There were several Tektronix TV studio vectorscopes. They were of three designs- stand alone, high precision like the 520, smaller simpler and less precise self contained models with the color decoder built in for use with video recorders, and simple X-Y displays like the 602 that had no decoding circuitry and were used in video recorders and with video monitors like the 650. Most you will find will have been on constantly for years and the jugs will take fifteen minutes to come up to their best brightness. They are not of much use for anything besides monitoring 480 I video, but if you collect and restore older studio equipment they are all quite useful. VHS and even old DVDs are having a quiet resurgence in popularity, and these monitors are valuable for working with this older equipment. Try to find them a home instead of trashing them.
Bruce Gentry, KA2IVY
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On 11/27/20 5:30 PM, Ed Breya via groups.io wrote:
I just took a quick look at the 528 on tekwiki. As it is, it's pretty much only good for the original purpose. But, it appears to have an electrostatic deflection CRT (since it's basically a scope, not a TV display, which would tend to use raster-scan), so you could convert it to a nice little low speed X-Y monitor, with simple changes to the guts, if you're so inclined, and need such a thing. I don't know if the graticule is built into the CRT face (probably) - if so, you'd be stuck with the IRE etc scales, instead of a nice grid. If you really want to fix and make it into an X-Y monitor, you can probably find some Tek scope or other CRT that is the same except for the faceplate, and swap it in.
Ed
