Audio Asylum Thread Printer

Get a view of an entire thread on one page

FAQ / News / Events

Vintage Asylum

Scott 222c Transformer Ground

76.22.38.198

I am going through some old work trying to clean up things on my 222c. Supposedly I have learned more since I started doing restorations and noticed I was very sloppy here, especially with the ground scheme. Might explain some minor hum I am getting.

Anyway, originally the PT is grounded to one of the tabs on the first twist lock filter can. When not using twist locks for filter supplies, what is the best or most proper way to ground the PT?

What I did here (16 years ago?) was ground direct to chassis using the same ground as the B+

Should I use a single ground bus (like McShane) or should I mimic what was there on the twist locks, which seems like multiple floating grounds- not sure how I can mimic that original method or if it matters.

Thanks inmates!

Jeff

Follow Ups:

RE: Scott 222c Transformer Ground - 6bq5 17:54:20 02/18/25 (2)
Having the PT grounded to the Chassis is where I would start.
This can get complicated if you keep the original power cord -
as it did not differentiate between the line and neutral in a polarized outlet...
Happy Listening
- RE: Scott 222c Transformer Ground - mr9iron 18:15:13 02/18/25 (1)
  ahh yes, it is the original power cord, it was in such nice shape I left it in, didn't think of that. I hate to get rid of it.
  
  thanks,
  
  Jeff
  - RE: Scott 222c Transformer Ground - Triode_Kingdom 20:12:38 03/04/25 (0)
    The proper way to do this is to first ground the transformer to the chassis. Anywhere will do. Then install a three-wire line cord (I'm assuming you are in the U.S.). Finally, lift all power supply and signal grounds off the chassis, including input and output connectors. That can be a little complicated, but it's worth the effort.

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: