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AncientBrit wrote:Do you think this principle could be applied to NBTV as well as SSTV or are there fundamental problems in doing so? Graham
Steve Anderson wrote:I've spent quite a bit of time wandering through this thread this morning and have to admire Harry's persistence (pun intended) in getting this to work as well as it does. It is now close on to what you'd expect from a P7 CRT.
Steve A.
AncientBrit wrote:Looking very good Harry.
Do you think this principle could be applied to NBTV as well as SSTV or are there fundamental problems in doing so?
Kind regards,
Graham
Steve Anderson wrote:I don't see any reason why not except it does have a very long afterglow which is required for SSTV but not NBTV. It sure would reduce the 'flicker factor' but at the expense of conveying motion, i.e blurring.
With a shorter 'persistence' paint it should be possible.
I've spent quite a bit of time wandering through this thread this morning and have to admire Harry's persistence (pun intended) in getting this to work as well as it does. It is now close on to what you'd expect from a P7 CRT.
Steve A.
I am only sorry i had such a long brake from finishing it to this point it was mainly i had to learn how to get that laser to work and all the different designs ,i had to learn from my mistakes trying to do it with a uv led was pushing it .
As graham was asking about if an nbtv version would work thats where i got it to work so i knew it could work with this older project just a matter of doing it .Conceptually, imagine Kevin Hadfield's 'carousel' arrangement where the carousel is just a cylinder of fluorescent paint....in other words turn Harry's arrangement on its side and speed it up....
AncientBrit wrote:Hi Harry,
re the NBTV experiments I must admit I'd forgotten you'd done that.
Thanks for giving me the link.
Also see my question above re using a non powered CRT,
Cheers,
Graham
Well said Steve, I bet it looks a whole lot better in real life too.
Just to stir the pot a little, as is my wont, it also shows that replacing the glow drum with a mirror drum, and having the beam played on a flat phosphorescent screen... and now how did those old tektronix displays allow printing to dry silver paper?
AncientBrit wrote:"Over to Harry", when he has time of course !
Graham
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