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Does anyone still use an Avo Meter?

alanblaby
Yesterday, I bought, for the bargain price of £15, an Avo Meter 12, ex-RAF, still in its leather box, albeit without leads.

By the side of it was a mint condition Model 9, complete with leads and all accessories in its leather tool roll for £42. I was sorely tempted.

It's hard to believe I was using one of these in the early 90's, they look to be a tool of the 40's and 50's.
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    Chris Pearson:

    . . .

    Dare I say it? We had AVOs at school (first half of the 1970s).


    They didn't just teach us to measure amps, volts, and ohms. We learned about parallax and how to eliminate it; sensitivity of meters; shunts; and more. We also learned to treat instruments with respect!




    Yes, we had at school Crompton meters, with shunts to make them act as ammeters, and series resistors to make them act as voltmeters. We had to learn how to calculate shunt and resistor values to make them work at a given range.


    We learned a lot from them. Not so easy to get these ideas across with a clever little box with range switches. (Which, I suppose, is what an Avo is, but at least you have the analogue scale and can even open it up to see how it works.)


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  • 0
    Chris Pearson:

    . . .

    Dare I say it? We had AVOs at school (first half of the 1970s).


    They didn't just teach us to measure amps, volts, and ohms. We learned about parallax and how to eliminate it; sensitivity of meters; shunts; and more. We also learned to treat instruments with respect!




    Yes, we had at school Crompton meters, with shunts to make them act as ammeters, and series resistors to make them act as voltmeters. We had to learn how to calculate shunt and resistor values to make them work at a given range.


    We learned a lot from them. Not so easy to get these ideas across with a clever little box with range switches. (Which, I suppose, is what an Avo is, but at least you have the analogue scale and can even open it up to see how it works.)


Children
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