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In Reply to: RE: what am I missing? posted by vinnie2 on September 14, 2014 at 09:25:03
More often than not pentodes and beam tetrodes are graphically represented as tetrodes.This means that the "uppermost" grid is g2, because g3 is not represented in the symbol.
The reason for this is that in most pentode and beam tetrode tubes g3 (or the beam former in beam tetrodes) is internally connected to the cathode, and does not have it's own pin.
Basically, you can only make 2 choices here:
1)connect g2 to the anode, which will create a "triode mode" connection,
2)connect g3 to the anode, which means you will connect the cathode of the tube directly to the anode, bypassing the tube itself...The latter will most probably blow a fuse, provided you have installed one...
My father used to say that with electricity you can only make one mistake. Be careful!
*******
http://rh-amps.blogspot.com/
Edits: 09/14/14Follow Ups:
You had it right Alex. I did it like you suggested and it works fine. I am surprised at how good it sounds too! But then it is such a simple design the sound depends on the tube and I have always liked the sound of a 6bq5.
Going to have to put the other channel together and plus up the psu. I do believe this little amp has possibilities with my Altec Granada's.
Thanks for the help!
Thank you Alex, for a answer that I can understand and that answers my question. I will be careful believe me.
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