This is the Potomac Instruments Equipment Section of
The Broadcast Archive

Maintained by:
Barry Mishkind - The Eclectic Engineer
Last updated 11/18/14

Potomac Instruments
7309 Grove Road Unit D
Frederick, Maryland 21704

Potomac Instruments supplies audio test and RF monitoring gear.

Since its founding in 1968 it has become best known for the Field Intensity meters (FIM-21, FIM-41,and FIM-71) and the audio test sets (AG-51 and AA-51). 

FIM-21 Field Intensity Meter

.54 MHz to 1.61 MHz


FIM-41 Field Intensity Meter

.54 MHz to 5.0 MHz

FIM-4100 Field Intensity Meter

.52 MHz to 5.1 MHz

FIM-71 Field Intensity Meter

VHF  45-225 MHz

FIM-72 Field Intensity Meter

UHF 450-960 MHz

SD-31 Frequency Generator
 and Detector
AG-51 Audio Generator
AA-51 Audio Analyzer

TU-16 Remote Metering
AM-19 Antenna Monitor
AM-19D Antenna Monitor

1900 Antenna Monitor
QA-100 QuantAural
Audio Program Analyzer 



Would you like to know more about  

Or, just need to get BACK TO THE MAIN PAGE?

Thanks for visiting ... I hope you find the site interesting!

Copyright 1993-2010, 2011  by Barry Mishkind. This material on this site should not be reproduced or reposted in whole or part without express approval.

It would be a kindness if you'd take a moment and let me know who you are and what interests you have. If you can share some information, or even a picture, that would be great! Just use the address below. Thanks. (Please note: Due to the huge amount of spam on the internet, it would be extremely helpful if you would use something like [Oldradio] in your subject line, so the filters don't get in the way.)

An important note about this resource:

We have used many sources, including FCC files, university lecturers, historical publications and more, and have tried to be as accurate as possible, not repeating many of the myths of the industry (such as the Uncle Don Story) nor histories "manufactured" by promotion departments. However, I am not perfect, and may well have overlooked something. If you do see an error or omission, please let me know.

The accuracy and expansion of this resource depend upon our SHARING our efforts.

        Barry Mishkind