HISTORY:
This hardware has been pulled from a wonderful piece of test equipment made by KEITHLEY (USA), the 642 Electrometer. This equipment is from the 1980's ~ 1990's era, technically advanced (for the day) and designed to measure voltage, current and charge to extremely low levels (see one of the snapshot photographs from the User Manual)
Why "part out" such an instrument? I have decided to make this equipment an "organ donor" because a critical component is no longer with me, the remote head! To make measurements a wired head is required and without that, the instrument had no sensing abilities.
TEST EQUIPMENT KNOB - Ex KEITHLEY 642 Electrometer
Part number unknown: The Service Manual identifies most components and the manufacturer but it is not so good with the hardware!
On the 642 this is the Zero Adjust control knob
Material: Brown plastic
Ribbed sides for easy finger grip
Fixing: Grub screw (single & tiny hex head!)
Standard 1/4" shaft fitting, inside knob has a metal bushing
DIMENSIONS:
12.50mm diameter x 16.50mm height
Inside fitting, female (metal bush) to suit 1/4" shaft
Extremely small grub screw on the side of the knob, single screw
COSMETIC CONDITION:
USED
CLEAN
Looks to have barely been touched, very clean with little signs of any handling wear
Now stored safely away in a sealed clear plastic packet
