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Information on Helper Instruments Two-Way Radio Specific Test Equipment Web page maintained by Kevin Custer W3KKC I know nothing about this equipment so please don't ask!

Helper Instruments Company made equipment to help a radio technician properly maintain radio equipment before the individual tests were incorporated into modern test gear. One example is the ability to test SINAD sensitivity. Helper instruments designed and built the "sinadder" before this function was commonplace on service monitors.

Useful Helper Documents:

	Early Helper Catalog   2.6 MB PDF file donated by Skipp
	Sinad Alignment For Optimum Performance   354 kB PDF This is the writeup that got Helper started - it's a quite readable explanation of the the theory behind SINAD measurement.
	Helper Instruments Catalog   1.43 MB PDF I believe this is the last catalog that Helper released while Bill was still alive.
	Helper Instruments Final Catalog   9.53MB PDF file   Donated by Dennis Casey KØGWK This one details the era when Susan, Bill's daughter, took over the company after Bill passed away.
	Helper Instruments Desktop Reference   322 kB PDF file   Donated by Eric WB6FLY A collection of charts, tone lists, SINAD test procedures, "and an occasional discrete mention of the time saving, money making test instruments by Helper Instrument Company. " We think this is older than the file below although it has the same information in it.
	Helper Instruments Desktop Reference   439 kB PDF file   Donated by John K3KR A collection of charts, tone lists, SINAD test procedures, "and an occasional discrete mention of the time saving, money making test instruments by Helper Instrument Company. " We think this is newer than the file above although it has the same information in it.
	Helper Instruments SM1000 Operator Manual   12.44MB PDF file   Donated by Dennis Casey KØGWK

Link to our Manuals Section for Helper Instruments

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This page initially created 8-27-2023.

The information presented in this web site, on these web pages and in these modifications and conversions is © Copyrighted 1995 - current by Kevin Custer W3KKC and multiple originating authors.