[Milsurplus] RCH Receiver

[David Stinson]

----- Original Message ----- 
From: "Robert Nickels" <w9ran at oneradio.net


>.......  However, contrary to your 
> very logical observation above, the audio bleed-thru is still quite 
> loud, and is unchanged even with a clip lead from the  grid of the first 
> audio tube directly to ground.  In fact, audio can still be heard, 
> although lower in volume and with distortion, when the 6SQ7 first audio 
> tube is removed from its socket!

Put a scope on your B+ lead and screen leads.
See if there is audio impressed on the power supply busses.
If so, find your open bypass.

73 Dave S.