miles out it is difficult to understand the controller. Sometimes the > controller also has trouble understanding the transmissions from the > aircraft. > Changing the direction of the aircraft sometimes helps. > >> This is one of Ed King's earliest crystal synthesized radios >> that came out about 1975 as I recall. Have you checked to see >> if this radio still qualifies under tightened frequency >> accuracy and receiver bandwidth requirements were levied for >> 8.33 Khz channel spacing? > > The radio is 25KHz spacing, according to the little brochure that suffices > as the operation manual. > >> Also, check performance at the top end of the comm frequency range with >> a remotely located hand held for weak signal. See if the problem is >> frequency sensitive. > > Ground is 118.40, Tower is 120.10 and the ATIS is 125.67. > I haven't tried anything at the top end, but hopefully will get a chance > to do so this week when I check the antenna cables and antenna by patching > in a handheld. > > Thanks ! > > Jeff Page > Dream Aircraft Tundra #10 > > > > >


    Message 17


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    Time: 02:19:13 PM PST US
    From: BobsV35B@aol.com
    Subject: Re: Pitot heaters . . . warn or not, that IS the question
    Good Afternoon All, The following passage was in a message to which 'Lectric Bob responded, but I was not able to discern the author. "Incidentally...I believe that the primary causative factor was the crew's decision (or non-decision??) to continue their planned flight path despite the fact that it went directly through a monster thunderstorm. The thing that is open to conjecture is the sequence of events after that." I wish to respectfully disagree. Staying out of severe weather is always a good idea, but airplanes have been flying successfully through such extreme storms as long as we have been flying IFR. As long as the crew has adequate instrumentation and the requisite skills to use it the airplane will hang together. Back before we had as much deviation capability, airplanes were accidentally flown through extreme hurricanes and even tornados. Some of the airplanes needed serious repair following those excursions, but they did bring their payload safely back to mother earth. It is certainly wise to avoid those conditions, but the airplane will handle it adequately even though it may be damaged and the passengers most assuredly would not have a very pleasant ride. I think you will find an effort by the applicable certification entities to blame the crew for flight where they should not have been, but I think the true story is that the crew either did not have the required instrumentation available to them or that they were not properly trained in the use of what was available. Blaming the weather is a cop out to avoid design or training responsibility. Happy Skies, Old Bob AKA Bob Siegfried Stearman N3977A LL22 Downers Grove, Illinois


    Message 18


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    Time: 02:41:34 PM PST US
    From: LarryMcFarland <larry@macsmachine.com>
    Subject: Re: Check this out
    Attaboy Frank, The most powerful stroke one can make is to become debt free. Lee and I worked 3 jobs and ran a business for 15 years. I had no holidays off worked all the shutdowns with contractors attended night school and designed material handling facilities during the day. We were debt free in 1978 and stayed that way. It's the shortest distance to care free living and our blessed retirement of 5 years now. Thinking what might be worth building next. Larry McFarland 601HDS at www.macsmachine.com do not archive Hinde, Frank George (Corvallis) wrote: > > Paid for houses and no debt..What a concept..and one I reached about 7 years ago..biggest relief of my life was to make that final mortgage payment! > > Frank > 2 airplanes, one house and numerous skills applied to the benefit of others > > Do not archive > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III > Sent: Friday, August 07, 2009 12:09 PM > To: aeroelectric-list@matronics.com > Subject: RE: AeroElectric-List: Check this out > > --> <nuckolls.bob@aeroelectric.com> > > At 11:45 AM 8/7/2009, you wrote: > >> --> <terry@tcwatson.com> >> >> My suggestion about a very large contributing factor to this problem is >> that so few of us are raised on a farm or ranch anymore. Any farm kid >> learns that if something needs doing, you need to be able to do it; >> >


