The Motorola MaraTrac Index page

Information and Modification Articles:

An Overview of the Motorola MaraTrac mobile radio by Robert Meister WA1MIK and Jim Kalkowski N1GTL
The MaraTrac is like a MaxTrac on steroids. Up to 99 channels, 100-110 watts, remote-mount. This article shows what's inside a UHF unit and a low band unit. The Radius M400 is similar. There are some MaraTrac scans on the main Motorola page.

Activating the MaraTrac Remote Squelch Pot by Robert Meister WA1MIK
It seems many of these low-band radios come equipped with the remote squelch pot, but the radio doesn't know it's there. This article shows what seems to be the problem and how to fix it.

MaraTrac interface signals for repeater use by Robert Meister WA1MIK
MaxTracs can be used as repeaters, so why not their big cousins? This article identifies the signals available in MaraTracs (More Power!) and suggests an interface method.

MaraTrac Manual Power Control by Robert Meister WA1MIK and Dave Malicki N1OFJ
MaraTracs, like MaxTracs, are often used on frequencies slightly out of their normal ranges. They also suffer the same indeterminate transmitter output power problem. This article shows how to add a manual power control adjustment pot specifically for the MaraTrac.

The Motorola Control Cable Connector Virus by Robert Meister WA1MIK
While this happened to some MaraTracs, it can also happen to a lot of other remote-mount radios that have control head cables and connectors. This article tries to explain which came first: the bent pin or the bad cable connector. It shows the problem and how to fix it.

Brochures, Manuals, Guides, and other printed material:

MaraTrac Low-Band Service Manual 6880102W95-O 25 MB PDF Donated by A. Nony Mous.

MaraTrac Low-Band Remote Squelch Supplement FMR-1735A-1 3.7 MB PDF Donated by Robert Meister WA1MIK, scanned by Eric Lemmon WB6FLY. Supplement for the low-band service manual above.

Radius M400 Service Manual 6880901Z56-O 33.5 MB PDF Donated by Eric Lemmon WB6FLY
This one manual covers all three splits / ranges on low-band, 150-174 MHz VHF, and 450-470 MHz UHF models.

An official MaraTrac VHF sales brochure 1.2MB PDF file.

An official MaraTrac accessories brochure 90kB PDF file.

A transcription of the Advanced Control Head (A7) Operating Manual (fold-out card) 125 kB PDF file.

Scans of the Hand-Held Control Head (HHCH, A5) installation diagram and control cable 185 kB PDF file.

Back to the top of the page
Motorola index
Back to Home

Hand-coded HTML © Copyright 2011 and date of last update by Robert W. Meister WA1MIK.
See the Contact Information on this site's main index page.
This page was created 08-Oct-2011 from stuff on the main Motorola page.

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.

	An Overview of the Motorola MaraTrac mobile radio by Robert Meister WA1MIK and Jim Kalkowski N1GTL The MaraTrac is like a MaxTrac on steroids. Up to 99 channels, 100-110 watts, remote-mount. This article shows what's inside a UHF unit and a low band unit. The Radius M400 is similar. There are some MaraTrac scans on the main Motorola page.
	Activating the MaraTrac Remote Squelch Pot by Robert Meister WA1MIK It seems many of these low-band radios come equipped with the remote squelch pot, but the radio doesn't know it's there. This article shows what seems to be the problem and how to fix it.
	MaraTrac interface signals for repeater use by Robert Meister WA1MIK MaxTracs can be used as repeaters, so why not their big cousins? This article identifies the signals available in MaraTracs (More Power!) and suggests an interface method.
	MaraTrac Manual Power Control by Robert Meister WA1MIK and Dave Malicki N1OFJ MaraTracs, like MaxTracs, are often used on frequencies slightly out of their normal ranges. They also suffer the same indeterminate transmitter output power problem. This article shows how to add a manual power control adjustment pot specifically for the MaraTrac.
	The Motorola Control Cable Connector Virus by Robert Meister WA1MIK While this happened to some MaraTracs, it can also happen to a lot of other remote-mount radios that have control head cables and connectors. This article tries to explain which came first: the bent pin or the bad cable connector. It shows the problem and how to fix it.

	MaraTrac Low-Band Service Manual 6880102W95-O 25 MB PDF Donated by A. Nony Mous.
	MaraTrac Low-Band Remote Squelch Supplement FMR-1735A-1 3.7 MB PDF Donated by Robert Meister WA1MIK, scanned by Eric Lemmon WB6FLY. Supplement for the low-band service manual above.
	Radius M400 Service Manual 6880901Z56-O 33.5 MB PDF Donated by Eric Lemmon WB6FLY This one manual covers all three splits / ranges on low-band, 150-174 MHz VHF, and 450-470 MHz UHF models.
	An official MaraTrac VHF sales brochure 1.2MB PDF file.
	An official MaraTrac accessories brochure 90kB PDF file.
	A transcription of the Advanced Control Head (A7) Operating Manual (fold-out card) 125 kB PDF file.
	Scans of the Hand-Held Control Head (HHCH, A5) installation diagram and control cable 185 kB PDF file.