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Message from discussion Marshall JTM/1962 , of 1998, amp clipping
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Phil Allison  
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 More options Nov 5 2012, 5:56 am
Newsgroups: sci.electronics.repair
From: "Phil Allison" <phi...@tpg.com.au>
Date: Mon, 5 Nov 2012 21:56:09 +1100
Local: Mon, Nov 5 2012 5:56 am
Subject: Re: Marshall JTM/1962 , of 1998, amp clipping
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 "Nutcase Kook"

>> ** The OT is fucked.

> Any other ideas to try with the Tx in the amp and wiring in place?

** In my workshop, I constantly monitor the AC current draw of any piece of
gear on the test bench.

Faulty OTs are immediately obvious as the power coming out of the amp, when
under load and drive, is SFA  -  while the AC current draw is full on.

Also, the resistances of each half of the OT primary differ by more than
10%.

....  Phil


 
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