I'm busy working on a layout (just one tube) for a 6N3P-E based hybrid preamp with feedback (horrors!), run by a little Antek toroid with a 150V HV regulator of my own design using a 500V p-channel mosfet I nabbed from Electronic Goldmine. I'll be using the ZVP2120GTA p-channel mosfet (SOT-223 SM package) from Diodes, Inc., as it has lower gate capacitance than the IRF9610 mosfets originally used in the design (zippier performance). Details will follow as I get the design worked out.
I originally posted this as an aside in the Salas 6V6 preamp thread, but the project has since acquired a life of its own, hence the separate thread.
I originally posted this as an aside in the Salas 6V6 preamp thread, but the project has since acquired a life of its own, hence the separate thread.
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Things will unfold - a schematic for the basic preamp first, then the schematic for the 150V regulator. I'm trying to figure out which box I'll use to mount the preamp, so porn will also follow.