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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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PostPosted: 26 Jul 2017, 06:58 
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Joined: 26 Jul 2017, 06:46
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Can the OddWatt - ECC802S SRPP / EL84 (6BQ5) Push-Pull Tube be used to drive a ESL after disconnecting the output transformer and connecting the two anode of the push pull tubes to the ESL plates

tjjohn


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PostPosted: 26 Jul 2017, 21:05 
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Joined: 04 Jun 2008, 20:59
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Location: Arizona, USA
Hi, A question that makes you think. However the answer is no. The ESL panels are like capacitors and do not pass DC current so there is no way to get the current through to the tubes. Now for the other possibility. If the ESL is driven by a step up transformer then it might be possible to use it if it has a center tap. Beware you may fry it in the process. Even if it works the response is unpredictable. Another concern is that ESLs tend to need a high voltage that is way in excess of what the tubes would take. My ESLs use about 2000 VDC. My personal sense is to get the proper output transformer and leave well enough alone. BTW the 6BQ5 version is not likely to be powerful enough. I find the KT88 version preferable and even the KT77/EL34 versions to be pretty suitable. But this is based on Martin Logan ESLs, Quads and others need more muscle and even the KT120 version might not be enough for some folks.

Good listening
Bruce

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PostPosted: 26 Jul 2017, 22:10 
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Joined: 26 Jul 2017, 06:46
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Hello Bruce,

I think you have answered my question completely. Thank you for the answer and the additional suggestions.

Best

tjjohn


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