DIY HiFi Forum

RE: Cole LCR Review

58.171.171.193

In Reply to: RE: Cole LCR Review posted by ChasLieb on May 02, 2008 at 18:28:29

Sorry Brian I did not read your post regarding use of a Variac until after I had posted my last entry.

I for one would be interested in the solution to this problem for future reference. Here are a few guesses and comments. I might well be wrong and am happy to stand corrected.

Is the buzz 50/60 Hz or 100/120 Hz?

If the former this might suggest satuation for only one polarity. But the DC blocker should minimise the likelihood of this.

If the latter then magnetostriction within the transformer might be the cause and this does not need a loose plate. This would mean the transformer was the substantive player in the electrical aspect of this issue. Mechanical isolation might help. This should not be dependant upon AC mains voltage since the flux within the transformer should be the same for 120 V or 240 V operation.

Does the cover act as a sound box or as part of the transducer? So is the cover purely an acoustical part or an electromechanical part.

If it is the former then a non-magnetic cover may not solve the problem. Mechanical bracing might assist.

If it is the latter then increasing the reluctance of the magnetic path should help. See my earlier post but please note I recommend maintaining the earthing of all metal covers etc.

I would be interested in any comments and results for future reference. Who knows, one day I might be faced with a similar problem.

Cheers

Richard.

Follow Ups:

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.