Look for 12AU7 Preamp Circuit .

[RCA245]

Hi everybody.
I need preamp circuit of 12AU7 SRPP contact to 12AU7(half ) Cathode Follower.

Hope to offer information to me.Or can teach me how to design.

Thank you very much.

 

[lt cdr data]

http://www.audiofanatic.it/Schemi/Tipo/Valvole/pre/pic_pre/pre_6SN7_4.jpg

here's the input stage, you mean direct coupled to the cathode follower?

another@

http://www.audiofanatic.it/Schemi/Tipo/Valvole/pre/pic_pre/pre_6SN7_4.jpg

finally!!

http://www.triode-systems.com/modules/myalbum/photo.php?lid=26

 

[Giaime]

The last circuit has an abnormally low current in the mu-follower, it definitively isn't much hi-fi sounding with gobs of second armonic.

But many people like that...

Dear RCA245, i suggest that you purchase TubeCAD from Glassware, it can help you design your SRPP.

I would also suggest of using another tube instead of 12AU7: 6DJ8/ECC88 is a good tube for SRPP, also 6SN7 is.