[Milsurplus] ARC-5 Transmitter Crystals

[Mike Hanz]

The 'standard' crystal freqs for the ARC-5 sets are listed in the ARC-5 
transmitter section of my web page - 
http://members.cox.net/aafradio/flightdeck/flightdeck.htm - but they are 
not the only ones that were produced.  Next to the T-15 in the top row 
is an O-4/ARC-5 oscillator that was used to spot tune the stabilized 
receivers, and there are probably dozens of crystals used with that set, 
though they are pretty difficult to find today.   I think I only have a 
dozen or so of the oddballs.  None at 3885, darn it...

I suspect there was a lot of crystal swapping between the three versions 
of the command transmitters "back in the day"....

All the ARC-5's I've seen are black wrinkle except the VHF sets, which 
were actually Signal Corps designs produced under the rubric of "joint" 
radios...hah!  Somewhere in the archives I have a photo of water 
dripping on an ARC-5 set - on a Navy carrier flight deck at sea, so it's 
salt water.  I think that's why the Navy insisted on paint of some sort 
on most of their aircraft equipment (or heavily anodized aluminum, as in 
the RL-24 interphone set.)

73,
Mike

WA5CAB at cs.com wrote:

>If I've ever seen an actual list, I've forgotten it.  But my impression has 
>always been that they were single point references for a quick reset after for 
>example a tube change.  The holder is generally marked DC-8-(*).  For the 
>4.0-5.3 and 5.3-7.0 transmitters, I've seen (had) two different frequencies each.  
>For the other three common ones, only one.  I don't know about the three 
>lowest frequency MF ones.  The AN/ARC-5 maintenance manual's parts list just says 
>to specify the desired frequency when ordering.
>
>In a message dated 10/28/2004 9:42:14 PM Central Daylight Time, jfor at quik.com 
>writes: 
>
>>Does anyone know how many frequencies of crystals there were for the ARC-5
>>transmitters? Is there a list of the standard ones somewhere? My impression 
>>is
>>that they were used as spot calibrators, rather than for specific channels, 
>>but
>>that's only an impression.
>>
>>
>
>Robert Downs - Houston
><http://www.wa5cab.com> (Web Store)
><wa5cab at cs.com> (Primary email)
><wa5cab at houston.rr.com> (Backup email)
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