Simpson 303 - VTVM

Vacuum Tube Volt Meter

Special Guest Meter Page

The Simpson 303 is actually a Vacuum Tube Volt-Ohmeter.

Inputs are made using BNC cables.

In 1957 this model listed for $68.00, the roll top case version was $76.00.

A copy of the Simpson 303 manual can be downloaded here.

Controls include: Ohms zero adjustment, AC - DC Voltage / Ohms selector switch,

and a 5 position Ohms Range selector switch.

Back view of the circuit board and view of the rear of the case.

A side view of the component layout.

The other side, component layout. The battery used in this model are a single 1.5 volt cell.

Line power is 115VAC 60Hz.

Also in Mark's collection is this nice looking Hickok 209A Vacuum Tube Volt - Ohm - Milliammeter.

This model was available from the early 1950's to the mid 1960's, and sold new for $133.00 in 1951.

A copy of the Hickok 209A manual can be downloaded here.

Simpson 303 VTVM Specifications


Ranges 1.2V, 12V, 60V, 300V, 1200V


Ranges 1.2V, 12V, 60V, 300V, 1200V


5 Ranges -20 to +63dB * Reference 0dB= 1mW into 600Ω


Ranges Rx1, Rx100, Rx1K, Rx10K, Rx1MEG

All photographs shown on this Guest Meter Page are:

 Copyright 2009 - Mark Zacharias - All Rights Reserved 

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