Jay-Jay, Resistance decade box

Jay-Jay, Resistance decade box

Manufacturer:- Educational Measurements Ltd, Bitterne , Southampton

Brand :- Jay-Jay Instruments

type:- 1

Description:- 4 x 10 position resistance knobs

Ω x 10000@ 7mA

Ω x 1000 @20mA

Ω x100 @70mA

Ω x10 @100ma

still in use for Calibration of equipment

Source:- My own collection
Purchased  from Wythall Rally late 1990's