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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Mu vs cathode follower posted by Frihed89 on July 22, 2006 at 06:14:07:
The CF is said to be non-linear at certain parts of in its operation. This is explained and shown in the text on Tube Amplifiers (or similar title) by Valley and Wollman, but I cannot repeat the argument chapter and verse. Using a constant current source in the cathode of a CF goes a long way to linearize the operation and improve the sound in my personal experience. If you want more, Allen Wright has touted a souped up version of the CF, which he calls a "Super Linear Cathode Follower" (SLCF). He explains how to build it in his "Preamp Cookbook". He not only uses a CCS in the cathode but also a constant voltage source on the anode side. A highly skilled friend of mine built it into a driver stage for an amplifier and likes it very much. As for the mu follower, it was the cat's meow for a while. I did not particularly care for it in the context of a preamp using 6SN7s. I thought the SRPP that Poinz mentions was out of favor with the cognoscenti. Glad to see he likes it, because I have liked it too, as a voltage amplifier stage in an amplifier (not too different from a preamp linestage).
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Follow Ups
- Re: Mu vs cathode follower - Lew 13:32:41 07/24/06 (1)
- Thanks - Frihed89 13:51:28 07/25/06 (0)
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