    Message 19


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    Time: 02:53:31 PM PST US
    From: Ernest Christley <echristley@nc.rr.com>
    Subject: Re: Check this out
    Terry Watson wrote: > > I will confess to a strong possibility of prejudice based on my own > experience growing up on a farm, but I don't understand the use of the word > "orthogonal" in this context. Orthogonal. The phenomena don't lie along the same line, although they do cross. Being on a farm doesn't really drive inventiveness or the tinkerer spirit; however, being on a farm often means that you need more than you have. I wouldn't buy my son a car when he turned 16. I could have, but I wouldn't. Made him go buy what he could afford with money he earned himself. Turned out to be a clunker (go figure). He drove it a year before burning the clutch out and then letting it sit for several months while he slowly figured out that he could fix it or walk. My son is probably the only one in his graduating class that can pull an engine to replace a clutch. The boy still couldn't slop a hog, but he is much closer than before to the attitude that would get his feet muddy. > I understand and agree that growing up poor is > a strong motivation to do things for ones self. I did run across an > interesting book that I think is on the very subject Bob was talking about. > I downloaded and read the free sample on my Kindle and will probably buy and > read the book. As an aside, I have discovered the book reviews on Amazon.com > to be a fascinating source of discovery. It's a little like wandering > through a library and sampling books, but all from your own computer and > with in many cases dozens of thoughtful reviews of the book. This particular > book is SHOP CLASS AS SOULCRAFT by Matthew B. Crawford. I think Bob in > particular would find it pertinent to his ideas. The link to the book is: > http://tinyurl.com/nrybq5 > > Terry > > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ernest > Christley > Sent: Saturday, August 08, 2009 12:47 PM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: Check this out > > <echristley@nc.rr.com> > > Terry Watson wrote: > >> > <terry@tcwatson.com> > >> My suggestion about a very large contributing factor to this problem is >> > that > >> so few of us are raised on a farm or ranch anymore. Any farm kid learns >> > that > >> if something needs doing, you need to be able to do it; when something >> breaks, you need to be able to fix it. To eat, you need to plant seeds and >> assure their growth, or to be willing to slaughter an animal you have >> > known > >> all its life. I don't know how you translate this into an urban lifestyle >> where we may be many layers away from the source of what we want or need, >> but it's a great loss if we can't do it. Maybe it's just teaching kids the >> joy of working with their head AND their hands at the same time, or the >> satisfaction of playing with or living in or riding in or flying in >> something they built with their own hands. >> >> > Nawh, living on a farm is orthogonal. A child just has to grow up > without being handed everything he wants. He has to learn to WANT > things. Then he has to learn that things can be had from one's own hands. > > I grew up poor. Not Ethiopian starvation poor, but if I wanted a > bicycle I had to learn to build it from spare parts that I got from > castaways. I learned to build a bicycle from castaways. I'm no longer > poor by any reasonable definition, but I still can't afford a certified > airplane. If I want one, I have to learn to build it myself. We'll see > in a year or so what sort of student I am. > > -- Ernest Christley, President Ernest@TechnicalTakedown.com TechnicalTakedown, LLC www.TechnicalTakedown.com 101 Steep Bank Dr. Cary, NC 27518 (919) 741-9397


    Message 20


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    Time: 02:54:41 PM PST US
    From: Ernest Christley <echristley@nc.rr.com>
    Subject: Re: Check this out
    S. Ramirez wrote: > > What this says, Rick, is that once our business experts and leaders > realize that a great country cannot be great without manufacturing, > they will attempt to restart manufacturing, but we wont have > qualified machinists and other similar craftsman/tradesmen to do it. > We will have to import this technology and expertise, thus creating a > whole new problem. Its too bad that our present leaders were and are > trained in MBA schools to maximize this quarters bottom line and not > tomorrows. > > Simon Ramirez > > Copyright 2009 > Well, for the most part, those craftsmen were imported the first time. -- Ernest Christley, President Ernest@TechnicalTakedown.com TechnicalTakedown, LLC www.TechnicalTakedown.com 101 Steep Bank Dr. Cary, NC 27518 (919) 741-9397


