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In Reply to: RE: Atma-Sphere MA-1 posted by Cousin Billy on January 02, 2016 at 01:13:59
-That orange 0,1uF in series connected with 7,5 0hm power resistor forms output Zobel network which appear connected in parallel with amplifier output two terminals ,
-Those two 600 ohm power resistors are ground reference resistors for Circlotron OPS , and if they are not connected in proper way as is was originally from A-T manufacture your amp will make booom and fail !
-Further I think that those big Mundorf capacitors do not belong there ,
electrically maybe but physically don`t ,
- Personally I will never modified those great OTL amps in your way .
Happy New Year and all the best !
"Art which does not have the appearance of art is true art."
- Old Roman saying -
Edits: 01/04/16Follow Ups:
I hooked up an old driver, played some music, and no smoke.
Measured the chassis in a number of spots. Wanted to make sure I didn't have a 'leak' anywhere. Big smile on my face.
Can't wait for my CuTF's to arrive. Can't wait to finish my new speakers.
2016 is gonna be a great year.
Too bad the stock market is taking a hit.
If we look at the picture in the previous post.
My grey wire is coming off a tag strip. A green/yellow striped wire is running from there to the transformer. I think Ralph called this a 'ground' reference wire. It doesn't matter what it's called. There are obviously other wires coming to the tag strip. This all on one side.
Here's my question;
Is voltage 'coming' from the this tag strip, and into my capacitors?
Or is voltage 'going' to the tag strip?
Which direction is the voltage travelling through the HV supply caps?
Another technical question.
If these coupling caps connect the 'top of the differential cascode' (V2) to the 'driver tube' (V4), then the voltage travels from V2 to the driver tube V4. Yes?
Plate of the top tube in the dual-diff cascode to grid of the driver tube, yes. Where else could the signal voltage (AC) flow but from one node to the other? You might want to observe the directionality indicated by the color-coded leads of the Vcaps.
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