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Uncle Bulgaria · 14th Mar 2019, 6:25 pm

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.

14th Mar 2019, 6:25 pm	#56
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,333	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.