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Old 14th May 2019, 9:10 am   #162
FERNSEH
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 6,347
Default Re: Baird T5 restoration project.

The Baird 240/25 system sent only a single broad frame sync pulse so the possibility of hooking at the top of the picture was a real possibility if the line hold control was slightly off frequency. But there was no circuits to compensate for this.
The Cossor engineers also noted that the deep sync pulses limited the picture contrast. Baird sync pulses were 50 per cent of the video waveform, the reason for this was allow for the poor black level referencing which resulted in the picture information being present in the sync pulses.
It was a hopeless TV system with no potential for improvement.

And yet the Baird TV receivers were excellent.

DFWB.
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