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Old 10th Dec 2021, 10:51 am   #7
Heatercathodeshort
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Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
Default Re: CRT Heater to cathode leakage

Remarkably the capacity between the secondary winding and core of the Radiospares transformer is only 66pf. the larger one is 68pf. It is 25pf between windings and RS recommended it was fixed to the cabinet rail rather than the chassis. This very low capacity would have had an insignificant effect on definition.
As you mention Trevor the older mono receivers would have had great difficulty in providing .3a from the LOPT! It was very successful with the later transistor colour tvs.
John.
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