Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

RE: non-inverting preamp w/schematic ver. 2


I made some adjustments to the schematic that resulted in more gain, lower THD% but slightly higher Zout.

Without the SubOut and 4.7K isolation resistors, Zout @ 20Hz = 5.8K & Zout at 1KHz = 4.9K.

I needed 23dB of Gain to drive my SE 6CB5 triode amp into clipping, so this circuit works OK for that.

Didn't have room on my preamp chassis to add a follower, but with short cable runs in my system, it does not sound like I needed it.

I set my volume pots at 8-9 o'clock for average listening.

Subjectively, I find no issues with sound quality so far.

Thanks to all for comments and ideas.

dt 667

This post is made possible by the generous support of people like you and our sponsors:
  Crux Audio  

Follow Ups Full Thread
Follow Ups


Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.