[ARC5] Ceramic Beads

[Glenn Little WB4UIV]

This company appears to have W-106-A:

  http://catalog.standard-wire.com/item/mil-spec-products/enna-wire-mil-w-6370c-mil-dtl-25136-mil-dtl-12995-/pn-2553

73
Glenn
WB4UIV

On 5/23/2018 10:49 PM, Craig wrote:
> Hi Mike: Thanks for the diameter info, as I couldn't remember what it 
> was. As to the number of beads, the book calls out a quantity of 450 
> of them. The AT ran a two transmitter, three receiver set up. Where 
> the extra length comes into play, is that both transmit lead are 
> routed differently to the BC-442.
>
> The next trick is finding some W-106-A antenna wire in bulk.
>
>
> Craig
>
> KF5JOT
>
> Fairchild AT-21-BA
>
>
> On 05/23/2018 05:31 PM, Michael Hanz wrote:
>> They are IN-83 beads, Craig.  From my web page on insulators 
>> (http://aafradio.org/docs/aircraft_antenna_insulators.html ):
>>
>> IN-83 is a Signal Corps designation, and is 5/16" in diameter, 48 
>> beads per foot, which is about 1/4" long nested in the next bead.
>>
>> Man, 500 seems a lot for an aircraft the size of the AT-21, but I'm 
>> sure you've done the measurements.  Even with the two ART-13's in the 
>> Enola Gay, I don't think we had more than maybe 7-8 feet. They 
>> designed the runs to get the RF out of the shack and through the 
>> fuselage as directly as possible.  I'm assuming you are just using 
>> them for the Liason transmitter.
>>
>>   Hope that helps,
>>  - Mike  KC4TOS
>>
>
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-- 
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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"