[ARC5] ARC-5 TX output circuit modeling [long]

[WA5CAB at cs.com]

Jack,

I have one as well.  The A-58 belongs to SCR-193.  Like the phantom antennas 
supplied with several of the other ground vehicular sets, it was apparently 
intended to allow retuning the transmitter on a different channel without 
actually radiating a significant signal.  However, as few of them have surfaced, I 
would presume that it was not installed in vehicles like for example the A-62 
was.  Maybe each Battalion had one or something like that.

In a message dated 1/7/2007 7:19:17 PM Central Standard Time, 
scr287 at sbcglobal.net writes: 
> One of the things I've picked up in my
> travels is an Antenna A-58 (Phantom).
> 
> Anyone know what set it goes with?
> 
> Anyway it has 4 settings as follows:
> 
> 1    1000uuf   10 ohms    for 150-260 kc
> 2     285uuf   10 ohms    for 260-1500 kc
> 3     285uuf    5 ohms    for 1500-10000 kc
> 4      74uuf    5 ohms    for 10000-12500 kc
> 
> The circuit is series configuration, capacitor
> to resistor to ground.
> 
> The 12500 kc upper limit is the same as for the
> BC-191 and -375, so I would assume this went with
> one of the ground SCR sets.

Robert Downs - Houston
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