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Old 15th Nov 2018, 11:39 pm   #3
Graham G3ZVT
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Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,675
Default Re: JVC 7700EK VCR 1980. 405 line recording.

Quote:
Originally Posted by simpsons View Post
I too have just been given a Ferguson 3V23 which has been used to play back 405 line recordings. One such recording is, I am told, inside the machine which I look forward to playing. In ignorance, I was under the impression that only earlier ie mechanical VCR's could be used
In theory a VHS recording and playback system shouldn't care what line standard it is processing particularly as 405 and 625 share the same frame rate and therefore drum speed, in practice however machines tended to get too clever, and started to digitally clean up the sync pulses and be overzealous with drop-out correction which meant it basically got totally confused by the unexpected line rate.
Quote:
Originally Posted by simpsons View Post
From an earlier post, I believe that it is not possible to digitally record such 405 line recordings to use as a master.
It must be possible, and a lot simpler than 625, no colour to worry about! But nothing readily available as far as I know.
Quote:
Originally Posted by simpsons View Post
Not yet tried, I wonder if a combined VCR/DVD recorder might be tricked so that the visual loss when back to back video tape recording can be minimised.
Many have tried and failed to record 405 on a DVD recorder, there is a fundamental reason why but I have forgotten the details.
Quote:
Originally Posted by simpsons View Post
Of course, many "old school" television recordings are available from the BBC on DVD or through Freeview/Web "DAVE" equivalents which can be held on HDD after which a Aurora will complete the loop.
But if you think about it there is a wealth of material originally made in 405 ready digitised and available on Youtube Vimeo etc. and that's why a few of us are keen to popularise the method of using a PC graphics card to output a 405 line signal directly, It's based on a project that was announced in this forum 12 years ago under the name FotH-TV and has lain dormant until I rediscovered it two years ago, and realised it nolonger had to be a geeky Linux project.

https://www.vintage-radio.net/forum/...d.php?t=130716
https://www.youtube.com/watch?v=Q9b7_x0g0uM
https://www.youtube.com/watch?v=ahzdx4KgWBg
http://www.nostalgiatech.co.uk/Baird%20240%20lines.htm
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