AeroElectric-List Digest Archive

Fri 01/26/07


Total Messages Posted: 21



Today's Message Index:
----------------------
 
     1. 04:48 AM - Re: Homemade Audio Panel (Robert L. Nuckolls, III)
     2. 06:41 AM - Ohm drop for welder's cable (Terry Miles)
     3. 06:41 AM - The problem with George (Robert L. Nuckolls, III)
     4. 07:16 AM - Re: Ohm drop for welder's cable (Robert L. Nuckolls, III)
     5. 08:30 AM - Re: Homemade Audio Panel (John Coloccia)
     6. 09:02 AM - Re: Homemade Audio Panel (Ron Shannon)
     7. 09:11 AM - Re: SD-8 Alternator Wiring (Valovich, Paul)
     8. 09:20 AM - Re: Homemade Audio Panel (Dan Morrow)
     9. 09:58 AM - Is garbage picked SWR meter useful? ()
    10. 10:16 AM - Solder tab connectors (Greg Young)
    11. 10:35 AM - Re: Is garbage picked SWR meter useful? (luckymacy@comcast.net (lucky))
    12. 10:40 AM - Re: Is garbage picked SWR meter useful? (Bill Boyd)
    13. 10:59 AM - Re: Is garbage picked SWR meter useful? (Dave N6030X)
    14. 10:59 AM - Re: Is garbage picked SWR meter useful? (Matt Prather)
    15. 11:12 AM - Re: Is garbage picked SWR meter useful? (luckymacy@comcast.net (lucky))
    16. 11:34 AM - Re: Is garbage picked SWR meter useful? ()
    17. 11:39 AM - Re: IR alternators in airplanes (JUST say NO to OV relays) ()
    18. 04:18 PM - Re: Solder tab connectors (Rodney Dunham)
    19. 05:19 PM - Re: Solder tab connectors (Robert L. Nuckolls, III)
    20. 05:20 PM - Re: Solder tab connectors (Robert L. Nuckolls, III)
    21. 06:52 PM - Re: Ohm drop for welder's cable (Terry Miles)
 
 
 


Message 1


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    Time: 04:48:56 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: Homemade Audio Panel
    At 12:57 PM 1/25/2007 -0600, you wrote: > >Hi All, > >I have an experimental aircraft I built. It currently has one comm >radio. I am >interested in adding a second comm radio. To do this, one must be able to >switch between the radios. The common method for this is to install in audio >panel of which there are many versions on the market. The problem with these >solutions is that they have lots of switches such as nav radios, dme, adf, >etc. > Does anyone know if a unit that only has switches for 2 comm radios? The >closest I can find is the PMA-4000 which also includes an intercom and 2 nav >inputs. I already have an intercom which handles my needs fine. I was >thinking of adding a 2 position, 3 circuit switch for radio selection. The 3 >circuits would be for audio, mic, and ptt. If I wanted to expand this system, >I could add a pair of 2 position, 1 circuit switches to allow the radio >that is >not selected with the first 3 circuit switch. > >Any thoughts/comments would be appreciated. Suggest you review . . . http://aeroelectric.com/articles/Rev11/18Audio_R11.pdf and stir the concepts discussed into your deliberations and design plans. Also see . . . http://www.aeroelectric.com/DIY/Audio_Isolation_Amplifier.pdf Bob . . . ---------------------------------------- ( IF one aspires to be "world class", ) ( what ever you do must be exercised ) ( EVERY day . . . ) ( R. L. Nuckolls III ) ----------------------------------------


    Message 2


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    Time: 06:41:47 AM PST US
    From: "Terry Miles" <terrence_miles@hotmail.com>
    Subject: Ohm drop for welder's cable
    Does anybody know the ohm drop per 1000 feet for welder's cable? Or failing that number....is welders cable likely to have more (or have less) line resistance than Tefzel 2awg would have? Thanks Terry


    Message 3


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    Time: 06:41:47 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: The problem with George
    George, you've been asked politely before to cease your disruptive behaviors in this classroom. If we're to interpret your latest rants as an unwillingness to comply with a simple-request, I'll have to make sure new-comers to the List are aware of your track record. I'm not going to respond to the lack of understanding and substance in your last postings. Instead, I've published a small excerpt from our past conversations at: http://www.aeroelectric.com/articles/gmcjetpilot.html I considered posting it at the time you were asked to leave some months ago but held off after you appeared to honor my request. Since you've chosen to resume your old counter productive and disruptive habits, it seems prudent to let everyone know what you're about and share a snapshot of what we've already experienced with your unwelcome activities here on the List. Do the honorable thing sir. Bob . . .


