Tektronix Technical Forums are maintained by community involvement. Feel free to post questions or respond to questions by other members. Should you require a time-sensitive answer, please contact your local Tektronix support center here.

Search found 2 matches

by lvcian
May 4th, 2020, 8:10 am
Forum: Low Current Measurements
Topic: Old 640 vibrating capacitor electrometer
Replies: 11
Views: 35106

Re: Old 640 vibrating capacitor electrometer

Hello Mr. Dilaura,

Thank you so much for your replay and the interesting historical background for this instrument !! Would you be able to share that early edition of the instrument's manual that you mentioned ?
by lvcian
November 14th, 2019, 3:27 pm
Forum: Low Current Measurements
Topic: Old 640 vibrating capacitor electrometer
Replies: 11
Views: 35106

Re: Old 640 vibrating capacitor electrometer

Does anybody have a stock or leads on the Phillips xl7900 vibrating membrane capacitor that is at the heart of the keithley 640 ? I've recently acquired a 640 electrometer and find the dc-ac modulation technique fascinating and would like to acquire a few of the Phillips xl7900 for study and experim...

Go to advanced search