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Hickok Digital Main Meter Conversion

HICKOK 539B/C
DIGITAL MAIN METER CONVERSION
VINTAGE HICKOK SYSTEMS ©
Design by William Eccher

This conversion was designed to meet a growing need to replace the analog main meters that have failed or are failing. It is a relatively inexpensive solution that has value added benefits. Operation is simple with the laser etched instructions right on the face of the meter. For the Gm test you simply multiply the digital meter percentage times the Function Switch
Range. No more trying to find the correct scale, squinting and interpolating the analog meter plus its fast, easy and accurate. Even the gas test instructions are given and the meter reversal is no longer needed as it simply gives a negative digital reading. No
more worries about pegging the needle or worse yet doing permanent meter damage.

The meter assembly has a quarter inch anodized aluminum face plate with 6-32 mounting studs that fit into the existing holes making installation easy. It comes precalibrated to directly replace the analog meter.

In addition we include a laminated picture of the analog meter that has a percentage scale added. Understanding there could be some apprehension in not seeing the old analog meter we felt this could be helpful.