My multi system VCR139 CRT monitor - UK Vintage Radio Repair and Restoration Discussion Forum

dalekmoore2007 · 21st Mar 2021, 2:13 am

I Started this monitor in 2017 and experimented in higher line rates other than standard NBTV 32 line 12.5 rates
Did a fair bit of work with this little CRT build is here
http://www.taswegian.com/NBTV/forum/viewforum.php?f=31
We have FreeNBTV software can use any thing you want line rates up to 240 line found here
http://www.taswegian.com/NBTV/forum/...=2458&start=45
Well only limited to the bandwidth of your sound card so that limits you to the video quality not the line frame rates ...so what i did to keep the video Quality with the bandwidth possible for the highest line rate was drop the frame rate below is 240 line 2 hz image is still viewable sort of a cross between SSTV and NBTV .
I call it SNBTV ; ) slow NBTV ! short you tube video below and camera results slow enough for the cameras shutter to pick up all the image .
https://www.youtube.com/watch?v=4qoeoWDusQI

Ed_Dinning · 21st Mar 2021, 9:52 am

Good pictures, will you go up to a supersized VCR97 next ?

Ed

dalekmoore2007 · 22nd Mar 2021, 10:05 am

Quote:

Originally Posted by Ed_Dinning

Good pictures, will you go up to a supersized VCR97 next ?

Ed

Yes i am going bigger i am going to use my 60s dead scopes CRT a GEC 1025 H i have data for the GEC 1000 H which looks the same least pin out is i will have to adjust work it up to working condition trail and error lets hope not to much error !

If it works out and i can power this beast it has 2 electron guns and 2 deflection plates i might be able to do what i am doing here on my binocular monitor
on one crt
https://www.youtube.com/watch?v=NnOemQof-6U
But i want to go 120 180 240 with low band width select as in low 2 hz frame rate since i don't have a system converter and i can make the video on the pc and use its sound card be horizontal scanning

21st Mar 2021, 2:13 am	#1
dalekmoore2007 Pentode Join Date: Aug 2008 Location: Melbourne, Australia Posts: 213	My multi system VCR139 CRT monitor I Started this monitor in 2017 and experimented in higher line rates other than standard NBTV 32 line 12.5 rates Did a fair bit of work with this little CRT build is here http://www.taswegian.com/NBTV/forum/viewforum.php?f=31 We have FreeNBTV software can use any thing you want line rates up to 240 line found here http://www.taswegian.com/NBTV/forum/...=2458&start=45 Well only limited to the bandwidth of your sound card so that limits you to the video quality not the line frame rates ...so what i did to keep the video Quality with the bandwidth possible for the highest line rate was drop the frame rate below is 240 line 2 hz image is still viewable sort of a cross between SSTV and NBTV . I call it SNBTV ; ) slow NBTV ! short you tube video below and camera results slow enough for the cameras shutter to pick up all the image . https://www.youtube.com/watch?v=4qoeoWDusQI Attached Thumbnails

21st Mar 2021, 9:52 am	#2
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,194	Re: My multi system VCR139 CRT monitor Good pictures, will you go up to a supersized VCR97 next ? Ed