405-Line TV from PC - First Pictures! - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Kat Manton · 9th Apr 2006, 2:05 pm

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

Paul Stenning · 9th Apr 2006, 3:05 pm

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.

Mike Phelan · 9th Apr 2006, 4:52 pm

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.

oldeurope · 9th Apr 2006, 5:48 pm

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

ppppenguin · 11th Apr 2006, 10:26 am

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.

Sean Williams · 11th Apr 2006, 11:06 am

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

LanceM · 11th Oct 2006, 6:42 pm

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.

9th Apr 2006, 4:52 pm	#23
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	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. __________________ Mike.

9th Apr 2006, 5:48 pm	#24
oldeurope Retired Dormant Member Join Date: Dec 2003 Location: Solingen, Germany Posts: 727	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

11th Apr 2006, 10:26 am	#25
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	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.

11th Apr 2006, 11:06 am	#26
Sean Williams Dekatron Join Date: Feb 2005 Location: St.Ippolyts, Hitchin, Hertfordshire QRA IO91UW Posts: 3,517	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 __________________ Engineers make things work and have spare bits when finished

11th Oct 2006, 6:42 pm	#27
LanceM Retired Dormant Member Join Date: Aug 2006 Location: Boise, Idaho, USA. Posts: 6	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.