---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 02/21/05: 32 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:21 AM - Re: 115 vac 3 phase inverter (Richard Riley) 2. 02:27 AM - Re: Antenna / aerial questions (pengilly@southwest.com.au) 3. 03:20 AM - Re: Garmin 330 High vs. Low? (pengilly@southwest.com.au) 4. 05:27 AM - Over Voltage Module/Relay (Troy Maynor) 5. 06:32 AM - Pressure switches (Gary Casey) 6. 06:38 AM - Good Inductive load MOSFET / solid state relay/ motor control (Casey Rayman) 7. 06:40 AM - Re: Pressure switches (Tailgummer@aol.com) 8. 06:57 AM - Pressure Sx'x (Gerry Holland) 9. 07:08 AM - Re: Ex Pilot Question (Robert L. Nuckolls, III) 10. 07:43 AM - Re: Which? (Matt Prather) 11. 07:49 AM - Re: Re: Bendix King Skyforce IIIC GPS battery (Chris Good) 12. 07:53 AM - Re: Antenna / aerial questions (Matt Prather) 13. 08:27 AM - Re: Re: Bendix King Skyforce IIIC GPS battery (Chuck Jensen) 14. 09:08 AM - Re: Blinking lights and warning sounds (Roy Wheaton) 15. 09:32 AM - Re: Pressure switches (AI Nut) 16. 10:55 AM - Re: Pressure switches (John Schroeder) 17. 11:07 AM - Have 'scope, will travel (Robert L. Nuckolls, III) 18. 11:32 AM - Re: Re: Bendix King Skyforce IIIC GPS battery (Chris Good) 19. 01:36 PM - Re: Antenna / aerial questions (James H Nelson) 20. 02:09 PM - P-Mags (Lapsley R & Sandra E. Caldwell) 21. 02:09 PM - P-Mags (Lapsley R & Sandra E. Caldwell) 22. 02:23 PM - Re: P-Mags (Harley) 23. 03:16 PM - Audio Panel Ground Bar (Greg Young) 24. 03:43 PM - A molex dis-connect wrench?? (cecilth@juno.com) 25. 03:43 PM - Hi Bob, My alternator controller. (cecilth@juno.com) 26. 04:04 PM - Re: A molex dis-connect wrench?? (Harley) 27. 04:29 PM - Re: Hi Bob, My alternator controller. (Matt Prather) 28. 04:44 PM - 3-Phase Inverters & 3 Suppliers . Plus inverter for sale! (John Kent) 29. 04:58 PM - Re: Have 'scope, will travel (Charlie England) 30. 05:40 PM - Re: Hi Bob, My alternator controller. (cecilth@juno.com) 31. 06:36 PM - Re: Pressure switches (WRBYARS@aol.com) 32. 10:58 PM - Re: Antenna / aerial questions (Kingsley Hurst) ________________________________ Message 1 _____________________________________ Time: 12:21:00 AM PST US From: Richard Riley Subject: Re: AeroElectric-List: 115 vac 3 phase inverter --> AeroElectric-List message posted by: Richard Riley I have one of those in 12 volt running at JET gyro, it works wonderfully. At 11:33 PM 2/20/05, you wrote: >--> AeroElectric-List message posted by: Gerry Holland > >Dee Hi! > > > I'm searching for a small, 28vdc to 115 vac 400hz, 3 phase inverter to > power > > several very nice JET attitude gyros. > >A Company here in UK may still be able to supply that requirement. >It was in their Catalogue last year with a new Catalogue due out. > >It's Listed as: Inverter 28V DC to 115V 3 phase. Ideal use for Ferranti >FH32. >That would be a UK built Attitude Indicator for the Military and be a fairly >substantial Unit with corresponding power requirement so this inverter >should be adequate. >Size: 150x80x50mm or in proper measurement....6"x3"X2". Weight 700g or 1.5 >US Pounds > >It's part No: RD 102/28. Price $290.00 but subtract 17.5% as you dont need >to pay UK Value added Tax. > >Company details: http://www.afeonline.com or for e-mail: >enquiries@afeonline.com > >Tel No: +44 161 499 0023 > >Best of Luck! > >I used one on a Ferranti FH14 Attitude Indicator. The Inverter device was >fine and physically quiet with no perceived RF Noise although I think it >would need careful placement. It indicated a 6A+ draw at 12V on start up and >settled to about 2A. > >I'll call then later this morning and get an update to you (I'm in UK). > >Regards > >Gerry > > ________________________________ Message 2 _____________________________________ Time: 02:27:52 AM PST US Subject: Re: AeroElectric-List: Antenna / aerial questions From: pengilly@southwest.com.au --> AeroElectric-List message posted by: pengilly@southwest.com.au Kingsley these are used in the Glasair and Glastar line of aircraft and work very well. When you install it make sure that you laminate a layer of cloth over the copper tape and you will have no problems Regards Paul ps over in the west building a Glasair Super II RG do not archive > > Dear Bob et al > > The radio antenna kit supplied by the manufacturer of my kit contains 6m > of RG58C/U cable. It also contains some copper tape for the > manufacturing of a dipole antenna in the rear of the fin. Toroids were > also supplied and the aircraft is of fibreglass construction. > > 1) Considering cost/benefit etc, would I be wise to use RG400 cable > instead ? > > 2) Instead of using the copper tape (others have reported it cracking > after a while from temp changes), would it be okay to bring the inner > part of the aerial cable out through the braid and make the dipole of > these two cable components rather than other material ? > > 3) Use the toroids or not ? > > Comments most welcome. > > Regards > Kingsley Hurst > Europa 281 in Oz. > > ________________________________ Message 3 _____________________________________ Time: 03:20:55 AM PST US Subject: Re: AeroElectric-List: Garmin 330 High vs. Low? From: pengilly@southwest.com.au --> AeroElectric-List message posted by: pengilly@southwest.com.au High and low in electrical speak also stands for open and closed contacts and also on and off Regards Paul > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" > > > At 07:06 PM 2/20/2005 -0700, you wrote: > >>--> AeroElectric-List message posted by: "Roger Evenson" >> >> >>The Garmin 330 Mode S transponder shows two traffic audio outputs, one >>marked "HIGH" and one marked "LOW". What does this mean? Is this jargon >>for positive and negative leads? > > Essentially, yes. HI and LO used to be really significant > in some venues where the audio system used balanced lines > between black boxes and both sides were isolated from ground. > T hen, the HI and LO labels were useful for phasing. Nowadays, > the vast majority of autio is carried on unbalanced lines and > LO is the shield side of the signal . . . if you do an ohmmeter > check between any audio LO pin and power ground, they'll be > directly connected. > > Bob . . . > > ________________________________ Message 4 _____________________________________ Time: 05:27:40 AM PST US From: "Troy Maynor" Subject: AeroElectric-List: Over Voltage Module/Relay --> AeroElectric-List message posted by: "Troy Maynor" Bob, I want to install an OVM14. I have a Rotax 912S. On the Z-7 diagram it shows an overvoltage relay that, in the description of OVM14, should be used with an alternator having an internal regulator, however the Z-7 diagram shows both an EXTERNAL regulator AND the OV disconnect relay. In addition, your parts catalog does not show a overvoltage relay available. Where can I get one, at an auto parts store? One other thing, I have LEDs already installed in my panel as warning lights, including the alternator fail light. Will this work in place of the Alt. lamp shown on Z-7? Thanks. Troy Maynor N120EU Europa Monowheel Classic Left to finish: Paint,interior,engine install, wiring. Quotes from website concerning overvoltage modules for 14 volt systems. "for additional commentary on the matter . . . However over voltage protection may be added alternators with built-in regulators by incorporating an external contactor and a crowbar O.V. module" . I've stopped 661 spam messages. You can too! One month FREE spam protection at http://www.cloudmark.com/spamnetsigs/?rc=al4waa ________________________________ Message 5 _____________________________________ Time: 06:32:33 AM PST US From: "Gary Casey" Subject: AeroElectric-List: Pressure switches --> AeroElectric-List message posted by: "Gary Casey" I have been unable (I haven't looked really hard, I'll admit) to find pressure switches for fuel, oil and vacuum. I would like the fuel and oil pressure switches to go on below about 10-15 psi and the vacuum to go on below about 4 inches vacuum. Is there a source for high-quality switches that do these functions? Of course, I could go to Pep Boys and get an oil pressure switch, but that would probably fail the "high quality" test and they are usually set for 7 psi. Gary Casey ________________________________ Message 6 _____________________________________ Time: 06:38:36 AM PST US From: Casey Rayman Subject: AeroElectric-List: Good Inductive load MOSFET / solid state relay/ motor control --> AeroElectric-List message posted by: Casey Rayman There has been a bit of talk about solid state relays, and motor control lately. Just wanted to add my 2 cents in. I've used the IPS0151 to drive all kinds of inductive loads, its rated to 35A(heatsink) and has built in kickback protection(Diode). Its fairly tolerant of abuse too, as mosfet's go anyway. Digikey carries them and they are fairly cheap. Here is the datasheet: http://www.irf.com/product-info/datasheets/data/ips0151.pdf Casey __________________________________ http://my.yahoo.com ________________________________ Message 7 _____________________________________ Time: 06:40:23 AM PST US From: Tailgummer@aol.com Subject: Re: AeroElectric-List: Pressure switches --> AeroElectric-List message posted by: Tailgummer@aol.com In a message dated 2/21/2005 6:33:31 A.M. Pacific Standard Time, glcasey@adelphia.net writes: I have been unable (I haven't looked really hard, I'll admit) to find pressure switches for fuel, oil and vacuum........ Precise Flight in Oregon sells a low vacuum warning kit (switch, tubing etc.). Works just fine for the vacuum system. John D'Onofrio ________________________________ Message 8 _____________________________________ Time: 06:57:17 AM PST US Subject: AeroElectric-List: Pressure Sx'x From: Gerry Holland --> AeroElectric-List message posted by: Gerry Holland Gary Hi! from UK. A coincidence. I have just placed a pressure Sx on eBay that=B9s surplus from my build. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd1&item5559565262&ssPageN ameSTRK:MESE:IT (Shows pictures and other details) The Company (Gem Sensors) who supplied it have details as follows: http://www.gemssensors.com/SpecTemplatePressureSwitch.asp?nProductGroupID29 7 I had two delivered in the following configuration for about $35.00 each. Gem Sensors PS61 Series Sub Miniature Pressure Switch - Suitable for Low Coolant or Oil Pressure Range: 0.35 - 6 Bar (Adjustable) Factory SET at 5lbs per sq in. Fitting: 1/8th NPT male - Switch: SPST/NC Connections: Spade Terminals Weight: 0.14lbs Regards Gerry ________________________________ Message 9 _____________________________________ Time: 07:08:26 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Ex Pilot Question --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 01:55 AM 2/21/2005 -0500, you