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Old 29th April 2013, 06:18 AM   #1
diyAudio Member
Join Date: Nov 2011
Location: The Golden State

Hi All, Just need help in Evaluation to make this amplifier work!
What do you see that needs to be corrected? Are these values going to work?
and Will I be able to use these valves in this setting? Any Info would be Appreciated!
very much! The 500 ohm primary and 1 ohm secondary of the output transformer
I believe is a DC Resistance reading.... What about a 6A5G? Lydia
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Last edited by pianolydia; 29th April 2013 at 08:46 AM.
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Old 29th April 2013, 06:44 AM   #2
tricomp is offline tricomp  Denmark
diyAudio Member
Join Date: May 2004
Location: Jutland

Sorry to say that your schematic is so full of errors that it's not going to make any sense trying to explain here what you did wrong.
Some errors are so basic, that if you don't immediately see them, like the negative-supply rectifier being the wrong way around, I would suggest that you keep off 300V circuits.
It just takes a bit more knowledge to start messing around with tube-circuits.



Don't you find it odd that the two 6Y6 symbols are drawn differently?
One as a pentode and the other as a triode.
Since it is a pentode it's going to miss some screen-grid feed in your circuit.
Also read-up on what current a control-grid (Grid-1) should draw. 90mA is a bit much
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