Tubes Asylum

Some claim to be able to test for "noise"

23.125.184.79

Steve O

In Reply to: RE: Tube testers do not test for noise posted by Alpha Al on April 08, 2024 at 19:56:14

This particular tester has a "noise test". User is instructed to connect the two "noise" jacks to the antenna input of an AM radio. Tube is then set up and at some points in the test sequence you listen for noise on the radio either as the tube sits or by "flicking" it. Don't think this is up to audiophile standards but . . .

Follow Ups:

this guy tests for everything - elblanco 16:52:30 05/01/24 (0)
h
- https://vintagetubeservices.com/laboratory/ (Open in New Window)
RE: Some claim to be able to test for "noise" - Triode_Kingdom 20:13:51 04/12/24 (1)
I don't own a TV-7, so I never noticed that feature. Like you say, it might only detect tubes that are so noisy, it would be the result of a broken internal support or internal arcing. An AM radio isn't going to provide a noise floor low enough to compare small signal tubes for hi-fi characteristics.
- RE: Some claim to be able to test for "noise" - Steve O 04:59:34 04/13/24 (0)
  The TV7 is a military device designed for rough field service, is waterproof when lid is closed and has super rugged construction. Interestingly, there's a note somewhere in the operator or service manual that states something to the effect that despite tester results, the only real test of functionality is whether or not the tube performs properly in a circuit. IOW, a diagnostic tool but not the final word on tube condition.

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:

Atma-Sphere Music Systems, Inc.