[Boatanchors] [Milsurplus] OK Smart People- Back Bias

[J. Forster]

Battery holders for 2, 3, and 4 cells are available at Radio Shack or at
flea markets. The AA are most common.

-John

=========



> So long as you are only using it for grid bias, you can turn a 9V battery
> into a 6V one by opening up the bottom, turning one of the cells over, and
> re-sealing it.  Or you can make a 7.5V by replacing any cell with a length
> of
> brass rod.  You'll need to insulate the rod with shrink tubing.
>
> In a message dated 07/31/2012 12:09:44 PM Central Daylight Time,
> w7qho at aol.com writes:
>> Might  "work" in the sense that you'll hear something but won't
>> provide the required negative bias voltages.  Quick and dirty, would
>> recommend stacking up 5 AA cells to give you -7.5 volts bias for the
>> 1D8 grid and the AVC circuits.  Single 9 volt battery might work OK too.
>>
>> Dennis D.  W7QHO
>> Glendale, CA
>>
>> ************
>> On Jul 31, 2012, at 8:51 AM, David Stinson wrote:
>>
>> >I'd like to make a temporary "tacked-in" change so I can
>> >use a supply with B- grounded for a short time.
>> >Will 5-volt zeners connected this way work?
>> >
>> >http://home.netcom.com/~arc5/bias/zenerbias.jpg
>>
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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