Simpson 260 Series 2A

Analog - VOM


There is not much information available about the Model 260 Series 2A.

It was made between the 1940's and 1950's. 

The probe jacks accept the pin type leads, Part Number 0-008375.

The current Catalog Number 02055 leads  will work with this model.

This is the first model to use the Series number/letter on the meter face.

The only difference I can see between this an a regular Series 2 is the "DB" scale on the meter face,

However, Mark Z. correctly points out that the AC rating is now 5,000 Ohms Per Volt instead of 1,000.

This more sensitive meter movement will now be standard for all following series.

This Series 2A meter shows "DB" from - 20 to +10, the Series 2 shows -12 to +3.

The Operator's Manual can downloaded here.

Controls include: Ohms zero adjustment, AC - DC - Output, a 12 position Function / Range

selector switch, and  six recessed probe jacks. The ohms adjust is now located on the right

side of the case and will remain there for the following models.

This is the first model to use the engraved lettering and the now familiar black molded case.

Back view with resistor cover on and off. A lot of hand wiring here, each resistor has it's own little hole.

More inside views linked below.

The batteries used in this model are a single "D" cell, plus four "AA" batteries, there are two "AA"

below the "D" and one "AA" on each side. There are no fuses or calibration trim pots.

Case Size: 5 " x 7 " x 3"  -  Weight: 3 Pounds

Simpson 260 Series 2A Specifications


Ranges 2.5V, 10V, 50V, 250V, 1000V

Accuracy 3% of full scale * Sensitivity 20K ohms per volt


Ranges 2.5V, 10V, 50V, 250V, 1000V

Accuracy 5% of full scale * Sensitivity 5K ohms per volt

Rated Circuit-To-Ground Voltage Unknown


5 Ranges 0, +12, +26, +40, +52dB


Ranges 100μA, 10mA, l00mA, 500mA

Accuracy Unknown


Ranges Rx 1, Rx 100, Rx 10K

Accuracy Unknown

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