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.
These small rectangular buttons fit onto the push button switch shafts, friction fit.
The push button switches are those used on the front panel to control POWER, RANGE, VOLTS, CHARGE, CURRENT, DAMPING & ZERO CHECK
ONLY supplied as a complete set of buttons, not individually
UNIDENTIFIED MANUFACTURER - Push Button
99% Sure Made in America, just about everything else in the 642 is USA made or sourced.
Colours: 1x RED 2x DARK BROWN 7x LIGHT BROWN 3x BROWN/YELLOW
DIMENSIONS:
10mm wide x 10.75mm deep x 5.4mm height
Fixed onto the push button shaft in a vertical orientation
Diameter: 8.8mm
Front to Back: 10.35mm
The rectangular "grab section" inside the knob fits a push button switch shaft measuring 3.30mm x 3.50mm x 7mm length
When pushed onto the push button switch shaft, the fitting is tight and very secure.
COSMETIC CONDITION:
USED
CLEAN
Reasonable condition, not pristine but no physical damage such as scratching/marks
Colour fade due to the passage of time (for example, the RED POWER button looks more like a PINK/RED than a deep RED)
If you need "pristine" buttons, these will not satisfy you ... if however you need a button with the condition not being of paramount importance, these may be of interest.
Now packed safely away in a single pack of 13 buttons within a sealed plastic packet
