[ARC5] BC-696-A Possibility?

[Mike Hanz]

On 4/27/2010 2:37 PM, J. Forster wrote:
> It was very neatly done and the T/R relay even looks fine. The question
> is, were any ever made with the SO-239's or are all the connectors a ham
> "conversion".

All ham conversions.

> Putting a coax on that antenna push-post makes little
> electrical sense.
>    

Precisely!  Especially when the feedpoint impedance looking back into 
the transmitter was on the order of 5 ohms and a conjugate inductive 
reflection of ~ 100pF antenna capacitance.  The design criteria was 
based on open wire through a fuselage insulator and the highly 
capacitive antenna began at the hull interface.  Total feeder length was 
typically 3-4 feet.  The "theoretically" right way to match it is a 
*short* open wire to a matching network (with a wide copper ground strap 
return to the chassis), then coax from the matching network, but hams 
have tried a lotta things over the years that were not theoretical 
ideals.... :-)

Best 73,
Mike  KC4TOS