Quote:
Originally Posted by Heatercathodeshort
The deterioration over time points at the LOPT overwind, the old problem encountered many times on this forum. I have had a similar problem with the earlier but very similar BT302 series but they have always responded, over a couple of days, to the pass a low current through the pitch insulated overwind in an attempt to drive out the moisture. John.
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Hi Andy,
In addition to John's point above, have you checked the temperature of the LOPT after it's been on for 1/2 hour? I've had transformers that get way too hot in that time- usually the primary part of it. I'm not sure why some seem to get so hot when there are no other apparent faults. Turn it off before you stick your finger on it though- it will bite!
Can you post some pictures of the chassis & LOPT?
Good luck
Nick