[Milsurplus] ARB Antenna capacitor

[Mike Hanz]

Further musing about this add-on cap reminded me that somewhere in the 
junk boxes is another version of this series capacitor that doesn't need 
getting into the ARB so much - it is a small square 1/8" thick phenolic 
board with two solder terminals riveted on one side and a hole for a 
push post on the other.  The two solder terminals have some hefty (#12 
or so) bare tinned wire coming out parallel to the board surface and 
intended to plug into the two existing push posts on the ARB. There is a 
smallish mica cap mounted on the rear of the board between the upper 
solder terminal and the new antenna push post...I don't recall its value.

Oh, and I meant to write *MHF* receiver below, not the MF navigation 
receiver.

On 12/8/2013 5:07 PM, Mike Hanz wrote:
> On 12/8/2013 3:46 PM, Hue Miller wrote:
>> http://www.ebay.com/itm/WW-II-NAVY-AIRCRAFT-RADIO-RECEIVER-TYPE-CRV-46151-HAM-RADIO/251398161407 
>>
>>
>> Which is fair condition ARB with local tuning crank, with spinner 
>> post broken off.
>> But what interests me is the large mica cap attached where the 
>> antenna connector
>> should be.
>> In  the past I have seen one out here on the opposite coast with 
>> exactly the same
>> type capacitor in the same position. So was this in place merely to 
>> replace a broken-off
>> antenna connector, or is there some more arcane purpose to it?
>
> It's a standard part of the expanded AN/ARC-5 system, Hue, probably 
> standard with other multi-receiver installations as well.  Go to pages 
> 249/250 and 251/252 of the AN/ARC-5 manual and you'll see it called 
> out as Item 57, 36uuF, 1,000v mica capacitor leading to the receiver 
> antenna post of the ATC (ART-13) transmitter.  I would suspect that it 
> may have more to do with suppressing local oscillator signal 
> interference from the MF ARC-5 receiver than anything.
>
>            73,
>  - Mike  KC4TOS