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FERNSEH · 29th Aug 2017, 4:17 pm

The blocking oscillator valve V8B only conducts during the flyback stoke. As it's name "blocking" implies the valve is cut-off during scan period because of the negative charge on the ramp forming capacitor. It's most likely a low anode voltage will be the result of cessation of oscillation.

DFWB.

29th Aug 2017, 4:17 pm	#50
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: And the next one! a GEC BT2147 The blocking oscillator valve V8B only conducts during the flyback stoke. As it's name "blocking" implies the valve is cut-off during scan period because of the negative charge on the ramp forming capacitor. It's most likely a low anode voltage will be the result of cessation of oscillation. DFWB.