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FERNSEH · 5th Jun 2015, 10:42 pm

Hi Robin,
The line and frame shift controls were only fitted on the Regentone T15L Mark 2 models. I do know this feature did result in some rewiring of the line output transformer. The circuit diagram is of the original Plessey Mark 1 chassis and is fitted in the Philco and also the Defiant version of the same model, so in many respects it resembles the Derwent circuit.
I don't think the line output transformer is the reason why the hold control runs hot.

DFWB.

5th Jun 2015, 10:42 pm	#17
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Derwent 9" television Hi Robin, The line and frame shift controls were only fitted on the Regentone T15L Mark 2 models. I do know this feature did result in some rewiring of the line output transformer. The circuit diagram is of the original Plessey Mark 1 chassis and is fitted in the Philco and also the Defiant version of the same model, so in many respects it resembles the Derwent circuit. I don't think the line output transformer is the reason why the hold control runs hot. DFWB.