[Amps] 3-400Z vs. 4-400A

[wwd@netheaven.com]

>>Some time ago a guy told me he was substituting the
>>4-400A tube in his Swan Mark 1 amplifier instead of
>>using the 3-400Z tube.  He had a large supply of the
>>4-400A tubes on hand and said they were working very
>>well in the Swan Mark 1 even though it was designed
>>around the 3-400Z tube.  Is this an ok thing to do in
>>the long term?
>>73,
>In g-g, at 0v bias, the 4-400A needs c. 3400V to idle at the requisite 
>75mA. 

>-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
>www.vcnet.com/measures.  

So add some bias already. <g>
-- 
wwd











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