    Message 4


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    Time: 07:16:49 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: Ohm drop for welder's cable
    At 09:40 AM 1/26/2007 -0500, you wrote: ><terrence_miles@hotmail.com> > > >Does anybody know the ohm drop per 1000 feet for welder's cable? Or failing >that number....is welders cable likely to have more (or have less) line >resistance than Tefzel 2awg would have? Assuming that the manufacturer of any kind of wire understands the various standards for specifying the makeup and performance of wire, then you're on solid ground to compare the resistance values of anyone's 2AWG, 4AWG etc wire irrespective of type or intended use. You used the phrase "welders cable" . . . know that it comes in a variety of sizes including 0, 2, 4 and 6AWG. If you purchase 2AWG welding cable, it's a fair bet that the resistance is the same as M22759 2AWG cable. Bob . . .


    Message 5


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    Time: 08:30:12 AM PST US
    From: John Coloccia <john@ballofshame.com>
    Subject: Re: Homemade Audio Panel
    Neat, Bob. Do you happen to have a design for a Marker Beacon receiver kicking around anywhere? -John Robert L. Nuckolls, III wrote: > <nuckollsr@cox.net> > > At 12:57 PM 1/25/2007 -0600, you wrote: > >> >> Hi All, >> >> I have an experimental aircraft I built. It currently has one comm >> radio. I am >> interested in adding a second comm radio. To do this, one must be >> able to >> switch between the radios. The common method for this is to install >> in audio >> panel of which there are many versions on the market. The problem >> with these >> solutions is that they have lots of switches such as nav radios, dme, >> adf, etc. >> Does anyone know if a unit that only has switches for 2 comm >> radios? The >> closest I can find is the PMA-4000 which also includes an intercom >> and 2 nav >> inputs. I already have an intercom which handles my needs fine. I was >> thinking of adding a 2 position, 3 circuit switch for radio >> selection. The 3 >> circuits would be for audio, mic, and ptt. If I wanted to expand >> this system, >> I could add a pair of 2 position, 1 circuit switches to allow the >> radio that is >> not selected with the first 3 circuit switch. >> >> Any thoughts/comments would be appreciated. > > Suggest you review . . . > > http://aeroelectric.com/articles/Rev11/18Audio_R11.pdf > > and stir the concepts discussed into your deliberations > and design plans. Also see . . . > > http://www.aeroelectric.com/DIY/Audio_Isolation_Amplifier.pdf > > Bob . . . > > ---------------------------------------- > ( IF one aspires to be "world class", ) > ( what ever you do must be exercised ) > ( EVERY day . . . ) > ( R. L. Nuckolls III ) > ---------------------------------------- > >


    Message 6


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    Time: 09:02:38 AM PST US
    From: Ron Shannon <rshannon@cruzcom.com>
    Subject: Re: Homemade Audio Panel
    For a marker beacon receiver kit, see http://rstengineering.com Ron John Coloccia wrote: > <john@ballofshame.com> > > Neat, Bob. Do you happen to have a design for a Marker Beacon receiver > kicking around anywhere? > > -John


    Message 7


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    Time: 09:11:59 AM PST US
    Subject: Re: SD-8 Alternator Wiring
    From: "Valovich, Paul" <pvalovich@dcscorp.com>
    Life is indeed harder when you're stupid. I submitted the above from memory while on the road. What I really meant to say was Z-13 / 8.


    Message 8


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    Time: 09:20:43 AM PST US
    From: "Dan Morrow" <DanFM01@butter.toast.net>
    Subject: Re: Homemade Audio Panel
    >>When I transmit on one, I turn the volume down on the other so as not to >>hear the squeal. It's not the best way, but it's definitely the cheapest >>way. I believe most com radios have a suppressor line output. They can be wired so that when one is transmitting the other's receiver is turned off.


