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Old 30th Jan 2016, 1:46 pm   #37
FERNSEH's Avatar
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,065
Default Re: PYE TT1 - First Transistor Portable UK TV

Well, after all that effort the results are to say the least disappointing. Apart from the lack of height and the picture the wrong way, those faults are the least of my problems, it's that strange picture definition that is the real concern.
There is a fault in the vision IF amplifier or possibly the alignment has been got at.
I've always been led to believe the Cathodeon C36-23 CRT is a special tube made for the TT1. Well it turns out to be nothing special at all. For starters the heater is the standard 6.3 volt 0.3amp type, not a low current consumption type made for battery powered TVs. Also it was always thought tube was special high sensitivity type designed to operate on low level video drive. In fact the tube is similar to the Mullard AW36-20.
The attachment shows the peculiar picture.

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