| 
>
>Some time ago I happened to own a Swedish Radio marine transmitter running 2
>x QB4/1100 tubes
>where the filament voltage was lowered to approx. half in the stand by
>position. 
This approach work ok for filament-type cathodes.  For heater-type 
cathodes, it sounds risky to me.  
- later, Harald
-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end
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