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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 12th Feb 2024, 4:34 pm   #1
dragonser
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Default TV colour decoder PCB, but which TV is it from ?

Hi, I found this colour decoder PCB while looking through a box of obscure items. Anyone know which TV it is from ? I think it must be quite early as no it's are used ?
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Regards Peter B
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Old 12th Feb 2024, 5:02 pm   #2
ctc15
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Default Re: TV colour decoder PCB, but which TV is it from ?

H[ this is a PYE CT70 dual standard colour decoder from 1967.
Keith
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Old 12th Feb 2024, 6:05 pm   #3
Philips210
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Default Re: TV colour decoder PCB, but which TV is it from ?

Hi Peter,

Keith is right, the decoder if from the Pye group hybrid chassis. The original dual standard CT70 and CT71 models were the first to use it. The same decoder is I think compatible with the single standard 691, 693 and 697 chassis. Very few updates were made to the decoder throughout the life of their hybrid colour chassis.

You'll notice the red solder resist on the PCB, a sign of an early version together with the large chroma delay line.
Later versions had a green solder resist and a very small chroma delay line.

Regards,
Symon
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