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.
	Replacing the Dallas Memory Module In the MaraTrac   By Scott Withrow KC9LQV Radios that use the Dallas NVRAM will be losing their memory when the battery goes dead. They have about a 20 year lifetime, so any radio made prior to about 1992 will have this problem and the Dallas chip will need to be replaced. This article tells you what to do about it. While aimed at the MaxTrac, the MaraTrac suffers the same ailment.

Manuals, Brochures, Guides, and other printed material:

	MaraTrac VHF Low-Band Service Manual   6880102W95-O   10 MB PDF   Donated by Eric Lemmon WB6FLY.
	MaraTrac VHF 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.
	MaraTrac VHF High-Band Service Manual   6880102W18-A   8.2 MB PDF   Donated by Eric Lemmon WB6FLY.
	Radius M400 Service Manual   6880901Z56-O   16.6 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. For all intents and purposes, the M400 radio is identical to the MaraTrac.
	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.