    Message 21


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    Time: 08:03:22 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Check this out
    What this says, Rick, is that once our business experts and leaders realize that a great country cannot be great without manufacturing, they will attempt to restart manufacturing, but we won't have qualified machinists and other similar craftsman/tradesmen to do it. We will have to import this technology and expertise, thus creating a whole new problem. It's too bad that our present leaders were and are trained in MBA schools to maximize this quarter's bottom line and not tomorrow's. Well, for the most part, those craftsmen were imported the first time. Yes . . . but so were the consumers, entrepreneurs, science, manufacturing resources and individuals with creativity. It was communication (letters, books, news, ships) with the outside world that provided conduits of both information and willing/capable souls who perceived an opportunity. Wherein opportunity meant freedom of interference in the conduct of free-market bargains and protection of liberty. The older I get, the more I've come to realize that the most important ideas were embodied in the schools courses for which I had the least interest - history. This is largely because my teachers idea of useful historical knowledge consisted of remembering what people did what to whom and when. I understand now that the history of ideas is critical to success. It is insufficient to school the student in the specialties, hand them a room full of tools and expect a spontaneous flow of value-added activity. Folks like Kelly Johnson, Chas. Kettering, David Packard, John Fluke, et. als. were not just sharp dudes with an idea. They knew the history of their sphere of ideas. It's gong to be a much more difficult than to simply import warm bodies with the technical skills. Unless we re-create the environment under which our mentors germinated, grew and prospered, it won't matter how many techno-wiennies, or stone masons we import. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------


    Message 22


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    Time: 08:19:17 PM PST US
    Subject: Re: Check this out
    From: Michael Pereira <mjpereira68@gmail.com>
    On Sat, Aug 8, 2009 at 5:07 PM, S. Ramirez<simon@synchdes.com> wrote: > What this says, Rick, is that once our business experts and leaders realize > that a great country cannot be great without manufacturing, they will > attempt to restart manufacturing, but we wont have qualified machinists and > other similar craftsman/tradesmen to do it. We will have to import this > technology and expertise, thus creating a whole new problem. Its too bad > that our present leaders were and are trained in MBA schools to maximize > this quarters bottom line and not tomorrows. How about instead of smacking around Joe CEO that we modify our country's business environment ? You know, like reducing corporate taxation since our country has the highest corporate tax rate in the western world. Or maybe reining in the insane environmental regulations that allow non-involved 3rd parties to sue to prevent the building of any kind of industrial infrastructure (like nuke plants or oil refineries for example) for years to decades. Complain about corporate stupidity and bean counters all you want, but, reality is that any company that behaves differently will be put out of business by it's more efficiently operating competitors (or be put out of business by a nationalized company that no longer needs to heed efficiency at all; I still can't believe I have to say that in the United States). If you want different results we need to change the underlying fundamentals that are driving the corporate behaviors we all (including me) find annoying. Sorry for the political content. I do think being mechanically competent is important. But, with all the insanity going on in the US today I can't let certain kinds of rhetoric pass uncommented. And, now that Obama himself is telling me to shut up lest my neighbors report me, I'm super pissed on top of it (I don't mean pissed or even annoyed at Simon, my opinion just differs from his and Simon, as far as I know, isn't trying to oppress me *smirks*). c'ya, Sorry, Michael > > > Simon Ramirez > > Copyright 2009 > > > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Richard > Girard > Sent: Saturday, August 08, 2009 5:34 PM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: Check this out > > > When my son was in his high school in the suburbs of Seattle, Washington was > busy getting rid of all it's shop classes. When we complained, the school > principal replied that all kids would be educated to go to college and if > they wanted to get into trades they could go to an industrial arts school > afterward. This was when all the "experts" said we were going to be an > "information economy". Funny thing though, no one could ever answer my > question as to what that information would be? The latest "star"? The latest > trivia? We certainly wouldn't have any information about making things. And > now we don't make so much anymore. Maybe we can sell information about how > to ruin an economy by surrendering it to bankers and financiers. > > MHO. > > > Rick Girard > > do not archive > > On Sat, Aug 8, 2009 at 3:42 PM, Terry Watson <terry@tcwatson.com> wrote: > > > I will confess to a strong possibility of prejudice based on my own > > experience growing up on a farm, but I don't understand the use of the word > "orthogonal" in this context. I understand and agree that growing up poor is > a strong motivation to do things for ones self. I did run across an > interesting book that I think is on the very subject Bob was talking about. > I downloaded and read the free sample on my Kindle and will probably buy and > read the book. As an aside, I have discovered the book reviews on Amazon.com > to be a fascinating source of discovery. It's a little like wandering > through a library and sampling books, but all from your own computer and > with in many cases dozens of thoughtful reviews of the book. This particular > book is SHOP CLASS AS SOULCRAFT by Matthew B. Crawford. I think Bob in > particular would find it pertinent to his ideas. The link to the book is: > http://tinyurl.com/nrybq5 > > Terry > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ernest > Christley > Sent: Saturday, August 08, 2009 12:47 PM > To: aeroelectric-list@matronics.com > Subject: Re: AeroElectric-List: Check this out > > <echristley@nc.rr.com> > > Terry Watson wrote: > <terry@tcwatson.com> >> >> My suggestion about a very large contributing factor to this problem is > that >> so few of us are raised on a farm or ranch anymore. Any farm kid learns > that >> if something needs doing, you need to be able to do it; when something >> breaks, you need to be able to fix it. To eat, you need to plant seeds and >> assure their growth, or to be willing to slaughter an animal you have > known >> all its life. I don't know how you translate this into an urban lifestyle >> where we may be many layers away from the source of what we want or need, >> but it's a great loss if we can't do it. Maybe it's just teaching kids the >> joy of working with their head AND their hands at the same time, or the >> satisfaction of playing with or living in or riding in or flying in >> something they built with their own hands. >> > Nawh, living on a farm is orthogonal. A child just has to grow up > without being handed everything he wants. He has to learn to WANT > things. Then he has to learn that things can be had from one's own hands. > > I grew up poor. Not Ethiopian starvation poor, but if I wanted a > bicycle I had to learn to build it from spare parts that I got from > castaways. I learned to build a bicycle from castaways. I'm no longer > poor by any reasonable definition, but I still can't afford a certified > airplane. If I want one, I have to learn to build it myself. We'll see > in a year or so what sort of student I am. > > -- > Ernest Christley, President > Ernest@TechnicalTakedown.com > > TechnicalTakedown, LLC > www.TechnicalTakedown.com > 101 Steep Bank Dr. > Cary, NC 27518 > (919) 741-9397 > > > ========== > -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List > ========== > http://forums.matronics.com > ========== > le, List Admin. > ="_blank">http://www.matronics.com/contribution > ========== > > > http://www.matronics.com/Navigator?AeroElectric-List > > http://forums.matronics.com > > http://www.matronics.com/contribution > >


