Hamptone pre.

[Hasse]

 

[pucho812]

schematics are unavailable.

 

[rock soderstrom]

Tube Mic Preamp

 

[rock soderstrom]

JFet Mic Preamp

 

[rock soderstrom]

Tube Pre PSU HT

 

[rock soderstrom]

Tube Pre Filament and Phantom PSU

 

[rock soderstrom]

Input Pad

 

[rock soderstrom]

Hamptone Tube Mic Pre article at tape op magazine

http://tapeop.com/tutorials/30/build-tube-mic-pre/

 

[peterc]

Here are my saved docs for the J-Fet preamp  PCBs . All 3 docs in one PDF..

 

[wutty]

Input Pad

Use potentiometer or knob switch here excuse me？And is there any suitable model?

 

[rock soderstrom]

Use potentiometer or knob switch here excuse me？And is there any suitable model?

The PAD is switched. But let's not discuss it here, this is the documents section. Your question belongs in the LAB or Drawing board . Thank you.