wrote: >--> AeroElectric-List message posted by: "DEAN PSIROPOULOS" > > >Question for the Trio Ez Pilot and Navaid (since they use basically the same >servo) folks. The installation instructions for the Ez Pilot recommend a >shielded wire for the PWM (servo movement commands)signal line from the >control head to the servo. Do I need to find some shielded wire . . . if the manufacturer calls it out, it's a reasonable thing to do. > for this >and what should I use? . . . it's a signal wire . . . physical size has nothing to do with its performance. > Is there a Tefzel or MIL-SPEC coaxial cable that I >could/should use? . . . there are LOTS of shielded wires with mil-specs against them and lots of different insulations including Tefzel. > What gauge would it be and where would I get it? 22AWG would be fine I think . . . what does the manufacturer's installation diagrams call out? > Is this >a big deal or could I just use an unshielded wire here? "Big deal" isn't very quantifiable. The answer based on equally un-quantified anecdotes suggests that the servo's control signal is not a strong antagonist . . . but it might be a victim. I think there is greater (but still small) risk that something like strobes firing could cause the servo to "twitch" if it were trying to respond to a command during strobe illumination time. Bottom line is that we could hypothesize about the what-ifs and where-evers for a long time and never deduce the real story. The safest approach is to always comply with manufacturer's installation instructions. At least when you call them with some kind of interference problem, they can't insult your ancestry for not having followed instructions! > What is the >frequency of the pulse width modulation that Trio uses? Would it be an >antagonist to my radios and audio system? Again, no way to know without more data. Suggest you acquire some shielded wire from one of the several capable suppliers to the OBAM aircraft community which include but are not limited to B&C, Steinar, Wicks, Aircraft Spruce, and shucks . . . if it's 10' of wire you need, I can throw a chunk into an envelope for you. Bob . . . ________________________________ Message 10 ____________________________________ Time: 07:43:37 AM PST US Subject: Re: AeroElectric-List: Which? From: "Matt Prather" --> AeroElectric-List message posted by: "Matt Prather" > --> AeroElectric-List message posted by: "Fergus Kyle" > > "Time: 09:44:05 AM PST US > From: WRBYARS@aol.com > Subject: Re: AeroElectric-List: Re: 02/07/05 A Forced Landing > > --> AeroElectric-List message posted by: WRBYARS@aol.com > > Perhaps I missed out on something earlier, however in my airplanes you > could > "loose", or turn off, ALL of the electrical system, and continue to fly > as long as the gas held out (during VFR). The engine runs off of a > magneto thus > supplying It's own power and doesn't need a battery, etc. > Confused, " > > Bill Byars > Me too. Which was meant, "Loose" or "lose"? Spelling counts, > and > 'loose' is an adjective............... > Cheers, Ferg > Spelling does count.. Loose is a verb also, but is almost never used correctly as one. As in "Loose the hounds!" (set free, release).. This is different from "Lose the hounds, dude.." Matt- do not archive ________________________________ Message 11 ____________________________________ Time: 07:49:34 AM PST US From: "Chris Good" Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS battery --> AeroElectric-List message posted by: "Chris Good" Chuck, After 5 yrs, my Skyforce IIIC just started complaining about the battery. I put in a web order last night to McMaster-Carr, per your suggestion: P/N is 6951K999 and the description is "disposable lithium battery Hawker Entercell 3.7V TO6/8AA TCL with one wire pigtail each end." They phoned me this morning & said they don't carry anything like this battery. Is there some magic phrase that I'm missing? Do you, or anyone else, know of any other source for an equivalent? Regards, Chris Good, West Bend, WI RV-6A ----- Original Message ----- From: "Chuck Jensen" Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS battery > > --> AeroElectric-List message posted by: Chuck Jensen > > For all the DIYs. The disassembly is not difficult but as you work your way > down through the board levels, just remove the screws and clips as you go. > The battery leads are soldered directly onto the board. Use a solder-sucker > to desolder the pigtail joints. Put the new battery pigtails in place, > soldered it (not too many close-by components to be heat damaged) and > reassemble. Plug in, turn on and allow internal battery to charge up. > > Cycle unit off/on. The database will likely be corrupted (it's probably a > Political Database). If the memory is corrupted, go into SETUP and clear > memory. The code to clear memory is either 3-3-3-3 or 1-2-3-4. When the > memory is cleared, your pin number is reset to 1-2-3-4. You will lose all > your saved flight plans and/or waypoints, but that's not the end of the > world! > > Kurt, an external battery may get disconnected, or not charged; each time > resulting in loss of your memory and corrupted database. Replacing the > internal battery is a once-every-5-year project and takes less than an > hour...2 hours for the dexterity-challenged. Not a big deal. > > As to the battery itself, the McMaster-Carr P/N is 6951K999 