[Collins] 32V-1

[Dr. Gerald N. Johnson]

On Sun, 2007-12-16 at 17:59 -0500, jeremy-ca wrote:
> The 75A1 uses a common input transformer/coil on all bands. The secondary is 
> fed to the individual band coils.

A balun or what? Those weren't great days for broad band transformers?
Not something I find in the 75A2 schematic. I've not seen a schematic
for a 75A1. Can it be run without that RF transformer with just a bit of
mismatch? Or is that transformer a cause of mismatch with coax fed
antennas?
> 
> Bad DowKeys is one reason I switched to a regular open frame relay ages ago 
> for my boat anchors. If the VSWR is high up on 10M its easy enough to tune 
> out with a compression trimmer at low power, measure and then replace with a 
> 1KV mica or disc for up to several hundred watts.

I have stuff using ordinary clapper type relays up through 2 meters
without problems.
> 
> Carl
> KM1H
> 

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer