Hi at last found my valve collection Garys Slow scan tv scan finally got me to do a hunt !
Trouble with most of the valves are most of or all the markings are rubbed off them i have an idea what most do and the type of valve it is ,i think i am lucky with garys electronics Australia SSTV circuit i am pretty sure i have the ones needed .
I know both CRTs are not P7's but i wouldn't mind trying one of them for this ..
I also have the idea since Steve asked about mechancial slow scan tv and think it should still be done via a phosphor.
And viewing a utube video on phosphor type paint this fellow doing experiments with leds and the paint was saying perhaps you could do a fax machine via a drum painted with the paint and have a led do the modulating ...i am thinking a vertical drum spinning horizontal for the line scanning and the led moving down slow...for this i would use a dvd cd player insides the little motor that drive the laser led is geared and on 2 arms to move up and down so just a matter of controling this with the reset speed back to the start position ...slow scan tv 8s the reset of the led at the finish of the scan to the start position would be fast enough .
http://www.youtube.com/watch?v=YfpNQMQf_ts
http://www.youtube.com/watch?v=ABjrbwy9YPk
http://www.youtube.com/watch?v=GaJeLafvdBw
Again on the phosphor i was also thinking of increasing the phosphor of a fast phosphor crt by placing a plastic sheet infront of the tube painted with the glow paint if i was brave enough and knew it would work i would just paint the front of the crt !
Also do any of you know what this little crt is i'd like to find a schematic of both the little one has no number its rubbed off ..i can test and guess whats what init but no idea correct voltages same gos for the other but i have the number for that one its in the photo .