[f2a]

 Marry Christmas to all      One of the the best way in good  drive  is  push pull  .in these  circuits ; amp  can reject the hum  noise of power supply  better than the single ended topology . the noise  with  180    different  in  phase in two  final channel  …..  ;so you don’t need to big filter chock  .important  point is musical sound in single end and in push pull you are worry abut  result . we can  use the triode direct hitting  tube like 6b4g  and the sound …..please look to  my new amp  project with 6b4g .

[JohnR]

You are using 6BGs as the phase splitter? You must plenty of them

Nice looking project What are the other tubes?

[f2a]

Hi
Tanks ,I decided to see power of the 6b4g in parallel push pull .i used  the uk    6sn7 for phase splitter and one rca  6j5 before 6sn7 .  the 6j5 one of the best choice in these topology .this project  is tow mono block  of parallel push  pull 6b4g  and we cant see the pot  for gain  control  on these blocks .the feed bake used in any block only to control the value of mid in sound .in these kind of triode direct hating tube you should tinkling abut the separate  filament power supply .in Maine power supply we have the Dobell c core trans  and 5ar4 rectifier from Siemens. Power tubs works in fixed bias in 91 dc voltage .out put transformer is hashimito  from Japan.

[f2a]

i have 170 of nos zaerix 6b4g and 16 of mix usa 6b4g  tube box   :|the sound  is too nice  .  I cant explain abut the nice bass  in this  push pull  amp .i want to make one same project with  rca 2a3  .i  need just 2 days for finish these project because I have transformer and tubes  ond other parts in my  box .

[JohnR]

Hi, thanks for clarifying! I'm not sure where I got the idea that you were using the 6b4 as phase splitter My bad. But you do have a plentiful supply! Is that OPT around a 3k primary then?

[f2a]

I used the out put transformer from au111 Sansui tube amp .every body can order new type from hashimito  by 600 $ . power supply is important point  in project .for best sound I used German  Siemens 5ar4   rectifier  (maybe amperex   original made ).another the filament providing current . I made single ended 6b4g  that sound was nice too.  If you want the grate sound  in your lessening room I promised you that the 6b4g is   good chose  .