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Old 12th Oct 2015, 9:00 pm   #54
FERNSEH
Dekatron
 
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Ferguson 247T: huge console TV set.

I have to say I'm pleasantly surprised how well this restoration has gone. The designer had gone to great pains to make sure the interlace is perfect which is essential for a large screen 405 line receiver. The test card pictures generated by the Aurora are with the equalising pulses (EQ) switched off. No cheating allowed. The set is receiving the standard 405 sync train.
I'm concluding the restoration of a Dynatron "Fulmar". With this set I thought I'd got the interlace spot on, but then I discovered the EQ pulses were present in the sync waveform. After disabling the EQs the interlace was lost, really bad line pairing. A major re-design of the frame sync circuits was called for.
Nothing like that in the Ferguson. Also, unlike many early line flywheel sync systems the picture verticals are perfect. Another plus point is the excellent gated vision AGC system.
A replacement safety window is to be made.

DFWB.
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