BACKGROUND:
Spectrol (UK) is a very well known designer & manufacturer of high quality resistance products, these miniature dual potentiometers are ORIGINAL Spectrol components, before Vishay came into play some years ago.
The coding used on the potentiometer body is a bit sparse on information but read below for further details ...
SPECTROL (UK) - Miniature Rotary Potentiometer
Type: MOD 148
Conductive plastic track
Completely sealed
50K x2 (Dual)
8719
300 degree rotation
Text printed on one side of the body:
MOD 148
RES 50K
8719
MOD 148
RES 50K
8719
Decoding this old part number proved to be a little difficult, in particular the type of taper which is not indicated by any sort of code on the body.
I took out my trusty multimeter and both pots are definitely log taper not linear. At the same time it seems these are 20% tolerance, based on the track resistance measured across a number of these pots (tolerance is also not clearly indicated on the body)
DIMENSIONS:
Body: 13mm x 13.5mm x 18.75mm Deep
Shaft: 11mm length, 3.25mm diameter, single slot at the end of the steel shaft
PCB mounting, 2 rows of 3 pins
Mounting hole: 5.25mm with one side flat to lock the shaft in place on the panel.
Completely sealed
COSMETIC CONDITION:
Clean and undamaged physically
These potentiometers are packed individually in sealed clear plastic packets
