[ARC5] Bias cell voltage/s

[Roy Morgan]

See
Philcorepairbench.com/ biascell. html

Antique radios. com has information. 

Apparently 1.2 volts no load (dmm or vtvm). Includes rejuvenation methods. 

Suggested is to use watch battery. (Careful of polarity!)

Careful study of tube characteristics graphs may reveal expected changes in tube plate current. 

Roy Morgan
K1LKY Western Mass

> On Feb 2, 2020, at 7:02 PM, John Allen via ARC5 <arc5 at mailman.qth.net> wrote:
> 
> 
> Group,
> Could anyone tell me the voltage of bias cells that were used in some late '30 and early '40 radios. 
> As a kid I saw them advertised in radio catalogues, specified for use when no current was being drawn from them, such as grid bias. I have several farm radios that these for control grid bias in first audio stage . 
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