[ARC5] Bias Battery

[Richard Knoppow]

   One can use any type of cell for bias but mercury cells had 
the advantage of very long life under light load and very 
constant voltage. They are 1.35 volts per cell. Alkaline or 
carbon/zinc cells are about 1.5 volts per cell but do not last 
nearly as long as mercury cells. The problem, of course, is that 
mercury cells are  no longer available because they are an 
environmental hazard. Other kinds of cells will replace them, 
with sometimes some juggling, but nothing else has quite the same 
properties. Bias batteries have the advantage of not dropping the 
B+ like a cathode resistor and constant voltage.


On 2/4/2020 3:32 PM, Robert Eleazer wrote:
> I took a look ath the receiver section of a GRC-9.  That set 
> uses a 4.5 volt bias battery, with the positive side hooked to 
> chassis ground.  It was comprised of three "button" cells in 
> series, so I assume they were 1.5 VDC each.
>
> Wayne
> WB5WSV
>

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL