TUBE STAR - 12V-50V tube overdrive

[therecordingart]

What are the current requirements from a 48v supply for the plates? I have a PSU for a mic preamp that should work for this.

[Renegadrian]

The plates need a few mA, as some other circuits around. It's the heaters that need more current, at least ½ A or better 1A to avoid any hiss/hum.

@ Govmnt_Lacky - there is not a FINAL version, as I tried all the options there - no gain, gain as interstage volume, gain at the first cathode a la Valvecaster, and swapping tubes (AT an AU) - All of them work! I like the cathode gain best, as it acts more like a SS gain regulation, while the interstage volume just cuts the amount of signal going to the second stage, it's a standard solution found in almost all amps/preamps but...maybe in this ckt you can go with the cathode gain.

[therecordingart]

Any sound samples of this?