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Old 4th Jun 2017, 3:29 pm   #77
FERNSEH
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: HMV 1804 Television.

The attachment shows the waveform present at the anode of the KT61 frame output valve. Scope settings: timebase 5mS per division and Ch1 50V division.

A 100microsecond 30 volt P - P sawtooth drive is present at the control grid tag of the KT44 line output valve. The next task is supply 4 volts to the KT44 and find out if the line output stage is working.

DFWB.
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