and the > description is "disposable lithium battery Hawker Entercell 3.7V TO6/8AA TCL > with one wire pigtail each end." Price was $13.46 with $3.45 shipping. > > Chuck > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of kurt > schrader > To: aeroelectric-list@matronics.com > Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS > battery > > > --> AeroElectric-List message posted by: kurt schrader > > > Hi Jim, > > What I meant to say is that I wanted to mount the > replacement battery on the outside to avoid opening > the unit again next time. My main power comes off the > aircraft system. An external battery could be of any > diminsions and not have to fit the inside space. It > could be larger or maybe a cheaper substitute? Or > just a radio shack substitute that is easier to get. > > How's that for thinking out of the box? :-) Ok, if > it isn't too hard to do, I'll just stick with the > matching substitute. > > Kurt S. > > --- Jim Stone wrote: > > > Re: AeroElectric-List: RE: Bendix King Skyforce > > IIIC GPS battery > > > > Kert, > > > > I agree it's a bummer, having just gone through the > > process myself. I > > also did some investigations inside the box. It is > > NOT a standard > > identifiable battery as one would expect. This is > > probably a legacy of > > the unit originally being designed and built in > > Great Britain, then the > > company was bought by Bendix/King. > > > > Since the battery is used to keep the RAM alive, an > > external battery would still be required. > > > > Mine lasted over 5 years before the message poped > up. > > > > Good Luck, > > > > Jim Stone > > > > __________________________________ > > -- ________________________________ Message 12 ____________________________________ Time: 07:53:49 AM PST US Subject: Re: AeroElectric-List: Antenna / aerial questions From: "Matt Prather" --> AeroElectric-List message posted by: "Matt Prather" As Bob suggested, I believe some of the embedded antenna suffer from bad termination technique and improper strain relief. One place where the antenna may have problems is glassed into a landing gear leg. I could imagine that embedded into the bottom of the arc would be the worst case scenario. The fiberglass matrix elogates under load. The copper may not be stretchy enough to keep up with the glass. If embedded in a stiff structure, and with proper strain relief, everything is good. Regards, Matt- VE N34RD, C150 N714BK > --> AeroElectric-List message posted by: "Eric Ruttan" > > >> I've often wondered how well thin foil antennas perform when >> bonded directly to composite shells. The differences in >> thermal coefficient of expansion will probably cause cracks. The >> width of the foil is a plus as it improves bandwidth of >> the antenna. VHF comm has a greater spread of useful frequencies >> (percentage wise) than any other service we use. The thin, flat >> conductors are attractive. Making them out of copper makes them >> solderable too. >> >> Hmmmm . . . come to think of it, etched circuit board material >> comes in big sheets of 0.062" fiberglas and epoxy with .0013" >> copper sheet bonded to it. I've never heard any concern about >> hairline cracks due to temperature cycling. I suspect your >> worries don't have much foundation in physics. It's very >> likely that your antenna assembled with the materials you >> have will perform as expected for longer than you will >> own the airplane. >> >> Bob . . . > > I cant wrangle electrons, but this I know. Thousands of Burt Rutan's > canard composites, and derivatives of, have put copper foil strip > antennas in the winglets. No problems. > > An example can be found here > http://www.canardaviation.com/cozy/chap20.htm > > ________________________________ Message 13 ____________________________________ Time: 08:27:04 AM PST US Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS battery From: "Chuck Jensen" --> AeroElectric-List message posted by: "Chuck Jensen" Chris, I checked and you have the P/N and description exactly as I entered it in my email last fall, so that's not the problem. ToDo: 1. Call McMaster and try again. Results may vary depending on who you get. You might mention that it may have been a special order. 2. I will look in our archives to see if I can find the actual invoice. If I can, I'll send you the invoice number so you can ask for the same identical component by referencing the invoice number. McMaster is actually pretty squared away, but with a quadzillion different parts and materials, its amazing they can find anything. So, a second attempt is time well spent. Chuck -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Chris Good Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS battery --> AeroElectric-List message posted by: "Chris Good" Chuck, After 5 yrs, my Skyforce IIIC just started complaining about the battery. I put in a web order last night to McMaster-Carr, per your suggestion: P/N is 6951K999 and the description is "disposable lithium battery Hawker Entercell 3.7V TO6/8AA TCL with one wire pigtail each end." They phoned me this morning & said they don't carry anything like this battery. Is there some magic phrase that I'm missing? Do you, or anyone else, know of any other source for an equivalent? Regards, Chris Good, West Bend, WI RV-6A ----- Original Message ----- From: "Chuck Jensen" Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS battery > > --> AeroElectric-List message posted by: Chuck Jensen > > For all the DIYs. The disassembly is not difficult but as you work your way > down through the board levels, just remove the screws and clips as you go. > The battery leads are soldered directly onto the board. Use a solder-sucker > to desolder the pigtail joints. Put the new battery pigtails in place, > soldered it (not too many close-by components to be heat damaged) and > reassemble. Plug in, turn on and allow internal battery to charge up. > > Cycle unit off/on. The database will likely be corrupted (it's probably a > Political Database). If the memory is corrupted, go into SETUP and clear > memory. The code to clear memory is either 3-3-3-3 or 1-2-3-4. When the > memory is cleared, your pin number is reset to 1-2-3-4. You will lose all > your saved flight plans and/or waypoints, but that's not the end of the > world! > > Kurt, an external battery may get disconnected, or not charged; each time > resulting in loss of your memory and corrupted database. Replacing the > internal battery is a once-every-5-year project and takes less than an > hour...2 hours for the dexterity-challenged. Not a big deal. > > As to the battery itself, the McMaster-Carr P/N is 6951K999 and the > description is "disposable lithium battery Hawker Entercell 3.7V TO6/8AA TCL > with one wire pigtail each end." Price was $13.46 with $3.45 shipping. > > Chuck > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of kurt > schrader > To: aeroelectric-list@matronics.com > Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS > battery > > > --> AeroElectric-List message posted by: kurt schrader > > > Hi Jim, > > What I meant to say is that I wanted to mount the > replacement battery on the outside to avoid opening > the unit again next time. My main power comes off the > aircraft system. An external battery could be of any > diminsions and not have to fit the inside space. It > could be larger or maybe a cheaper substitute? Or > just a radio shack substitute that is easier to get. > > How's that for thinking out of the box? :-) Ok, if > it isn't too hard to do, I'll just stick with the > matching substitute. > > Kurt S. > > --- Jim Stone wrote: > > > Re: AeroElectric-List: RE: Bendix King Skyforce > > IIIC GPS battery > > > > Kert, > > > > I agree it's a bummer, having just gone through the > > process myself. I > > also did some investigations inside the box. It is > > NOT a standard > > identifiable battery as one would expect. This is > > probably a legacy of > > the unit originally being designed and built in > > Great Britain, then the > > company was bought by Bendix/King. > > > > Since the battery is used to keep the RAM alive, an > > external battery would still be required. > > > > Mine lasted over 5 years before the message poped > up. > > > > Good Luck, > > > > Jim Stone > > > > __________________________________ > > -- ________________________________ Message 14 ____________________________________ Time: 09:08:36 AM PST US From: Roy Wheaton Subject: AeroElectric-List: Re: Blinking lights and warning sounds --> AeroElectric-List message posted by: Roy Wheaton Just a thought or two: We released our monitor about 3 years ago for motorcycles. It monitors oil pressure, charging system, and optionally coolant temp, and sounds various loud warnings to indicate the type of failure. Sales were minimal, because riders said "I always watch my lights." This in spite of the fact that most motorcycles don't have a warning light for the charging system! When they became stranded because their alternator plug fell out, they became customers. It's heartwarming to hear pilots, who are trained to scan their instruments constantly, recognize the need for audible and visual alarms. We moved into developing products for ultralights and rally vehicles, using multiple response voice chips; a microprocessor monitors the various functions, and then selects a voice message which is passed through the intercom. There is NO substitute for multiple alarms. As my belt and suspender-wearing daddy used to say, "you can't be too careful..." ________________________________ Message 15 ____________________________________ Time: 09:32:26 AM PST US From: AI Nut Subject: Re: AeroElectric-List: Pressure switches --> AeroElectric-List message posted by: AI Nut There is a person selling a Honeywell oil and fuel pressure sensor for $12 each. From what I've read, they are top quality devices. He apparently bought a ton of them surplus and is still selling them. I'll have to dig around to find his info if anyone is interested. Tailgummer@aol.com wrote: >--> AeroElectric-List message posted by: Tailgummer@aol.com > > >In a message dated 2/21/2005 6:33:31 A.M. Pacific Standard Time, >glcasey@adelphia.net writes: > >I have been unable (I haven't looked really hard, I'll admit) to find >pressure switches for fuel, oil and vacuum........ > > >Precise Flight in Oregon sells a low vacuum warning kit (switch, tubing >etc.). Works just fine for the vacuum system. > > John D'Onofrio > > ________________________________ Message 16 ____________________________________ Time: 10:55:39 AM PST US Subject: Re: AeroElectric-List: Pressure switches From: "John Schroeder" --> AeroElectric-List message posted by: "John Schroeder" Gary - Allied Electronics has the oil pressure switch that goes with a Hobbs meter. Costs about $30. It is the dual circuit kind - one NO and OC terminal. And you can get it in various pressure settings. We wired one contact to the Hobbs and the other to an oil pressure low light. Let me know if you need the wiring diagram for this. ACS only carries the single circuitkind. Allied might also carry other kinds. Cheers, JOhn > > I have been unable (I haven't looked really hard, I'll admit) to find > pressure switches for fuel, oil and vacuum. I would like the fuel and > oil > pressure switches to go on below about 10-15 psi and the vacuum to go on > below about 4 inches vacuum. Is there a source for high-quality switches > that do these functions? Of course, I could go to Pep Boys and get an > oil > pressure switch, but that would probably fail the "high quality" test and > they are usually set for 7 psi. > > Gary Casey ________________________________ Message 17 ____________________________________ Time: 11:07:02 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Have 'scope, will travel --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" I'm packing up to climb onto a big iron bird for a trip to Mississippi. Seems I'm Mr. Ground Fault Expert now that the saga that raged over the Xmas holidays has been written. I'll be off-list for several days. We're scheduled back Friday but I tuned up the ol' 'scope and sharpened the axes and saws . . . maybe we'll get it fixed in a few hours and be back on Wednesday. Bob . . . -------------------------------------------------------- < Throughout history, poverty is the normal condition > < of man. Advances which permit this norm to be > < exceeded -- here and there, now and then -- are the > < work of an extremely small minority, frequently > < despised, often condemned, and almost always opposed > < by all right-thinking people. Whenever this tiny > < minority is kept from creating, or (as sometimes > < happens) is driven out of a society, the people > < then slip back into abject poverty. > < > < This is known as "bad luck". > < -Lazarus Long- > <------------------------------------------------------> http://www.aeroelectric.com ________________________________ Message 18 ____________________________________ Time: 11:32:07 AM PST US From: "Chris Good" Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS battery --> AeroElectric-List message posted by: "Chris Good" Chuck, Thanks for your help with this. Your original invoice from McMaster might help. Do you recall the physical size of the battery? Or perhaps you have the old one & could measure it. I'd rather not take my Skymap apart till I have a replacement battery in hand! Digikey carries several 3.6v lithium batteries in different sizes with leads (AA or 1/2 AA for instance). I'm hoping one of these might be suitable. Regards, Chris Good. ----- Original Message ----- From: "Chuck Jensen" Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS battery > > --> AeroElectric-List message posted by: "Chuck Jensen" > > Chris, > > I checked and you have the P/N and description exactly as I entered > it in my email last fall, so that's not the problem. ToDo: > > 1. Call McMaster and try again. Results may vary depending > on who you get. You might mention that it may have been a special > order. > > 2. I will look in our archives to see if I can find the > actual invoice. If I can, I'll send you the invoice number so you > can ask for the same identical component by referencing the invoice > number. > > McMaster is actually pretty squared away, but with a quadzillion > different parts and materials, its amazing they can find anything. > So, a second attempt is time well spent. > > Chuck > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Chris > Good > To: aeroelectric-list@matronics.com > Subject: RE: AeroElectric-List: RE: Bendix King Skyforce IIIC GPS > battery > > > --> AeroElectric-List message posted by: "Chris Good" > > Chuck, > > After 5 yrs, my Skyforce IIIC just started complaining about the > battery. I put in a web order last night to McMaster-Carr, per > your suggestion: > > P/N is 6951K999 and the description is "disposable lithium battery > Hawker Entercell 3.7V TO6/8AA TCL > with one wire pigtail each end." > > They phoned me this morning & said they don't carry anything like > this battery. Is there some magic phrase that I'm missing? Do > you, or anyone else, know of any other source for an equivalent? > > Regards, > > Chris Good, > West Bend, WI > RV-6A > -- ________________________________ Message 19 ____________________________________ Time: 01:36:04 PM PST US Subject: Re: AeroElectric-List: Antenna / aerial questions From: James H Nelson --> AeroElectric-List message posted by: James H Nelson Kingsley, I built a monowheel and installed the factory di-pole in the tail. It worked very well. I did no special treatment for the instalation. Just kept the ends free so I could trim the length to get the correct bandwidth. You need to install the torrids just before you terminate the cable at the di-pole. This keeps the standing waves such that you can get a SWR ratio below 2:1. I was able to get a ratio of about 1.2:1 in the middle of the band. I "rented" Bob Nuchols professional SWR meter and tuned the antenna just right. His instrument was the key in doing it right.. I made up a graph with swr v:s frequency. I actually had a