    Message 9


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    Time: 09:58:10 AM PST US
    Subject: Is garbage picked SWR meter useful?
    From: <rparigor@SUFFOLK.LIB.NY.US>
    I acquired form a garbage pick (Ham gave it to me some years back) a Micronta Field Strength / SWR Tester On bottom it says MFGed for Rat Shack with a CAT# 21-525B The connectors in the backfor ANT and TRANS have a serrated crown, are 610" in diameter and the center hole looks like it takes a pin .150" in diameter. The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 There is a switch that has a setting for REF and FWD and an adjustable knob that is labeled CAL One more thing, a small hole in the top that looks like you plug into that is labeled FS ANT and is ~ .077" in diameter. Sorry bout these Newbie questions: Could I use this meter to test my Becker Mode C Transponder and Com.? What settings and scale would I use and what am I looking for? If this is unusable, any recommendations on what would be a good tool for the job? Thx. Ron Parigoris


    Message 10


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    Time: 10:16:01 AM PST US
    From: "Greg Young" <gyoung@cs-sol.com>
    Subject: Solder tab connectors
    I find myself with a raft of switches that have solder tab connectors (no fastons available) and must confess to ignorance of the accepted wiring technique for them. The only picture book I could find was for a rotary switch and that showed the wire soldered flat to the tab without any mechanical connection thru the hole. Is this the norm for all solder tabs or just due to the nature of the rotary switch? If a mechanical connection before soldering is desirable I can envision several ways of doing it and have probably used them all on the occasional connector I've encountered in the past. This time I have a panel full of them and would like to make it as neat and tidy as possible. Is there a best or accepted method or does it not really matter in our applications? Thanks. Regards, Greg Young - Houston (DWH) RV-6 N6GY - project Phoenix Navion N5221K - just an XXL RV-6A


    Message 11


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    Time: 10:35:21 AM PST US
    From: luckymacy@comcast.net (lucky)
    Subject: Re: Is garbage picked SWR meter useful?
    http://www.flycom.co.uk/antenna_swr.htm http://www.bellscb.com/cb_radio_hobby/swr.html lucky -------------- Original message -------------- From: <rparigor@SUFFOLK.LIB.NY.US> > > I acquired form a garbage pick (Ham gave it to me some years back) a > Micronta Field Strength / SWR Tester > > On bottom it says MFGed for Rat Shack with a CAT# 21-525B > > The connectors in the backfor ANT and TRANS have a serrated crown, are > 610" in diameter and the center hole looks like it takes a pin .150" in > diameter. > > The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL > > Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 > > There is a switch that has a setting for REF and FWD and an adjustable > knob that is labeled CAL > > One more thing, a small hole in the top that looks like you plug into that > is labeled FS ANT and is ~ .077" in diameter. > > > Sorry bout these Newbie questions: > > Could I use this meter to test my Becker Mode C Transponder and Com.? > > What settings and scale would I use and what am I looking for? > > If this is unusable, any recommendations on what would be a good tool for > the job? > > Thx. > Ron Parigoris > > > > > > > > > > <html><body> <DIV>&nbsp;</DIV> <DIV><A href="http://www.flycom.co.uk/antenna_swr.htm">http://www.flycom.co.uk/antenna_swr.htm</A></DIV> <DIV><A href="http://www.bellscb.com/cb_radio_hobby/swr.html">http://www.bellscb.com/cb_radio_hobby/swr.html</A></DIV> <DIV>&nbsp;</DIV> <DIV>lucky</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: &lt;rparigor@SUFFOLK.LIB.NY.US&gt; <BR><BR>&gt; --&gt; AeroElectric-List message posted by: <RPARIGOR@SUFFOLK.LIB.NY.US><BR>&gt; <BR>&gt; I acquired form a garbage pick (Ham gave it to me some years back) a <BR>&gt; Micronta Field Strength / SWR Tester <BR>&gt; <BR>&gt; On bottom it says MFGed for Rat Shack with a CAT# 21-525B <BR>&gt; <BR>&gt; The connectors in the backfor ANT and TRANS have a serrated crown, are <BR>&gt; 610" in diameter and the center hole looks like it takes a pin .150" in <BR>&gt; diameter. <BR>&gt; <BR>&gt; The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL <BR>&gt; <BR>&gt; Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 <BR>&gt; <BR>&gt; There is a switch that has a setting for REF and FWD and an adjustable <BR>&gt; knob that is labeled CAL <BR>&gt; <BR>&gt; One more t hing, AeroEl <pre><b><font size=2 color="#000000" face="courier new,courier"> </b></font></pre></body></html>