    Message 23


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    Time: 08:20:17 PM PST US
    Subject: Re: Check this out
    From: Michael Pereira <mjpereira68@gmail.com>
    Oh and I agree if conditions ever exist to make manufacturing desirable on the level it used to be in this country the companies would have a hard time filling jobs. The thing is, that will result in high wages which will have the follow on effect of people wanting to invest in learning those skills which will stimulate the construction of trade schools, ad infinitum. In a truly free market, the above problem isn't much of a problem unless the desire for increased manufacturing capacity is time sensitive because of an ongoing hot war. On Mon, Aug 10, 2009 at 8:04 PM, Michael Pereira<mjpereira68@gmail.com> wrote: > On Sat, Aug 8, 2009 at 5:07 PM, S. Ramirez<simon@synchdes.com> wrote: >> What this says, Rick, is that once our business experts and leaders realize >> that a great country cannot be great without manufacturing, they will >> attempt to restart manufacturing, but we wont have qualified machinists and >> other similar craftsman/tradesmen to do it. We will have to import this >> technology and expertise, thus creating a whole new problem. Its too bad >> that our present leaders were and are trained in MBA schools to maximize >> this quarters bottom line and not tomorrows. > > How about instead of smacking around Joe CEO that we modify our > country's business environment ? You know, like reducing corporate > taxation since our country has the highest corporate tax rate in the > western world. Or maybe reining in the insane environmental > regulations that allow non-involved 3rd parties to sue to prevent the > building of any kind of industrial infrastructure (like nuke plants or > oil refineries for example) for years to decades. > > Complain about corporate stupidity and bean counters all you want, > but, reality is that any company that behaves differently will be put > out of business by it's more efficiently operating competitors (or be > put out of business by a nationalized company that no longer needs to > heed efficiency at all; I still can't believe I have to say that in > the United States). > > If you want different results we need to change the underlying > fundamentals that are driving the corporate behaviors we all > (including me) find annoying. > > Sorry for the political content. I do think being mechanically > competent is important. > But, with all the insanity going on in the US today I can't let > certain kinds of rhetoric pass uncommented. And, now that Obama > himself is telling me to shut up lest my neighbors report me, I'm > super pissed on top of it (I don't mean pissed or even annoyed at > Simon, my opinion just differs from his and Simon, as far as I know, > isn't trying to oppress me *smirks*). > > c'ya, > Sorry, > Michael > > >> >> >> >> Simon Ramirez >> >> Copyright 2009 >> >> >> >> >> >> From: owner-aeroelectric-list-server@matronics.com >> [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Richard >> Girard >> Sent: Saturday, August 08, 2009 5:34 PM >> To: aeroelectric-list@matronics.com >> Subject: Re: AeroElectric-List: Check this out >> >> >> >> When my son was in his high school in the suburbs of Seattle, Washington was >> busy getting rid of all it's shop classes. When we complained, the school >> principal replied that all kids would be educated to go to college and if >> they wanted to get into trades they could go to an industrial arts school >> afterward. This was when all the "experts" said we were going to be an >> "information economy". Funny thing though, no one could ever answer my >> question as to what that information would be? The latest "star"? The latest >> trivia? We certainly wouldn't have any information about making things. And >> now we don't make so much anymore. Maybe we can sell information about how >> to ruin an economy by surrendering it to bankers and financiers. >> >> MHO. >> >> >> >> Rick Girard >> >> do not archive >> >> On Sat, Aug 8, 2009 at 3:42 PM, Terry Watson <terry@tcwatson.com> wrote: >> >> >> I will confess to a strong possibility of prejudice based on my own >> >> experience growing up on a farm, but I don't understand the use of the word >> "orthogonal" in this context. I understand and agree that growing up poor is >> a strong motivation to do things for ones self. I did run across an >> interesting book that I think is on the very subject Bob was talking about. >> I downloaded and read the free sample on my Kindle and will probably buy and >> read the book. As an aside, I have discovered the book reviews on Amazon.com >> to be a fascinating source of discovery. It's a little like wandering >> through a library and sampling books, but all from your own computer and >> with in many cases dozens of thoughtful reviews of the book. This particular >> book is SHOP CLASS AS SOULCRAFT by Matthew B. Crawford. I think Bob in >> particular would find it pertinent to his ideas. The link to the book is: >> http://tinyurl.com/nrybq5 >> >> Terry >> >> -----Original Message----- >> From: owner-aeroelectric-list-server@matronics.com >> [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ernest >> Christley >> Sent: Saturday, August 08, 2009 12:47 PM >> To: aeroelectric-list@matronics.com >> Subject: Re: AeroElectric-List: Check this out >> >> <echristley@nc.rr.com> >> >> Terry Watson wrote: >> <terry@tcwatson.com> >>> >>> My suggestion about a very large contributing factor to this problem is >> that >>> so few of us are raised on a farm or ranch anymore. Any farm kid learns >> that >>> if something needs doing, you need to be able to do it; when something >>> breaks, you need to be able to fix it. To eat, you need to plant seeds and >>> assure their growth, or to be willing to slaughter an animal you have >> known >>> all its life. I don't know how you translate this into an urban lifestyle >>> where we may be many layers away from the source of what we want or need, >>> but it's a great loss if we can't do it. Maybe it's just teaching kids the >>> joy of working with their head AND their hands at the same time, or the >>> satisfaction of playing with or living in or riding in or flying in >>> something they built with their own hands. >>> >> Nawh, living on a farm is orthogonal. A child just has to grow up >> without being handed everything he wants. He has to learn to WANT >> things. Then he has to learn that things can be had from one's own hands. >> >> I grew up poor. Not Ethiopian starvation poor, but if I wanted a >> bicycle I had to learn to build it from spare parts that I got from >> castaways. I learned to build a bicycle from castaways. I'm no longer >> poor by any reasonable definition, but I still can't afford a certified >> airplane. If I want one, I have to learn to build it myself. We'll see >> in a year or so what sort of student I am. >> >> -- >> Ernest Christley, President >> Ernest@TechnicalTakedown.com >> >> TechnicalTakedown, LLC >> www.TechnicalTakedown.com >> 101 Steep Bank Dr. >> Cary, NC 27518 >> (919) 741-9397 >> >> >> >> >> >> >> >> >> ========== >> -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List >> ========== >> http://forums.matronics.com >> ========== >> le, List Admin. >> ="_blank">http://www.matronics.com/contribution >> ========== >> >> >> >> >> >> >> >> >> http://www.matronics.com/Navigator?AeroElectric-List >> >> http://forums.matronics.com >> >> http://www.matronics.com/contribution >> >> >> >> >> >


