Quote:
Originally Posted by John10b
Just re-read your 1st post, and other posts, so just to recap, if you don’t mind.
It runs on “isolated mains” at customer. Could you clarify please.
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No it doesn't it runs on normal mains. Its my workshop that has two supplies, one isolated with no earth and one 'direct' mains wired with earth.
Quote:
Originally Posted by John10b
You removed chassis, still on its wooden plinth? Or did I misunderstand!
So at your workshop - it works ok - even on different mains - the difference is:
Not in original cabinet; not original speakers; not on same mains - voltage / form factor?
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The 'chassis' consists of a large wooden plinth which houses the turntable, the cassette deck, the amplifier, the output stages and power supply. This is removed from the cabinet leaving only the speakers and FM aerial behind. The mains is or should be standard. The customer lives around 15 miles away.
Quote:
Originally Posted by John10b
I tend to think the problem is in the preamp stage.
It’s an interesting fault and I will be interested know the outcome.
Cheers
John
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I'll let everyone know as and when I've solved it.