    Message 12


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    Time: 10:40:36 AM PST US
    From: "Bill Boyd" <sportav8r@gmail.com>
    Subject: Re: Is garbage picked SWR meter useful?
    That's a "CB" style meter good through perhaps 50 MHz. Not reliable (not properly calibrated) at VHF comm frequencies and certainly not at transponder ones. Connectors are UHF-style coax (SO-239) and won't fit anything on your plane, most likely. Tell us what kind of "testing" you had in mind. Transmitting into a poorly matched load might damage what you are trying to "test." -Bill B On 1/26/07, rparigor@suffolk.lib.ny.us <rparigor@suffolk.lib.ny.us> wrote: > > I acquired form a garbage pick (Ham gave it to me some years back) a > Micronta Field Strength / SWR Tester > > On bottom it says MFGed for Rat Shack with a CAT# 21-525B > > The connectors in the backfor ANT and TRANS have a serrated crown, are > 610" in diameter and the center hole looks like it takes a pin .150" in > diameter. > > The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL > > Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 > > There is a switch that has a setting for REF and FWD and an adjustable > knob that is labeled CAL > > One more thing, a small hole in the top that looks like you plug into that > is labeled FS ANT and is ~ .077" in diameter. > > > Sorry bout these Newbie questions: > > Could I use this meter to test my Becker Mode C Transponder and Com.? > > What settings and scale would I use and what am I looking for? > > If this is unusable, any recommendations on what would be a good tool for > the job? > > Thx. > Ron Parigoris > >


    Message 13


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    Time: 10:59:09 AM PST US
    From: Dave N6030X <N6030X@DaveMorris.com>
    Subject: Re: Is garbage picked SWR meter useful?
    Ron, a lot of the SWR meters are designed for HF and won't work worth crap at VHF (your Com) or UHF (your transponder). You'll need to check that particular model and find out if it is designed to work at VHF, but a quick Google search here makes me believe it is for HF only. The serrated crown connectors are called SO-239 and are designed to mate with PL-259 plugs on coax that are most common for HF antennas. Dave Morris N5UP At 10:57 AM 1/26/2007, you wrote: > >I acquired form a garbage pick (Ham gave it to me some years back) a >Micronta Field Strength / SWR Tester > >On bottom it says MFGed for Rat Shack with a CAT# 21-525B > >The connectors in the backfor ANT and TRANS have a serrated crown, are >610" in diameter and the center hole looks like it takes a pin .150" in >diameter. > >The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL > >Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 > >There is a switch that has a setting for REF and FWD and an adjustable >knob that is labeled CAL > >One more thing, a small hole in the top that looks like you plug into that >is labeled FS ANT and is ~ .077" in diameter. > > >Sorry bout these Newbie questions: > >Could I use this meter to test my Becker Mode C Transponder and Com.? > >What settings and scale would I use and what am I looking for? > >If this is unusable, any recommendations on what would be a good tool for >the job? > >Thx. >Ron Parigoris > >


    Message 14


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    Time: 10:59:17 AM PST US
    Subject: Re: Is garbage picked SWR meter useful?
    From: "Matt Prather" <mprather@spro.net>
    I believe that SWR meter was designed for CB frequency - something around 10meter band ~30MHz. Your com is VHF, around 118-136MHz. The meter won't be very accurate at giving absolute SWR readings in the VHF band, but should be able to tell you some information about relative feedline/antenna efficiency. Lower readings are better. "1" is ideal. The transponder runs closer to 1GHz frequency range. Your meter will be even less efficient in that band. Plus, the meter is designed to work with the transmitter putting out power continuously. With the comm you can force that condition just be holding down the PTT key. On a transponder that would be tougher to accomplish - probably requires a test harness. I think what you need is an antenna tester designed for the proper frequency range. Something like this would work for the comm: http://www.mfjenterprises.com/products.php?prodid=MFJ-269 I believe you would need something more $ophi$ticated for testing the transponder. Probably something specifically designed for testing transponders would be the most cost effective. Your meter probably has PL-259 connectors on it... http://www.seed-solutions.com/gregordy/images/pl259n01.jpg They can be attached to RG-58 cable and that can be connected to BNC fittings.. Regards, Matt- > > I acquired form a garbage pick (Ham gave it to me some years back) a > Micronta Field Strength / SWR Tester > > On bottom it says MFGed for Rat Shack with a CAT# 21-525B > > The connectors in the backfor ANT and TRANS have a serrated crown, are > 610" in diameter and the center hole looks like it takes a pin .150" in > diameter. > > The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL > > Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 > > There is a switch that has a setting for REF and FWD and an adjustable > knob that is labeled CAL > > One more thing, a small hole in the top that looks like you plug into that > is labeled FS ANT and is ~ .077" in diameter. > > > Sorry bout these Newbie questions: > > Could I use this meter to test my Becker Mode C Transponder and Com.? > > What settings and scale would I use and what am I looking for? > > If this is unusable, any recommendations on what would be a good tool for > the job? > > Thx. > Ron Parigoris > >


    Message 15


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    Time: 11:12:39 AM PST US
    From: luckymacy@comcast.net (lucky)
    Subject: Re: Is garbage picked SWR meter useful?
    Guess I should mention that from what I found a CB SWR was better than nothing for the VHF frequencies in aviation. You can get BNC to p259 adapters at radio shack for about $6 each. You'll probably need 2 of them. Secondly, though the absolute value read on the meter won't likely be "actual" value, the trend will still be reliable. In otherwords, if you have a real bad connector and are getting a lot of reflection, the meter isn't going to move much towards the1.0 value on the meter regardless of whether it's a CB band SWR or VHF fre SWR. If it's a really good antenna "system" the meter will move towards 1.0 anyway regardless of meter type even if it's not an "exact" correct value. lucky -------------- Original message -------------- From: luckymacy@comcast.net (lucky) http://www.flycom.co.uk/antenna_swr.htm http://www.bellscb.com/cb_radio_hobby/swr.html lucky -------------- Original message -------------- From: <rparigor@SUFFOLK.LIB.NY.US> > > I acquired form a garbage pick (Ham gave it to me some years back) a > Micronta Field Strength / SWR Tester > > On bottom it says MFGed for Rat Shack with a CAT# 21-525B > > The connectors in the backfor ANT and TRANS have a serrated crown, are > 610" in diameter and the center hole looks like it takes a pin .150" in > diameter. > > The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL > > Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 > > There is a switch that has a setting for REF and FWD and an adjustable > knob that is labeled CAL > > One more t hing, AeroEl <html><body> <DIV>Guess I should mention that from what I found a CB SWR was better than nothing for the VHF frequencies in aviation.&nbsp; You can get BNC to p259 adapters at radio shack for about $6 each.&nbsp; You'll probably need 2 of them.&nbsp; Secondly, though the absolute value read on the meter won't likely be "actual" value, the trend will still be reliable.&nbsp; In otherwords, if you have a real bad connector and are getting a lot of reflection, the meter isn't going to move much towards the1.0 value on the meter regardless of whether it's a CB band SWR or VHF fre SWR.&nbsp; If it's a really good antenna "system" the meter will move towards 1.0 anyway regardless of meter type even if it's not an "exact" correct value.</DIV> <DIV>&nbsp;</DIV> <DIV>lucky</DIV> <DIV>&nbsp;</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: luckymacy@comcast.net (lucky) <BR> <DIV>&nbsp;</DIV> <DIV><A href="http://www.flycom.co.uk/antenna_swr.htm">http://www.flycom.co.uk/antenna_swr.htm</A></DIV> <DIV><A href="http://www.bellscb.com/cb_radio_hobby/swr.html">http://www.bellscb.com/cb_radio_hobby/swr.html</A></DIV> <DIV>&nbsp;</DIV> <DIV>lucky</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: &lt;rparigor@SUFFOLK.LIB.NY.US&gt; <BR><BR>&gt; --&gt; AeroElectric-List message posted by: <RPARIGOR@SUFFOLK.LIB.NY.US><BR>&gt; <BR>&gt; I acquired form a garbage pick (Ham gave it to me some years back) a <BR>&gt; Micronta Field Strength / SWR Tester <BR>&gt; <BR>&gt; On bottom it says MFGed for Rat Shack with a CAT# 21-525B <BR>&gt; <BR>&gt; The connectors in the backfor ANT and TRANS have a serrated crown, are <BR>&gt; 610" in diameter and the center hole looks like it takes a pin .150" in <BR>&gt; diameter. <BR>&gt; <BR>&gt; The SWR goes from 1 to 3 and a red area from bout 3 to 4 that says CAL <BR>&gt; <BR>&gt; Also below that scale is a scale (%)REF POWER and ranges from 0 to 5 <BR>&gt; <BR>&gt; There is a switch that has a setting for REF and FWD and an adjustable <BR>&gt; knob that is labeled CAL <BR>&gt; <BR>&gt; One more t hing, AeroEl <PRE><B><FONT face="courier new,courier" color=#000000 size=2> </B></FONT></PRE></BLOCKQUOTE></BLOCKQUOTE> <pre><b><font size=2 color="#000000" face="courier new,courier"> </b></font></pre></body></html>