    Message 24


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    Time: 08:47:31 PM PST US
    Subject: music input to intercom
    From: "Don McIntosh" <don@contractorsnorthwest.com>
    I finished the wiring harness for my PS 1000II, hooked it up and the intercom and radio both seem to work good. The music input...not so good. When I plugged in my Walkman (I know, I know, but my wife just gave it to me for my birthday, it isn't being changed soon!) even with everything turned all the way up, I could hardly hear the music. So I checked the circuit with the ohm meter between music hi and music low and I get half a circuit - not a full short, just half. I am using the shields for all the lo sides, connected them all together with pigtails and then to ground at the intercom. Any ideas? -------- Don McIntosh Kitfox Series 7 under construction Jabiru 3300 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=257079#257079


    Message 25


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    Time: 10:09:38 PM PST US
    Subject: Re: Icom A-210 intercom
    From: "Thruster87" <alania@optusnet.com.au>
    It's voodoo I tell you . I just switched on the A210 and the bloody intercom is working just fine now.Looks like it just needed a rest. Maybe it got a fright as I was just about to start cutting wires and installing a separate intercom [403] so thanks for all your help. cheers Alan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=257086#257086


    Message 26


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    Time: 10:20:31 PM PST US
    Subject: Re: Check this out
    From: "Matt Prather" <mprather@spro.net>
    > <mjpereira68@gmail.com> > > On Sat, Aug 8, 2009 at 5:07 PM, S. Ramirez<simon@synchdes.com> wrote: >> What this says, Rick, is that once our business experts and leaders snip >> that our present leaders were and are trained in MBA schools to maximize >> this quarters bottom line and not tomorrows. > > How about instead of smacking around Joe CEO that we modify our > country's business environment ? You know, like reducing corporate > taxation since our country has the highest corporate tax rate in the Our corporate tax rate encourages companies to make capital expenditures instead of report large profits. Businesses are quite able to decide whether they report a profit or not. They often give raises or bonuses which count as expenses against profits, adjusting the tax bill down. This leads to another noteworthy statistic - America CEO's are very highly compensated.. I'm not saying it's wrong, just that the tax rate is only part of the picture.. Matt-


    Message 27


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    Time: 10:20:31 PM PST US
    From: "Vern Little" <rv-9a-online@telus.net>
    Subject: Re: music input to intercom
    You have a stereo source feeding a monophonic input, so you need to combine the L and R channel outputs of your Walkman into the single channel input. Usually, a couple of resistors connected together will take care of this (150 ohms will work). It's best to use a stereo jack and wire the resistors to the back of it. One resistor to L, one to R and connect the free ends together to the mono input of the intercom (using the appropriate cable). Good Luck Vern Little www.vx-aviation.com ----- Original Message ----- From: "Don McIntosh" <don@contractorsnorthwest.com> Sent: Monday, August 10, 2009 8:41 PM Subject: AeroElectric-List: music input to intercom > <don@contractorsnorthwest.com> > > I finished the wiring harness for my PS 1000II, hooked it up and the > intercom and radio both seem to work good. The music input...not so good. > When I plugged in my Walkman (I know, I know, but my wife just gave it to > me for my birthday, it isn't being changed soon!) even with everything > turned all the way up, I could hardly hear the music. So I checked the > circuit with the ohm meter between music hi and music low and I get half a > circuit - not a full short, just half. I am using the shields for all the > lo sides, connected them all together with pigtails and then to ground at > the intercom. Any ideas? > > -------- > Don McIntosh > Kitfox Series 7 under construction > Jabiru 3300 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=257079#257079 > > >




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