Avo multimeter model 72

This is a more accurate and virtually identical meter to the earlier model 71. The 1Amp fuse has been omitted and a 2.5 kV socket has been added but otherwise is much the same.

model72



Unfortunately the meter movement was found to be open circuit but as I also have a model 71 with a good meter but several faulty and or  open circuit resistors I have exchanged the meter and scaleplates to get a working instrument.

What does TTR stand for?

When Thorn bought Radio Rentals in 1968, the two businesses were merged to form Thorn Television Rentals.


taylorss

The Taylor model 128 is almost identical except it does not have the 2.5Amp or 2500 V ranges


You will find more information here about these instruments and other similar models. AVO produced a range of the smaller multimeters such as this which are described here 

 

AVO produced the "70 series" range of analogue pocket meters with 2000 Ohms/Volt sensitivity and 3 inch scale lengths at the beginning of the 1970's. The following is from a 1972/3 trade catalogue.   

 


For further information have a look at my pages on similar AVOmeters here