[ARC5] Phantom Antenna A-61-A (#7777)

[WA5CAB at cs.com]

Ray,

According to Figure 34 page 149 of T.O. 08-10-50 (and later), A-61-A 
consists of 100 MMF in series with 5 Ohms in series with an RF Ammeter.  No 
further details seem to be given.

Does anyone have a copy of any version of the SCR-274-N manual that 
contains Figure 33 Page 147?  Would show Test Set RC-54-A, the Receiver Test Set.

In a message dated 04/08/2016 01:04:27 AM Central Daylight Time, 
robinson at tuberadio.com writes: 
> Hi there,
> 
> My A-61-A Phantom antenna has been got at.
> 
> It did not seem to work correctly, so I opened it up,
> and found it had been converted to 50 ohms.
> The series resistor had been rewired for 20 ohms.
> It is just several 2 ohm resistors in series/parallel
> so it was easy  to put it back to the original 5 ohms.
> 
> There are 2 clips which had a 30 ohm resistor clipped in.
> It was removed.
> What is the capacitor that goes in here?
> I assume is it a 100 pf vacumn capacitor
> similar to the 50 pf in the antenna relay.
> The 50 pf is too short (3.35 inches long).
> It seems to need a 4.5 inch long capacitor,
> of 100 pf.
> 
> Is this reasoning correct?
> 
> Regards
> Ray
> 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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