[ARC5] Bias cell voltage/s

[Richard Knoppow]

    These were mercury cells. A single cell is about 1.35V Some 
bias batteries were stacks of single cells. The advantage of 
mercury cells is that the voltage is very constant with age and 
exhaustion. I believe they are also quiet. For other kinds of 
cells or batteries its sometimes a good idea to use bypass 
capacitors to reduced noise.

On 2/2/2020 4:00 PM, John Allen via ARC5 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 . I need to know their voltage to 
> restore these sets.
> Thanks in advance,
> John Allen, W4GQT since 1959
>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL