by DODGER » Tue May 08, 2007 8:28 am
HI STEVE, thanks for ef80 and eccback i made 81 info, i haven,t posted for a while as i,ve been making a careful study of scopes set up{and others}to make sure i know where dangers lie and of course just how c.r.t.s actually work. the scope is now skeletal i.e just tube and power supplies {bleeder etc} but now i,ve got a problem, i cannot focus the spot to smaller than the size of a pea, could this be because the x y plates are connected to nothing? i,ve only done brief tests so as not to damage anything. sometime back i made a nipkow disc camera /monitor to the nbtva design which gives good results on "Gary Millards big picture" on the family pc, but unfortunately thats fixed to where it is! a small green screen type monitor dressed to look"1930s" would be very handy for demonstrations. Here also is a pic of a baird signbal as promised, i hope it doesn,t come down an odd size! many thanks. dan.
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