low voltage Cheap and tuby sound preamp

[kodabmx]

Oh crap, that's right. I remember seeing them used with a negative rail (usually made from the heater supply).

I was thinking of the LM334. My bad. It only needs 800mV.
LM334Z/NOPB Texas Instruments | Mouser Canada

 

[Sadface]

Broskie 12VAC board

I can also recommend the Broskie 12VAC boards.

New Aikido 12Vac PCB and part kits

I made one at the start of lockdown. Its been testing in my main system for the duration.



It is well documented and easy to build from the suggested BOM. Sound is fantastic.

I purchased the board to use as a tube front end to some ESP P3A boards in integrated amp.

I chose the 12AU7 route as their fairly cheap and available in good quality here in NZ compared to the 6DJ8.

 

[PRR]

.....simple cheap and tuby sound.....

48V, LM317 loading is getting way off the design goal.

 

[potstip]

Well i decided to go with H2 pass lab harmonic generator. Simply cheap and add tube color sweet warm 2nd harmonics into sound without any tube.