cascade driver stage

OTL Asylum

OTL, Output Transformerless Amplifier User Group.

Just to stir things up, I wonder whether the factory or any of the more adventurous DIYers has thought about using a cascade (two differential amplifiers in series) as a circlotron driver stage, instead of the standard cascode/cathode-follower set-up? In my imagination, the cascaded sections could be DC coupled, and the downstream dual-differential amplifier stage would have to be AC coupled to the circlotron. Advantage: no cascode and no CF, for those who are biased against same. Disadvantages: higher output impedance for the driver stage and use of 2 discrete gain stages, instead of the cascode (although one could fairly argue that the cascode itself has two gain stages). But am I missing something? Would it work at all? The bias for the circlotron stage would have to be applied at the grids of the output tubes, but that seems a possibility.

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Topic - cascade driver stage - Lew 08:47:46 12/07/01 (11)

Re: cascade driver stage - Kevin 05:05:52 12/08/01 (7)

Re: cascade driver stage - Paul Speltz 15:18:06 12/10/01 (0)

Re: cascade driver stage - Lew 07:15:33 12/10/01 (5)

Re: cascade driver stage - Kevin 14:17:34 12/10/01 (2)

bias scheme - Lew 10:33:53 12/11/01 (1)

Re: bias scheme - Kevin 14:38:26 12/11/01 (0)

Re: cascade driver stage - Ralph 08:53:29 12/10/01 (1)

Re: cascade driver stage - Lew 10:12:02 12/10/01 (0)

Re: cascade driver stage - Ralph 10:58:55 12/07/01 (0)

Re: cascade driver stage - Paul Speltz 10:51:36 12/07/01 (1)

Ralph and Paul - Lew 11:18:00 12/07/01 (0)

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