Great test equipment designs

Jul 29, 2018 105 Replies

The one that got the most votes, silly. How else could one determine truth? Too modern. :(

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com

There are still depletion parts around.

John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com

Hmm. in my school the engineer's were certainly smarter the physics guys... at least undergrad. In grad school, at my time, there were a lot of smart people coming over from China and India and elsewhere. Our school sorta used the US students to teach recitations and labs, and then got a masters degree after 2-3 years.. kinda used by the system.

I learned a ton of physics from foreign grad students. Bidyut Bhattacharya*, was in the next door lab. He'd help me solve some problem, and then give me a problem to solve, before I came back for more help.

It was a wonderful time! George H.

*I couldn't remember how to spell his name... but found him on youtube!!! now I've gotta send him an email.
formatting link

Works in climatology and political science (same thing) departments.

** The original HP200 Wein Bridge oscillators were produced by HP prior to WW2 and Walt Disney famously ordered 8 modified versions to help create the sound track to his Fantasia movie.

See several pics near middle of this link:

formatting link

Previous high quality oscillator designs had used LC oscillators or much more expensive RF twin oscillator " beat frequency " methods that covered the audio band in one range.

HP200s featured 1:10 switched ranges to cover the audio band or a little more. However, using a simple RC oscillator cut manufacturing costs and considerably improved performance at the same time - see the price Mr Disney got his oscillators for !!

.... Phil

====snip====

Addressing the matter of "The Elephant in The Room"? :-)

Johnny B Good

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required