    Message 16


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    Time: 11:34:46 AM PST US
    Subject: Re: Is garbage picked SWR meter useful?
    From: <rparigor@SUFFOLK.LIB.NY.US>
    Hello Bill Thx. for the reply. "Tell us what kind of "testing" you had in mind." Testing would be to find optimum antenna location and or wire routing to make radios function best. Vertex Handheld VX700 driven by a Advanced Aircraft bent in half (or not)(that is one of the tests) Becker Com driven by a Bob Archer antenna in top of tail, need to test locations and orientations and play with bending part of the top swept back a little for an easier fit Becker 250 watt mode C transponder driven by a Advanced Aircraft antenna, want to fool with location (pitch tube and cables) It would be very nice to see how all 3 antenna is propagate signal, somehow walk around and see just how much that motor and gear is blanketing?? Ron Parigoris


    Message 17


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    Time: 11:39:09 AM PST US
    From: <gmcjetpilot@yahoo.com>
    Subject: Re: IR alternators in airplanes (JUST say NO to OV
    relays) >From: john@ballofshame.com > >External OV protection with an external regulator is solid state. >When the crowbar trips, the field is grounded, thus driving the >alternator output to 0. The fact that the field circuit breaker pops >some time later is beside the point. If you wanted to you could >wire the the field with a massive bus bar and leave the circuit >breaker out completely. The field wire will be at 0 potential going >into the regulator because it's grounded. Of course, doing this >would destroy your battery in short order. > >Putting OV protection on internal regulators requires the relay >to work and is much kludgier. Though the module might be the >same, they function COMPLETELY differently and shouldn't be >confused. > >-John >www.ballofshame.com John I'm aware how the OV relay / crow bar combo works on an I-VR, and I know how a crow bar works on an E-VR. Yes, they are different. With the E-VR you kill the FIELD. Great! I understand you think the crow bar will short the field to ground. Well from what I've seen it removes power to the VR that collapses the FIELD. It depends how you wire the crow bar, and according to Bob's schematics the crow bar goes right on the CB not the field terminal of the VR. Whether it shorts the field or shorts the CB removing power to the FIELD, it's no matter; the real key is the alternator FIELD collapses and power is not produced by the alternator. On the "Kludgier" OV relay for a I-VR, I agree it works different and is a "Kludgier". That is my point. You make a point I've made many times, I-VR and E-VR are completely different and should not be confused. Trying to use OLD technology originally made for E-VR, like the OV relay, is not the way to go today. Bob's new module will open an OV relay by removing power to the relay. It may be an improvement to the original crow bar, which was kind of unstable, but the concept is the same, a BIG OLD OV RELAY. My point is LEAVE the I-VR alternator alone and don't mess with it. Wire it properly and operate it properly. If you can't stand it and are in fear of OV do something else. The best on the market for I-VR are the Plane Power units, where the I-VR has an integrated OV module that does turn the power off to the VR and FIELD, verses an OV relay which just cuts the out put with the FIELD still energized. It should give peace of mind to those who are afraid of OV. It does it elegantly with out a BIG OV RELAY. John I basically agree with everything you said, but a typical E-VR is stuck in the 70's. The $10 Ford alternator people use has about 3 transistors and a diode voltage reference. Yes it is solid state but OLD solid state. Even the B&C LR3C that sells for $230 is really a three transistor old design. It does have a crow bar in it, but that crow bar is an old idea. The new stuff has solid state power switching. Short circuiting CB's to trip/short them internally to remove power to the FIELD (or shorting the field as you like) is really NOT the way to go in the year 2000's. I-VR's have more technology and have been the focus of technological improvement, since most small alternators made since the early 80's are all internally regulated. If you are tempted to add a OV relay for peace of mind consider NOT doing it, and if you really are worried, get a Plane Power unit. If you do have an E-VR alternator the $70 Transpo V1200 is a modern E-VR that uses technology that I-VR's have, as well as OV protection. With the Transpo V1200, an OV condition is shut down by removing power to the FIELD. It does not short anything to ground like a crow bar. Cheers George --------------------------------- Now that's room service! Choose from over 150,000 hotels in 45,000 destinations on Yahoo! Travel to find your fit.


