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Old 11th May 2021, 2:25 pm   #4
DMcMahon's Avatar
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 3,612
Default Re: Help getting Motor to Run on TK20

Had to find my TK 20 to double check location of the relay.

In the 2 attached photos, it is the relay to the left of the motor, directly behind the right hand valve (ECC81). I see that my TK 20 is different to the schematic I was checking, as it does not have the mains voltage selection switch, so mine could well be a 220 volt model.

My TK 20 powered from Variac starts to spin the motor at around 130 volts.

You could power the motor direct from your Variac but keep the run capacitor connected.

Note that the output side of the run capacitor that connects to the other motor winding (auxiliary ?) will be at a higher voltage than the mains supply, for me at 240V it is 272V.

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