It really would be better to determine if things are OK electrically as unconventional methods might not be needed.
Aluminium is no risk whatsoever but 2 toroids being close to each other might be a risk. Did you, besides paralleling 2 identical windings, also swap L and N of one of the transformers? Please do so and let us know. Of course only 1 of the 2 😀
Aluminium is no risk whatsoever but 2 toroids being close to each other might be a risk. Did you, besides paralleling 2 identical windings, also swap L and N of one of the transformers? Please do so and let us know. Of course only 1 of the 2 😀
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Will do when I get back to it. I've been given a quad push-pull triode strapped 6550 with some incinerated cathode and screen resistors to fix urgently.
Always do things with electrical logic first. From my experience the simplest things can be the cause.
Unfortunately, I won't be able to put the windings in parallel because they're not separate windings. 400V centre-tapped.
I remember now. The centre-tapped winding caused me a lot of trouble when I was trying to convert the original 250V tube supply to a ±150V hybrid (tube + silicon rectifier) supply. I blew a lot of fuses until someone pointed out that the centre-tap was a short. That's how I ended up using a 200V winding from each transformer.
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Using the transformers like that may explain the things you experience 🙂 Maybe it is my misunderstanding but that PSU could work with just 1 transformer (provided it has the right VA rating). Or when the power is really needed the transformers could be used in parallel. In any case, it is strongly advisable to use both windings of each transformer but that should be obvious.
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