[ARC5] BC-348 Question

[John Hutchins]

Wayne -
My version R
IMO possibly weak tubes 6BM8 and or 6F7 may play a part.
If the 6BM8 tube has a weak diode, not enough AVC voltage may be 
generated  to counter the strong SSB signal?
If the 6F7 is weak the Osc may not provide enough mixing signal strength?
I have found that in some cases I have to switch to MGC.
Hutch

On 5/3/2013 8:44 AM, Robert Eleazer wrote:
> I have been enjoying listening to an BC-348-N of late and found something interesting.
>
> When on AVC the BFO sometimes does not seem to be strong enough to resolve SSB.  Is especially obvious on 80M.  For the weaker signals, you can pick out SSB Okay, and on the higher bands it works better.  Now on MVC it all works Okay, on all bands; you can get SSB fine.
>
> Previously I had a problem with the BFO on this same receiver and "eventually" replaced the associated tube, which fixed it.
>
> Anybody have an idea what is going on?
>
> Thanks,
>
> Wayne
>
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