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Tubes Asylum Questions about tubes and gear that glows. |
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Tubes Asylum Questions about tubes and gear that glows. |
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In Reply to: I believe you are speaking of the 3.3 ohm resistor where the posted by Michael Samra on June 25, 2012 at 20:13:11:
In the 8B it's 6.8Ω paralleled by 0.02µF. I doubt that a simple frequency sweep will reveal much of anything since I suspect the network has to do with either stability and/or response linearity into reactive loads. The 8B was advertised as unconditionally stable into any load with any signal and each output transformer was individually tweaked at the factory with a couple of trimmer caps in the feedback circuit to help assure this.
As far as trying different output tubes, I already stated that I tried NOS GEC KT77s and didn't care for them. I thought the Mullard/Amperex EL34s were best with the RFTs not far behind. RFTs are in there now. Based on this, I'm sticking with EL34 types, thank-you. YMMV.
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Follow Ups
- RE: I believe you are speaking of the 3.3 ohm resistor where the - Steve O 20:49:40 06/25/12 (1)
- RE: I believe you are speaking of the 3.3 ohm resistor where the - Michael Samra 21:13:17 06/25/12 (0)
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