Avo multimeter model 72

and Taylor model 128


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.


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. This particular insrument was made for Thorn Television Rentals (TTR) part of the Thorn Group of companies as was AVO at the time. When Thorn bought Radio Rentals in 1968, the two businesses were merged to form Thorn Television Rentals.


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



Unfortunately the meter movement of this instrument in my collection is also open circuit

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. Taylor Electrical Instruments Ltd of Slough was taken over by AVO  Ltd. in 1958. Soon after in 1959 Metal Industries Ltd acquired Avo Ltd, including its subsidiary Taylor Electrical Instruments Ltd and  in 1967 Thorn Electrical Industries took over Metal Industries. It is thought that AVO acquired Taylor because of their meter movements and that Taylor started manufactuing at Dover in the 1970s.

The following is from a 1972/3 trade catalogue.   

 


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