Early theatre TV projector on eBay

[kx250rider]

I saw this on eBay, and the seller says he thinks it's 1962 because of a date on a service manual... Looks earlier to me, but I have never fooled with one of those so no qualifications in my guess. Looks like an RCA 648-style projection barrel with 5" CRT? Hope it gets into the hands of a collector, and the price looks right!

I have seen 40s models of those, and I think there were even prewar ones. I wonder if this is a 40s one and the seller thinks '62 because of a reprint date on the service manual?

http://cgi.ebay.com/Projection-TV-gi...QQcmdZViewItem

Charles

[John Folsom]

This probably is a 1962 vintage machine, with a 5AZP4 projection CRT. This CRT was an upgraded version of the venerable 5TP4, using an improved phosphor and up to 40KV anode voltage.

The attached photos are of my late 1940s RCA projector, model TLS86A, which uses a 5TP4 projection CRT operating at 29KV. The focus is a little soft on the operating photo, but it actually produces a crisp image. If I had a bigger screen, it could handle a 6'X8' picture in a dark room.

[ChuckA]

I'm agreeing with John, it is a sixties vintage projector. Here's a fifties B&W projector from Theater Network Television it uses a 5AZP4 at 35KV, and a sixties color projector in its running colors, it uses three 5AZPx tubes at 40KV.

Also a monster color projector from 1951, not sure if I would want to be that close when it is operating!


Chuck

[old_tv_nut]

Chuck - first time I've seen the 60s color job - thanks for posting.

John - the B&W projo reminds that RCA had a projo in the old B&W TV exhibit at the Museum of Science & Industry in Chicago when I was a kid. IIRC, it was showing the people seeing themselves on TV. I don't remember exactly how big the picture was, but it was very dim - you had to walk through a maze of black curtains to get into the viewing area, and then it took time for your eyes to adjust, like a dim movie theater. I can't remember at all what the projector looked like - could it have been one of these, or do you think the dimness indicates it was something else?

[John Folsom]

Wayne, Not sure exactly what time period you refer to, but assuming it was post 1950, then it seems likely that it would have used a 5TP4 or 5AZP4 CRT, as this is what RCA was making. Of course, as the screen got bigger, the image got dimmer. And the projection CRT at the museum may well have had lots of hours of run time on it. The 5TP4 suffers from considerable dimming with use.

[Dave S]

Go Chuck!