Another nice ebay find arrived this morning from France. A Sony 9-90UM dual standard (625,819), with a carry case, instructions, ear-piece and receipt dated 1970.
Apply some mains and it comes to life ! Sony TV's are rather boring in this respect, you find an old one and it just works !
Checked with CCIR and French (SECAM) on UHF and VHF all looks good and tube is OK too.
Two questions;
Does anyone have a spare carry handle ? This is broke, the TV is otherwise in excellent condition.
Any ideas on generating 819 lines ?
Surprising how well some sets age well.
The label on the back of the set is interesting, 21.5 watts on mains power and much less on battery, 13.0 watts.
Frank
Nice little set to have.
There is an 819 line aurora, perhaps contact Darryl or Crowthorne tubes for availability. You can generate stills with the RT Russell Test Card Generator but you'd need to make or get hold of a suitable modulator. The David Looser 405 line modulator can be modified and will work but bandwidth isn't great, remember if the source is 625 you'll never see how 819 could really be, later sets and the Sony will never give the full resolution.
Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
Hi.
I would say that yes 819 could be done that way and will give the best possible resolution. All you'd need is a decent modulator.
Peter has had great success with using graphics cards for generating old TV line standards.
Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
If you have a modulator the additional cost of graphics card and cabling could be about £10.
Peter
Yes I'd agree with Peter.
In fact Peter was kind enough to give me a card with a small fault but my Dell PC ruined the card and another I purchased, then the full PC chucked it fully. I now have a refurbished PC and dual booting between Linux Mint 19.1 & Windows 7 so will be trying this once again come the new year.
My intention is get the highest possible standard of pictures on 405 lines and feed this to an ex ITA Channel 11 test transmitter which is a fancy name for a modulator.
Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
My intention is get the highest possible standard of pictures on 405 lines and feed this to an ex ITA Channel 11 test transmitter which is a fancy name for a modulator.
Excellent! Well the graphics card will beat any standards converter for picture quality.
Peter.
Thanks for the suggestions, I was intending to use the graphics card hack to generate 405, but I've started the hedehog converter (SMT resistors just arrived) so didn't try it. But now I've got an 819 line set I'll give it a go. I've got a SECAM modulator which also works OK with system A, but I don't know much about the French 819 system specifications, does anyone have a link ? In English ?
I don't have an 819 set but here is my graphics card and modulator feeding 819 into my Sony 9-90 when set to 405.
Peter
819 lines on the scope!!
Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
There was a Radiola 819 line set on display at Golborne, showing a very sharp test card.
There's also some information about 819-lines and SECAM here:
https://www.radios-tv.co.uk/Pembers/World-TV-Standards/Line-Standards.html#Features-819
When all else fails, read the instructions
There was a Radiola 819 line set on display at Golborne, showing a very sharp test card.
I saw that with the unusual test card, it wasn’t until the second time walking round the room I realised what it was.
Frank
