Taylor model 85A s/n xxx with Instruction manual
Taylor model 85A s/n xxx with Instruction manual
This 90 range multimeter which has a 40 microamp movement is housed in an wooden case.
This instrument was very grubby when I received it and the pointer touched the dial at the left hand end of the scale. Removing the four screws enables the front of the meter to be removed. I was then able to straighten the pointer and bend it slightly to stop it catching the dial.
The movement now worked and the meter appeared to give correct readings on the AC and DC voltage scales. The reistance ranges worked, but the RX100 range gave problems, there seemed to be aleakage across one of the switch wafers which was eventually resolved with switch cleaner and a small brush.
Batteries This model used a rectangular 1.5 volt cell and a grid bias battery with brass sockets which were both housed in a compartment on the unerside of the instrument. I have modified the connections to utilise a 9 volt PP3 battery.
How old is it? I guess this was made in 1946/7, The variable resistor used for zeroing the ohm ranges is an Air Ministry item and the capacitor is marked 10/6 which is probably the date code for week 10 1946.
What is it worth? Mine cost me £ 5.00, so not much! .
