Home Tube DIY Asylum

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

RE: Can you spot the problem?





Thanks ALL for your comments;

The first BF Cap after the rectifiers was 650uf, 6x the max ratings. Diodes worked well but had ~ 8 amp turn-on surge (tuff on fuses). The 2x 100mf cap (500v) took care of PS issues well enough that JJ 5ar4s work OK.

The owner wanted the amp as original (as close as reasonable). I converted it back to 8417 with changes to the bias arrangement + it now has dual bias pots and simple meter test points.

Listening: Interesting sound, I am normally not too thrilled with UL type sound. These are better than any I've heard. They have a clean and punchy sound.


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


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.