Forum Discussion
Salvo
Dec 21, 2013Explorer
You're now talking about high-end analog meters. Your standard analog ac voltmeter input impedance (like Simpson 260) is 5K ohm/V. Those are the meters I was talking about.
My first high-impedance multimeter was the EICO 239 which I built from a kit. That was back in about 1971. I think that has a j-fet input stage. Still have that meter sitting on shelf by my workbench. Don't use it though. I do however use a 1945 era meter called Multavi II.

The HF meter I mentioned does not have a sliding analog scale. The Fluke 77 has one, but I never pay attention to it. If voltage is changing then I hook up the scope.
Now there's something the OP can get hubby. I'll take a digital storage oscilloscope for xmas. But I don't think I've been that good. ;).
Sal
My first high-impedance multimeter was the EICO 239 which I built from a kit. That was back in about 1971. I think that has a j-fet input stage. Still have that meter sitting on shelf by my workbench. Don't use it though. I do however use a 1945 era meter called Multavi II.

The HF meter I mentioned does not have a sliding analog scale. The Fluke 77 has one, but I never pay attention to it. If voltage is changing then I hook up the scope.
Now there's something the OP can get hubby. I'll take a digital storage oscilloscope for xmas. But I don't think I've been that good. ;).
Sal
SCVJeff wrote:
Thats input impedance, not the meter gender.
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