I am assuming you are thinking about a cthode biased amp? With fixed bias,
there are other complexities besides just killing the tubes Personally, I
wouldn't go there...
I suppose you could lift the heaters to kill the tubes, but more
frequently,
I have seen circuits that lift the cathodes. For example, in a 4 tube amp,
lifting the cathodes of two of the tubes is sometimes used as a half power
switch. This approach does imply that your PT can handle all 4 tubes with
respect to heater current though, where as yours dodges that requirement.
As others have said, don't do this with the amp live.
"JD" <b24warbaby@[EMAIL PROTECTED]
> wrote in message
news:47eaee67$0$4039$bbae4d71@[EMAIL PROTECTED]
> If I wanted to share a platform
> between these two tubes for a 18TMB
> would it be feasible to wire the two
> PP circuits in parallel , then have
> a DPDT switch that would apply heaters
> to one or the other ?
>
> Without heaters .. would the related circuit
> essentially disappear ?
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