Steve Anderson wrote:Electrostatic CRT deflection is generally used in 'scope applications where the vertical gain and the timebase are varied over quite a range whilst in use. In an electrostatic CRT you'l usually have five more electrodes than a magnetic CRT, two pins (electrodes) for horizontal deflection, two more for vertical deflection and one more for focus. That's very general, but generally true. There are a few odd CRTs that were deflected horizontally with an external coil, but vertically with plates - but they are oddballs and rare (thankfully).
The advantage for low-speed applications (NBTV/SSTV) is the amount of power required for deflection and focus is almost insignificant. The downside is the voltages required can be as much as 500V, usually less though for most common electrostatic CRTs, say 300V.
If this were your first foray into CRTs try to find a smaller (say 3") tube, the 3" DG7-32 is still widely available in Europe and not that expensive and easy to drive - getting the socket for it can be a different matter - but there are ways around that.
Steve A.
Postscript:- Attached is a PDF of a display I did 10 years ago using a DG7-32. I think it appeared in the NBTVA newsletter around that time but I'm not sure. Today I might do it in a different manner but as you can see it worked as described.
I've posted this before, so I apologise to those that have already seen it...
That took 30 minutes to upload for such a small file...rebooted PC and modem...no idea why
I think Steve the problem here is how do you start ! as in some one who has never touched one i am sure when you think back you had to work out how to experiment with one .
The good thing on the Russian tube he has is he has data but the voltages from a mains transformer still a bit of a worry but you have to want to be careful or you should stay clear of these .
The Magnetic CRT he doesn't and more than likely never will and would need some reverse engineering ,the one he wants to use is in a tv at the moment which i think still works so has a heads up if he can study and take some measurements study the tubes pin connects to what inside the tube ..
The problem he does have on both is he needs to be able the measure the High voltages which would kill hes meter without the HV probe..
Need a procedure depending on what he chooses as in doing this in steps study the tube mount the tube safely for experimentation power supply for the heater so on ,
Your Anderson circuit has been made twice by me and once buy Troy be a good one i should think if he gets to the stage of wanting to make one .