[Amps] GU-84B Conversion (Re-thought)

[Gudguyham at aol.com]

In a message dated 4/13/2011 8:22:42 P.M. Eastern Daylight Time,  
km1h at jeremy.mv.com writes:

If you  can find PL-175A's they will equal a 3-500Z watt for  watt..


Carl, I know you have a few years on me, so when I came on the scene the  
3-500's were so popular that the PL-175A tubes were history by then. Sure, I  
have tried 4-400's in place of 3-500's so I know that they work OK in GG 
with a  little less gain.  I have never tried a PL-175.   As I recall  didn't 
Hallicrafters make an amp with that tube?  I looked up the 175 and  it seems 
it is a tetrode.  When you mentioned it before, did you mean "watt  for 
watt" in GG or AB1?