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Old 27th Oct 2017, 7:17 pm   #141
Heatercathodeshort
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Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
Default Re: HMV 1804 Television.

It's called 'Circular Modulation'. Rather complicated involving the use of 6 X Z66 valves, 2 X KT44s and a specially wound teroidal line output transformer and scanning yoke.

Either that or David has trimmed up a bit of fine gauze and stuck it in the middle of the tube. I suspect the latter.. John.
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