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In Reply to: Re: who invented the circlotron posted by Lew on March 28, 2001 at 07:24:51:
The name 'Circlotron' has always looked like a trade name to me. The most commonly known mention is in the Sams Audiocyclopedia.However there is an earlier patent in the US, granted to Cecil Hall in in March of either 1954 or '55. Obviously the application was made earlier then that, but the amplifier described is an OTL using the circlotron-style bridge output. It differs in that the driver circuit runs off of the same supply as each output tube does, but the basic concept is shown.
There is no question that the concept was trying to surface; many inventions seem to have been invented similtaneously in various parts of the world.
It hard to say why the idea didn't take off at the time. It may have been because the extra cost of the supplies was seen as too expensive for the marginal improvement that the Wiggins (transformer coupled) version represented. It took a while until the cost became worth the performance advantage for the circuit to become practical, plus I think that the idea was also largely forgotten.
BTW, we were just granted our second patent in the field of the circlotron, the circuitry of which is now in use in the MP-3 and MP-1.
-Ralph
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Follow Ups
- Re: who invented the circlotron - Ralph 12:34:40 03/29/01 (1)
- Re: who invented the circlotron - Travis 15:51:33 03/29/01 (0)
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