Re: Ferrograph 4A: Restoration advice needed
Thank you Lawrence - I can trace that now. It's off E & F on the deck into TR2 on the anode of V4 and the HT.
I checked the cathode bias resistor on V4. It was high so I put another in parallel until RS can send me the right one. With the deck in 'play', I got 8.9V across 218R so there was 40mA through the valve.
There was a slight sense of stickiness, as if the solenoid was pulling a little, but not enough to hold the slider in.
|