A Keithley 610C? For use, absolutely. I have one above my workbench too, that I used last week. (Also a 405, but that one is purely for coolness.)
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
I use it now and then, when I'm working on analog things; it's really a fabulous instrument. It's not much help in designing picosecond-speed 50-ohm stuff.
But I agree, it is beautiful.
-- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
I forgot to ask, what kind of connector is on those? Why wasn't a BNC good enough?
It's an SO-239 'UHF' connector, which predates BNC by 20 years or so. My 610C has a nice Teflon UHF M - BNC F living on it.
(The 610C is from '68, when UHF connectors were still common outside ham gear, I believe.)
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
I have no idea how old this one is
but it probably pre-dates most of my employees and most of my kids.
It still works fine, but fast mode is goofy. At extreme limits, it gets very slow.
-- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard
And the 10-fA FS range (1E-11A on the big dial, 0.001 on the small one) is purely aspirational.
OTOH when full scale is 62000 electrons/s, keeping both decent knob response and low noise is a bit of a challenge when you're building all-discrete circuitry even today. ;)
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
We have 2, they are ok. You need to mask off the light, to prevent glare. It doesn't exactly shine onto the work surface.
Cheers
-- ----Android NewsGroup Reader---- https://piaohong.s3-us-west-2.amazonaws.com/usenet/index.html
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.