30-01-2017, 03:17 PM
I soldered and cleaned the output transformer as connections weren't so good. I have retested that the oscillator and one side of the resistor connects to the oscillator anode. Also the pushbutton switch makes or breaks the feed.
The switch contacts however seem to indicate there is where the problem lies. As stated before my meter shoes no contact between supply side of resistor and HT. To make it clearer still the radio won't even work at all unless I press down on the piano key and hold it down. If I let go the sound may go off.
I could do with getting at the button mechanism but will try WD40 and constant switching. Do these piano keys get really filthy or do the contacts just warp? Where I can I'm testing the PCB side of the switches.
The switch contacts however seem to indicate there is where the problem lies. As stated before my meter shoes no contact between supply side of resistor and HT. To make it clearer still the radio won't even work at all unless I press down on the piano key and hold it down. If I let go the sound may go off.
I could do with getting at the button mechanism but will try WD40 and constant switching. Do these piano keys get really filthy or do the contacts just warp? Where I can I'm testing the PCB side of the switches.
