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Old 18th Mar 2012, 11:26 pm   #8
FERNSEH
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 6,506
Default Re: The Argus is back

Hi Steve,
I'll have get some Mazda AC/P or Mullard TT4 high voltage triodes to serve as the timebase waveform amplifiers. Two valves in push-pull style in both timebases. I'm thinking on the lines of the 1937 Wireless World television receiver project. In that receiver the timebase oscillators were Mazda T31s thyratrons, a difficult valve to find nowadays. The T41 is still available and is electrically similar.
Electrostatic timebases are better for the various frequencies used on different TV standards. One could build a receiver for the 180/25, 240/25 and 405/50 systems.

DFWB.
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