[Milsurplus] Command set tubes

[Ian Wilson]

A 6K6 works fairly well if you don't want to rewire.

73, ian K3IMW

On Wed, Jul 21, 2010 at 9:48 AM, Bill Cromwell <wrcromwell at gmail.com> wrote:

> Hi,
>
> I have a pair of Q5er BC-453 receivers here. Both need recapping. I have
> to decide how I want to deal with the heater strings in these while the
> wiring is accessible. I have lots of 12 volt applications and so 12
> volts for the heaters is most easily available here. One suggestion has
> been replace the 12 volt tubes with 6 volt tubes and leave the wiring
> alone. I started looking at which 6 volt tubes to use and hit a snag
> right away with the 12A6 output tube. 6 volt substitutes that I can find
> draw far more current than the 6 volt substitutes for the other 12 volt
> tubes. I know how to add a resistor to futz with the voltages on each
> heater for that situation but why bother. Rewiring for parallel would be
> better. Does somebody here have suggestion or a place I can look for the
> suitable tubes to retain the series heater stings as-is for 12 volt
> operation? I think installing the right 6 volt tubes is my best solution
> with a parallel string in second place. Anybody?
>
> 73,
>
> Bill
>
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