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PJL · 10th Apr 2020, 11:25 am

Measure the resistance of the field coil as Graham suggests. It is probably over 2000 ohms.

Assuming it is high and you are happy with the results then I would leave it as is. If you replace the output valve with one with better emissions it will create another problem by reducing the HT volts.

10th Apr 2020, 11:25 am	#79
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Pilot U650 Measure the resistance of the field coil as Graham suggests. It is probably over 2000 ohms. Assuming it is high and you are happy with the results then I would leave it as is. If you replace the output valve with one with better emissions it will create another problem by reducing the HT volts.