A friend of mine led me onto a PS that i thought was innovative, and pretty bullet proof, it was basically a traditional zener stabilized supply, with the exception of a CCS feeding the zener string with an interesting low pass filter which fed the pass device, a Darlington pair, the output noise figure i obtained in spice was around 1nV/sq.rt.Hz at 50Hz! could that be??? So I decided to use the same arrangement using a feedback design, and came up with similar results. Please ignore component values, Im also using a 6080 instead of a 6L6GC, I will reveal those later if this thread goes anywhere.
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its doubtful you can get THAT much gain out of a single BJT and 6080 pass tubes. The bottom transistor is basically an error amplifier. You need to add a diode for short circuit protection, otherwise the charge left in the speed-up capacitor might damage your BJT.
A friend of mine used my EF184 boards and got 300uV @ 325V 50mA.
If you take a pentode like E83F or EF184 instead of that BJT VAS. and load it with a current source from the raw B+ you can get similar performance.
A vacuum tube based maida is also a good idea.
A friend of mine used my EF184 boards and got 300uV @ 325V 50mA.
If you take a pentode like E83F or EF184 instead of that BJT VAS. and load it with a current source from the raw B+ you can get similar performance.
A vacuum tube based maida is also a good idea.