OTL Asylum

RE: Futterman H-3 restoration

24.141.114.174

AJ

A

In Reply to: RE: Futterman H-3 restoration posted by 33dot33rpm on March 04, 2024 at 17:51:38

Great work.

The transformer is definitely a weak spot of this amp. I am fortunate that mine is ok after all these years. I did re build mine and made a new wire harness from teflon wire. I have some KEmet poly 600uf output caps that I need to install and get rid of the electrolytic cans that I replaced years ago. They will fit with some creativity.
I actually restuffed the cardboard shells for sprague atoms.

Your transformer information could help others - that is helpful.

Follow Ups:

RE: Futterman H-3 restoration - 33dot33rpm 17:46:40 03/06/24 (2)
Hi AJ, you did some fine work restoring your H-3! Yes C12 is a sore spot in the amp's circuit! I was thinking of paralleling it with something like a 10uf PIO, but it's not my amp so best to leave well enough alone.

BTW how hot does your PT get after driving it for a while? With mine just idling it gets warm. After playing music for say 1/2 hour it get hot to the touch.

Thanks 33
- RE: Futterman H-3 restoration - AJ 18:42:41 03/06/24 (1)
  Hi,
  
  That sounds just about right to me regarding how the temperature of the transformer behaves.
  - RE: Futterman H-3 restoration - 33dot33rpm 08:39:48 03/07/24 (0)
    Thanks AJ, now I have confidence returning the H-3 to it's owner!

Post a Followup:

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.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

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

VH Audio