Home Tube DIY Asylum

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

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Tube DIY Asylum ]
[ Alert Moderator ]

RE: What is the 6922 circuit for?

I do need that gain. If you look closer, the input to the 6GH8 is sufficient for most audio sources. This amp is a dedicated purpose unit for a tube based ambiance processor (the simple classic Hafler idea) that sits right next to it. Invert one channel and mix back with the other un-inverted. The processor has a gain of about 0.6 as it's all cathode followers. Yes I could re-engineer the ambiance processor with a more stout gain stage but I don't want to rebuilt that project as it works well as-is.

No, John did not actually design that circuit. What I meant was I used TubeCad to design and simulate the SRPP. So in a sense he approved the design as TubeCad said it was OK. (note my concerns about TubeCad in a thread below).

This amp only sees out of phase audio signals so frequency response, certainly bass response, is mostly irrelevant.

The rest of the amp section is a classic pentode gain stage feeding concertina phase splitter similar to countless 1960s designs.

Seems I am on the right track regarding the coupling cap. I used 1uf when bread boarding as it was feeding my Tek audio test set.

Thanks for the input.

P.S. Tube surround sound? Hey I like it and can always turn it off if I don't for a particular cut. Try it if interested.

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

Follow Ups Full Thread
Follow Ups
FAQ

Post a Message!

 Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
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.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]