18-07-2020, 07:04 PM
Thanks Rob.
So in fact the old transformer was working other than getting too warm. Quite common for transformers to be under rated. There is always the possibility that the problem could be induced hum, some times rotation of the transformer 90 degrees can be a cure or even the addition of steel screen can make a big difference. If the old transformer is OK it might be an idea to refit it for a test. I've repaired these in the long distant past and I'd say due to the gain they have there is a little residual hum but nowhere near excessive. If you have a YouTube channel why not do a demo or if there is a way to upload a video it might be helpful.
Certainly here to help if you need it.
So in fact the old transformer was working other than getting too warm. Quite common for transformers to be under rated. There is always the possibility that the problem could be induced hum, some times rotation of the transformer 90 degrees can be a cure or even the addition of steel screen can make a big difference. If the old transformer is OK it might be an idea to refit it for a test. I've repaired these in the long distant past and I'd say due to the gain they have there is a little residual hum but nowhere near excessive. If you have a YouTube channel why not do a demo or if there is a way to upload a video it might be helpful.
Certainly here to help if you need it.
