[Milsurplus] BC-348 Audio tube bias

Dennis DuVall duvallddennis at gmail.com
Sun Jan 17 17:47:10 EST 2016


Just make sure you do one the other.

Dennis D.  W7QHO
Glendale, CA

************
> On Jan 17, 2016, at 10:52 AM, John Watkins via Milsurplus <milsurplus at mailman.qth.net> wrote:
> 
> Almost finished sorting out and rewiring/removing old mods, etc.  I have an AC supply in the radio, and the B- is grounded.  The VT-152 (6K6) cathode would like to have a bit of negative bias to avoid distortion.  Read that it should be around -18V some where, and the B- is also ungrounded and connected to the VT-152 on the BC-348 schematics.  Should I just pull the B- off of ground, or put a resistor in the cathode of the VT-152 (6K6)?
> 
> thanks,
> 
> John WD5ENU 
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