    Message 18


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    Time: 04:18:03 PM PST US
    From: "Rodney Dunham" <rdunhamtn@hotmail.com>
    Subject: Solder tab connectors
    Greg, Try this link... www.aeroelectric.com/articles/Jack_Tab_Soldering/Jack_Tab_Soldering.html Rod DO NOT ARCHIVE _________________________________________________________________ FREE online classifieds from Windows Live Expo buy and sell with people you know


    Message 19


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    Time: 05:19:49 PM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: Solder tab connectors
    At 12:10 PM 1/26/2007 -0600, you wrote: >I find myself with a raft of switches that have solder tab connectors (no >fastons available) and must confess to ignorance of the accepted wiring >technique for them. The only picture book I could find was for a rotary >switch and that showed the wire soldered flat to the tab without any >mechanical connection thru the hole. Is this the norm for all solder tabs >or just due to the nature of the rotary switch? Depends on who is defining "norm" . . . There are many a folk who would roll their eyes and pronounce the speaker short on sanity for suggesting that wires be "tacked" into place with solder. But skillfully lapped joints are done every day and produce conductors that run the lifetime of the vehicle. See: Go to my homepage and do a search on "solder sleeve". You'll get 7 hits on articles that discuss the joining of wires with nothing more than lapped, tack-soldered joints covered with heat shrink. See also . . . http://aeroelectric.com/articles/Solder_Lap_Splicing/Solder_Lap_Splices.html > If a mechanical connection before soldering is desirable I can envision > several ways of doing it and have probably used them all on the > occasional connector I've encountered in the past. This time I have a > panel full of them and would like to make it as neat and tidy as > possible. Is there a best or accepted method or does it not really matter > in our applications? Thanks. I would stick the stripped wire through the hole and solder it without "hooking" the wire onto the terminal. This is done for one good reason only . . . ease of repair. When it comes time to replace a switch, heat the joint and the wire comes right out . . . stripped, tinned and ready for installation on the new switch. Of course the finished joints will enjoy the benefits of one to two layers of heat shrink . . . and this is true whether you make joints that are easy to open later . . . or difficult. Find some 63/37 solder. Just about anyone who bothers to even offer such a finely tuned ratio will be a good source. http://www.action-electronics.com/kester.htm Bob . . . ---------------------------------------- ( IF one aspires to be "world class", ) ( what ever you do must be exercised ) ( EVERY day . . . ) ( R. L. Nuckolls III ) ----------------------------------------


    Message 20


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    Time: 05:20:26 PM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Solder tab connectors
    At 07:12 PM 1/26/2007 -0500, you wrote: ><rdunhamtn@hotmail.com> > >Greg, > >Try this link... > >www.aeroelectric.com/articles/Jack_Tab_Soldering/Jack_Tab_Soldering.html > >Rod Yeah, this one works too . . . just harder to replace. Leave some service loop wire at the end . . . say 2" extra or so such that a damaged or worn jack can be simply cut off and there's enough slack to install a new jack. Bob . . .


    Message 21


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    Time: 06:52:50 PM PST US
    From: "Terry Miles" <terrence_miles@hotmail.com>
    Subject: Ohm drop for welder's cable
    Thank you, Bob. I have #2. I have a Velocity I am wiring and decided to follow your suggestion in Chapter 7 on using my long run of #2awg starter (+) wire as my charge wire too. Thanks for that. I am figuring a 1.5 v drop for 300 amps in a 2awg wire running about 30 feet. I am using a Skytec LS starter. They told me to have 10v at the starter and I am using their figures for the 300amps. Regards, Terry -----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, January 26, 2007 10:16 AM Subject: Re: AeroElectric-List: Ohm drop for welder's cable <nuckollsr@cox.net> At 09:40 AM 1/26/2007 -0500, you wrote: ><terrence_miles@hotmail.com> > > >Does anybody know the ohm drop per 1000 feet for welder's cable? Or failing >that number....is welders cable likely to have more (or have less) line >resistance than Tefzel 2awg would have? Assuming that the manufacturer of any kind of wire understands the various standards for specifying the makeup and performance of wire, then you're on solid ground to compare the resistance values of anyone's 2AWG, 4AWG etc wire irrespective of type or intended use. You used the phrase "welders cable" . . . know that it comes in a variety of sizes including 0, 2, 4 and 6AWG. If you purchase 2AWG welding cable, it's a fair bet that the resistance is the same as M22759 2AWG cable. Bob . . .




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