Mastodawn

First thing on the new bench: this tv test pattern generator. It uses a flying spot scanner - a CRT scans a spot across a transparency, and the varying intensity is picked up by a photomultiplier tube and becomes the video signal 🤯. In. Sane.
#electronics #1970s #retroTech

@forty2
What 😯 Amazing.

pinkmoon Mar 10

Wow, I used to have an RCA photo multiplier tube like that too. A great collection of measuring instruments. I used to have a Heathkit RF signal generator.

phaseseeker Mar 10

@forty2 I've seen Shango066 use a similar one for sets with weird IF frequency IIRC. Very cool device.

Laberpferd Mar 10

@forty2 you might also be interested in "Monoscope" tubes, which skip the optical part and have the test chart builtin, to directly deliver elecric output
https://www.earlytelevision.org/rca_tk1c.html
https://www.tvcameramuseum.org/marconi/bd665/p-3.html
https://lampes-et-tubes.info/ct/ct052.php

also crumbs @slyka

RCA TK-1C Monoscope

early television

VWestlife Mar 11

@forty2 That's actually an ultraviolet CRT.

@vwestlife I assumed it was P11, but it looks like it's P16, which is a lot faster, and bluer!