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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: As a point of historical fact posted by Dan Banquer on July 18, 2006 at 18:16:25:
Hi Dan
In another post, I forgot to mention another “thing†about Mac transformers.
Inside of the normal E,I laminations, these are made with a C core which is tape wound then cut into two halves which mate precisely together. There are two bobbin’s of wire, one of each leg of the C. After the bobbin’s are slipped on the legs of the core, is is banded together, squashing the two ends of the core (which were surface ground) together. That whole thing is potted in a can, bigger, more expensive than most..
A really neat feature of the double bridge output Mac used was that any DC asymmetry in the output stage (like from different tube gains) was precisely canceled out in the transformer.
As a result, the transformer core could not be subjected to DC flux even with a really sick or off biased output tube, pretty slick and something the Circlotron topology does not have.Tom
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Follow Ups
- Re: As a point of historical fact - tomservo 15:11:25 07/19/06 (1)
- This points out an interesting potential form of distortion unique to most tube amplifiers - Soundmind 17:47:57 07/19/06 (0)
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