dip in the middle but it was great. Cheep and very effective. When the antenna was finally tuned, I put a coat of epoxy on the antenna for the full the length. My torrids were just inside the fin close out. BTW, I had to solder some lengths back on the antenna to lengthern it after I found out I had trimmed off too much. I wanted the antenna at peak performance Jim Nelson N15JN (sold) ________________________________ Message 20 ____________________________________ Time: 02:09:04 PM PST US From: "Lapsley R & Sandra E. Caldwell" Subject: AeroElectric-List: P-Mags --> AeroElectric-List message posted by: "Lapsley R & Sandra E. Caldwell" Has anyone flow with a P-mags yet? For that matter. Does anyone have any idea about how many have been shipped? Roger ________________________________ Message 21 ____________________________________ Time: 02:09:05 PM PST US From: "Lapsley R & Sandra E. Caldwell" Subject: AeroElectric-List: P-Mags --> AeroElectric-List message posted by: "Lapsley R & Sandra E. Caldwell" Has anyone flow with a P-mags yet? For that matter., does anyone have any idea about how many have been shipped? Roger ________________________________ Message 22 ____________________________________ Time: 02:23:32 PM PST US From: Harley Subject: Re: AeroElectric-List: P-Mags --> AeroElectric-List message posted by: Harley Not sure how many have been shipped, but I just received mine today, and it was serial number 118. Just printed out the manual (came on a disk). Dropped them off at the hangar this afternoon...didn't stay long, the plow hadn't got passed the taxi strip as yet! I know that someone else here has a much earlier serial number and has been flying with them. Harley Dixon Lapsley R & Sandra E. Caldwell wrote: >--> AeroElectric-List message posted by: "Lapsley R & Sandra E. Caldwell" > >Has anyone flow with a P-mags yet? For that matter. Does anyone have >any idea about how many have been shipped? > >Roger > > > > No virus found in this outgoing message. Checked by AVG Anti-Virus. ________________________________ Message 23 ____________________________________ Time: 03:16:22 PM PST US From: "Greg Young" Subject: AeroElectric-List: Audio Panel Ground Bar --> AeroElectric-List message posted by: "Greg Young" I'm getting ready to wire my radio stack which includes an SL-15 (PM7000B) audio panel. I've wired this same stack before but this SL-15 includes a "ground bar" which the previous one did not. I couldn't find any reference to it in their manual other than for mounting it. It's a thin strip of metal that spans the rear case between the connectors. It appears to be tinned so I suspect it's there to receive the forest of grounds and shields that you have to contend with. It was a mess the last time but that was before I learned about solder seals and pigtails. Should I just throw away the ground bar and go with the pigtails or is there some benefit to using it? If so, how do I use it? Aside from electrical and physical robustness, I'm also striving for neatness this time around. Suggestions? Thanks, Greg Young ________________________________ Message 24 ____________________________________ Time: 03:43:05 PM PST US Subject: AeroElectric-List: A molex dis-connect wrench?? From: cecilth@juno.com --> AeroElectric-List message posted by: cecilth@juno.com Seems to me there should be a molex dis-connect wrench. There are tabs on the sides that look like they are there for that purpose. Where would I find such a thing and what would it be called. Cecil RV6a ________________________________ Message 25 ____________________________________ Time: 03:43:05 PM PST US Subject: AeroElectric-List: Hi Bob, My alternator controller. From: cecilth@juno.com --> AeroElectric-List message posted by: cecilth@juno.com Hi Bob, My Alternator Controller ( from BNC) has never had volts hooked up to it yet. Its bolted to a grounded surface. I find all seven stations are then grounded with no wires hooked to it at all. Something smells in denmark. Whats going on? Bad Controller?? Cecil Hatfield ________________________________ Message 26 ____________________________________ Time: 04:04:59 PM PST US From: Harley Subject: Re: AeroElectric-List: A molex dis-connect wrench?? --> AeroElectric-List message posted by: Harley Cecil... Those tabs are for mounting in chassis...they bend back and lock the receptacle into the sheet metal. As far as disconnecting, all I ever did was sweat and strain and pull! And we had some 50 pin versions to work with! Harley cecilth@juno.com wrote: >--> AeroElectric-List message posted by: cecilth@juno.com > > >Seems to me there should be a molex dis-connect wrench. >There are tabs on the sides that look like they are there for that >purpose. >Where would I find such a thing and what would it be called. >Cecil >RV6a > > > > No virus found in this outgoing message. Checked by AVG Anti-Virus. ________________________________ Message 27 ____________________________________ Time: 04:29:48 PM PST US Subject: Re: AeroElectric-List: Hi Bob, My alternator controller. From: "Matt Prather" --> AeroElectric-List message posted by: "Matt Prather" Since Bob is out of town for a few days... I assume you are using a meter of some sort to determine that they are 'grounded.' I wouldn't be surprised if each of the inputs have a diode stack or similar structure connected as input polarity protection. Some