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the 260 portable VOM was the standard for the industry for many years. its still available today. cost from 205 to 227. I had one of these on my bench. we all did.
The front on the Simpson 260-6 changes from the Series 5, by the addition of a "transit" position
at the 500 MA position on the function switch. The 50 Micro Amp jack is also marked as 250 MV.
The Series 6 also has a +1 Volt D.C. jack and uses the 0 -10 D.C. Scale.
The A.C. / D.C. 1000V jacks are now combined into one
The Simpson 260-6 has the Taut Band Suspension dial.
The 260 Series 6 is the first to have the three Amp-Clamp scales.
Controls include: Ohms zero adjustment, AC - DC Voltage selector switch,
and a 12 position Function / Range selector switch. Eight recessed probe jacks.
The off or "transit" position is at the 500 MA location.
I used this for accurate resistance measurements. for AC/DC voltage i used a DVM. on ohms X 1 scale there was 1.5VDC between the probes. I used this source to see if transistors would tun on or off.
here's mine. my late brother N law gave this to me. its used but not used up. still works great. I use now for electrical problems around the house.