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Television Standards Converters, Modulators etc Standards converters, modulators anything else for providing signals to vintage televisions.

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Old 9th Apr 2006, 1:05 pm   #21
Kat Manton
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Default Re: Recording 405-line video on VHS

Hi,

Moderator: Maybe this should really go on the end of 405-Line TV from PC - First Pictures!?

Quote:
Originally Posted by Mike Phelan
Hi folks
You do really need to go to the NVCF and see this......
And by then I should have more of it working; (off-air TV if I can get a signal there, conversion of external analogue 625-line source... I'm working on it...) and I think a decent monitor or two will be in use - the Sony portable TV does at least prove the thing works, though.

As for the line frequency, the counter says 10.1279kHz, so only 3Hz off... though I've no idea when that counter was last calibrated - Mike would probably agree it's not exactly state-of-the-art

I'm looking forward to NVCF and putting a few more faces to names

Regards, Kat
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Old 9th Apr 2006, 2:05 pm   #22
Paul Stenning
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Default Re: Recording 405-line video on VHS

Quote:
Originally Posted by Kat Manton
Moderator: Maybe this should really go on the end of 405-Line TV from PC - First Pictures!?
I agree, and have moved it there.
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Old 9th Apr 2006, 3:52 pm   #23
Mike Phelan
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Default Re: 405-Line TV from PC - First Pictures!

Apologies for having to move the post, and inadvertently having speeded up Kat's poor ol' line timebase by a factor of 1000 as well.
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Old 9th Apr 2006, 4:48 pm   #24
oldeurope
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Default Re: 405-Line TV from PC - First Pictures!

Be carefull, the V- sync confuses the counter.

Interesting thing: I have a modified Sony dual standard camera.
It gererates its V- sync by divieding the (doubled) H frequency.
The H oscillator is a free running RC oscillator. So the frequency
changes a little bit. But after recording a vhs tape and playing it
back, there is no frequency drift any more. The VCR makes sure
that the playback v- frequency is locked to the mains or an XTAL,
thus the H frequency is corrected too.

How does your final schematic for the vision-sync combinner look
like?

Kind regards
Darius
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Old 11th Apr 2006, 9:26 am   #25
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Default Re: 405-Line TV from PC - First Pictures!

I have just had confirmation that we will have facilities to demonstrate Kat's PC converter at the NVCF. I also hope to bring the new Aurora converter.
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Old 11th Apr 2006, 10:06 am   #26
Sean Williams
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Default Re: 405-Line TV from PC - First Pictures!

Looks like I will have to attend the NVCF now...... - I look forward to seeing all of the Television displays....

Now, how to earn enough brownie points for three weekend passes on the trot?.....

Cheers
Sean
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Old 11th Oct 2006, 5:42 pm   #27
LanceM
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Default Re: 405-Line TV from PC - First Pictures!

Exellent work, that is deffinitely not an easy task to accomplish. I think all here are envious of your work, probably wish they had thought of it before. However, I was wondering on the subject of 405 line UK TV material, if you might have any such material from that era on 405 line videotape ? Or might know where I might locate some material privately ? I am doing some research for school, which this ties into. Any assistance from anyone would be appreciated. Also please look at my latest thread on the Television area about PAL Shibaden VTR's.

Cheers, Lance.
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