terminals may have fairly large capacitors on them. Depending on what kind of meter you have and how you hook it up to each terminal, they may look nearly like they are shorted to ground. If you need an answer right away, you could probably contact one of the techies at B and C. They have been very responsive to my questions and requests in the past. Regards, Matt- > --> AeroElectric-List message posted by: cecilth@juno.com > > > Hi Bob, > My Alternator Controller ( from BNC) has never had volts hooked up to it > yet. > Its bolted to a grounded surface. I find all seven stations are then > grounded > with no wires hooked to it at all. Something smells in denmark. Whats > going on? > Bad Controller?? > Cecil Hatfield > > ________________________________ Message 28 ____________________________________ Time: 04:44:10 PM PST US From: "John Kent" Subject: AeroElectric-List: 3-Phase Inverters & 3 Suppliers . Plus inverter for sale! --> AeroElectric-List message posted by: "John Kent" As well as Chris Quayle and RD aviation, consider also Andy Wright ( http://freespace.virgin.net/andy.wright617/ ). I bought one of his inverters to run a Bendix J8 horizon - turned out the tilt could not be doctored for 8 degrees - bummer! The inverter is a nice 14V to 115V/3ph unit which I will now part with for a reasonable offer. I purchased a Ferranti horizon (8 degree !) from Chris Quayle. It came with an even nicer inverter, lighter and with an on-board cooling fan. Both Andy and Chris produce the inverters themselves using high quality multi-pin connectors, etc. The examples of RD Aviation units that I have seen all appear to have screws to hold the connecting wires in place - not as nice quality, (IMHO). Not much difference in the price if I recall correctly. Contact Chris or Andy to see if they can supply the 28V to 115V/3ph unit you require. John Kent (RV-4 EI-DIY) ________________________________ Message 29 ____________________________________ Time: 04:58:07 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Have 'scope, will travel --> AeroElectric-List message posted by: Charlie England Robert L. Nuckolls, III wrote: >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" > >I'm packing up to climb onto a big iron bird for a trip to >Mississippi. Seems I'm Mr. Ground Fault Expert now that the >saga that raged over the Xmas holidays has been written. > >I'll be off-list for several days. We're scheduled back >Friday but I tuned up the ol' 'scope and sharpened the >axes and saws . . . maybe we'll get it fixed in a few >hours and be back on Wednesday. > > > Bob . . . > > If you're going to be in Jackson & have some free time in the afternoon or evening, give me a call & come by to visit at Slobovia Outernational Airport (MS71). We are about 10 miles NW of Jackson on HWY 49 with some good MS catfish just down the road from the airstrip. I'm home by 1:00 PM each day. Charlie 601-879-9596 ________________________________ Message 30 ____________________________________ Time: 05:40:31 PM PST US Subject: Re: AeroElectric-List: Hi Bob, My alternator controller. From: cecilth@juno.com --> AeroElectric-List message posted by: cecilth@juno.com I do the checking with a meter. I touch the case and all 7 terminals and get a full needle deflection at each terminal. The other probe is grounded to the airframe. Cecil On Mon, 21 Feb 2005 17:27:02 -0700 (MST) "Matt Prather" writes: > --> AeroElectric-List message posted by: "Matt Prather" > > > Since Bob is out of town for a few days... > > I assume you are using a meter of some sort to determine that > they are 'grounded.' > > I wouldn't be surprised if each of the inputs have a diode stack or > similar structure connected as input polarity protection. Some > terminals may have fairly large capacitors on them. Depending on > what kind of meter you have and how you hook it up to each terminal, > they may look nearly like they are shorted to ground. > > If you need an answer right away, you could probably contact one > of the techies at B and C. They have been very responsive to my > questions and requests in the past. > > Regards, > > Matt- > > > --> AeroElectric-List message posted by: cecilth@juno.com > > > > > > Hi Bob, > > My Alternator Controller ( from BNC) has never had volts hooked up > to it > > yet. > > Its bolted to a grounded surface. I find all seven stations are > then > > grounded > > with no wires hooked to it at all. Something smells in denmark. > Whats > > going on? > > Bad Controller?? > > Cecil Hatfield > > > > > > > http://www.matronics.com/FAQ/AeroElectric-List.htm > > > > > ________________________________ Message 31 ____________________________________ Time: 06:36:34 PM PST US From: WRBYARS@aol.com Subject: Re: AeroElectric-List: Pressure switches --> AeroElectric-List message posted by: WRBYARS@aol.com I'd like to have the info on how to contact this person, please. Thank you, Bill Byars ________________________________ Message 32 ____________________________________ Time: 10:58:36 PM PST US From: "Kingsley Hurst" Subject: RE: AeroElectric-List: Antenna / aerial questions --> AeroElectric-List message posted by: "Kingsley Hurst" Bob K wrote Check out the files you'll find at: http://www.aeroelectric.com/articles/Antennas Excellent help thank you Bob. Will have to see if I can find Shoe Goo or equivalent over here. Do not archive. Kingsley in Oz.