Topband: Noise from Control Voltage on K9AY Loop

[Pete Smith]

Happy to report a cure for my problem, thanks to N4GG (thanks as well to 
everyone else who offered suggestions).

The magic turned out to be an added RF choke at thre antenna end between 
the relays and the RF path - all I had was 100 uH, but it did the trick, 
even on 160.  Directivity appears to be as advertised - a broad front lobe 
and a fairly deep null to the rear.  It is a lot quieter than my 
transmitting vertical on 160, but it remains to be seen how well it will 
hear DX... once the sun sets!

73, Pete N4ZR
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