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PJL · 19th Apr 2019, 4:04 pm

Pin 3 is the cathode with 27V and that is across R28 (150 ohms) and corresponds to a current of 180mA! As that is not a realistic current, check the voltage on pin 3 again and try measuring the resistance of R28.

19th Apr 2019, 4:04 pm	#123
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Ferguson 382U Firefly not playing ball Pin 3 is the cathode with 27V and that is across R28 (150 ohms) and corresponds to a current of 180mA! As that is not a realistic current, check the voltage on pin 3 again and try measuring the resistance of R28.