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Old 20th May 2021, 3:14 pm   #35
MisterKrupa
Triode
 
Join Date: May 2021
Location: Hebden Bridge, West Yorkshire, UK.
Posts: 29
Default Re: Thorn 6204 hum after fitting new plug wire

Quote:
Originally Posted by DMcMahon View Post
Quote:
Originally Posted by majoconz View Post
Is that a double-pole power switch on the back of the tone control. If only a single pole, which is more usual, why does it have the phase and the neutral connected to it? Unless, of course, the tag where the neutral is soldered is just being used as a tie point and another wire goes off to the transformer primary.
I cannot find a schematic for the Thorn/Ultra 6204 but on similar BRC/Ferguson/Marconiphone/Thorn/Ultra most of them have the mains going through a double pole on/off switch.

David
That's good to know, it's how it was when I found it - the loose bit is on the other side, I do now think it's extremely likely that I snagged it on first removing the chassis from the case as that bundle of wires is attached to another, which did hook under the lid catch mechanism. If it was a bit loose / dry, the I reckon even a tiny amount of force in the wrong direction would have pulled it free...
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