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el gringo · 12th Apr 2019, 5:33 pm

Hmm.. +1.0V shouldn't the grid of V4 be -ve WRT to the cathode ( which appears to be grounded )?

I didn't have another 6M8 resistor, so just tried a (4M7+1M2) in there. voltage on the grid is still +ve (0.6V).

Pete

12th Apr 2019, 5:33 pm	#81
el gringo Tetrode Join Date: Mar 2019 Location: Surrey, UK. Posts: 77	Re: Ferguson 382U Firefly not playing ball Hmm.. +1.0V shouldn't the grid of V4 be -ve WRT to the cathode ( which appears to be grounded )? I didn't have another 6M8 resistor, so just tried a (4M7+1M2) in there. voltage on the grid is still +ve (0.6V). Pete