Risky, I know. But I couldn't get genuine Sowter transformers.
Freeshipping 10K:10K permalloy audio isolation transformer with shield balanced and unbalanced conversion audio isolator|Transformers| - AliExpress
I don't think they will be fakes, copies maybe.
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Fifty bucks for an unknown quantity? Hammonds are only $65, and you at least know they’re going to be good. I used them on my 6550 amp and they’re perfectly transparent.
I also got some of the $6 Triads for a couple of different projects. If you drive them from a low Z source (like typical pro audio gear) they go *way* lower than the “rated” 200 Hz.
I also got some of the $6 Triads for a couple of different projects. If you drive them from a low Z source (like typical pro audio gear) they go *way* lower than the “rated” 200 Hz.
I've just got around to fitting the 10K:10K input transformers.
The amplifier is now virtually silent. There is an absolutely miniscule hum audible if you put your ear right against the speaker.
The amplifier is now virtually silent. There is an absolutely miniscule hum audible if you put your ear right against the speaker.
If you recall, I also had an issue with massive hum with no inputs connected. That issue has been cured with the input transformers.
It no longer hums with no inputs connected.
It no longer hums with no inputs connected.