I have just fixed a problem with my H37 programmer. The LEDs would light, but it wasn't pulling in the relays, so I suspected a low supply voltage. I measured 42 volts across the smoothing capacitor, but also checked with a battery oscilloscope (live mains connected so be careful!). I saw a...
A Google search found this thread - thank you. Very useful advice about not twisting the wires, having been struggling for ages to twist them tight enough to go into the socket. Like the original post, I had enough spare in the wall box to cut off the twisted ends and start again - got two old...