07-26-2016, 06:07 PM
Hi Mitch,
First time I've seen it too. Looks like the two cables use a bayonet style connector like the base of a #47 lamp. If you open it up you'll find a battery inside which will be dead. Some use the ubiquitous D cell but others use a harder to find 30v cell. If the battery has leaked it may take a little work to sort that out, it is only for the ohms measurement not for any of the voltage measurements. If you do get it going double check the ohms scale for accuracy, if someone has used it to measure voltage with it in the resistance setting it can damage resistors inside the set. Fancy ones have a breaker that trips to stop any damage.
The down side is that nowadays most folks are used to using a digital meter (your VOM will be closer to the original measurement on the paperwork as it load the circuit). VOM are pretty cheap on the 2nd hand market. I picked up two nice ones $5 ea over the years.
I use a VOM (volt ohm meter) and VTVOM (vacuum tube volt ohm meter) to measure low current grid voltages (like in oscillator circuits) and sometimes a digital dvm for resistances cause I'm lazy.
GL
First time I've seen it too. Looks like the two cables use a bayonet style connector like the base of a #47 lamp. If you open it up you'll find a battery inside which will be dead. Some use the ubiquitous D cell but others use a harder to find 30v cell. If the battery has leaked it may take a little work to sort that out, it is only for the ohms measurement not for any of the voltage measurements. If you do get it going double check the ohms scale for accuracy, if someone has used it to measure voltage with it in the resistance setting it can damage resistors inside the set. Fancy ones have a breaker that trips to stop any damage.
The down side is that nowadays most folks are used to using a digital meter (your VOM will be closer to the original measurement on the paperwork as it load the circuit). VOM are pretty cheap on the 2nd hand market. I picked up two nice ones $5 ea over the years.
I use a VOM (volt ohm meter) and VTVOM (vacuum tube volt ohm meter) to measure low current grid voltages (like in oscillator circuits) and sometimes a digital dvm for resistances cause I'm lazy.
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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