I am interested in the 7J20/J20 for light source spectrometry. I have an
Ocean Optics fiber-optic one that works for what I usually need, but hey,
one that works with my Tek 7000-series scopes would be neat (and useful).
In my experience, you never know what you can find until you ask. Years
ago, I put an advert is Sky and Telescope for a NASA Apollo Command Module
optical unit assembly (the “space sextant” used to update the Command
Module inertial navigation system) and found a person who had one for sale!
He bought it when the company that made it (Kollsman Instrument) moved
Just for fun, I put my name into eBay search and got a hit. It turns out
that a clever seller had a copy of the SPIE Medical Imaging Proceedings and
he put the names of all the paper authors in the description. It was the
Proceedings from the first meeting so I bought it (later donated it so it
could be scanned and put online).
Only 40 made is really rare. I have used a Tektronix J16 photometer - a
great instrument and Tek made a lot of those (but it doesn’t do
spectrometry - just precision photometry). At the time I was measuring
luminance of CRTs and the uniformity across the tube face (medical imaging
Thanks for letting me know how rare the 7J20/J20 are. I’ll stick with the
Ocean Optics unit - but if someone offered one for sale at less than the
price of a new Tek Mixed Domain scope, I’d consider it!
On Sat, Jul 11, 2020 at 05:40 Colin Herbert via groups.io <colingherbert=
I think if you find one of those, that it will be protected by unicorns.