HISTORY:
This component 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.
COMPONENT MANUFACTURER:
Bishop Electronics (BEC) was established in 1977, known in the industry as "capacitor problem solvers" in the world of film capacitors and also "audio grade" capacitors. The company was acquired by Electrocube (USA) and they continue to produce a range of Bishop branded capacitors.
This capacitor (USED) is circa 1980's, not a recently manufactured component.
BEC (USA) - Metallised Polyester Film Capacitor
Type: A11C Series
Value: 5.0uF
Voltage: 200V
Tolerance: +/- 20%
White tape wrap, end plugs are epoxy filled
Circa 1980's (pull from the Keithley 642)
Body of the capacitor is printed (in Blue) ...
BEC-9231
A11C-200V
5.0+- 20%
Axial leads
Lead length is 29mm one side & 32mm the other, 0.75mm diameter tinned copper wire
DIMENSIONS:
43.5mm length x 15.75mm height x 11.25mm thick
TESTING:
Being a USED device of some age, I made a quick test of this capacitor
Value: 5215nF (5.215uF)
ESR: 0.91 Ohm
Loss: 0.1%
Well within the 20% tolerance specifications, closer to a 5% tolerance cap
