Maxtrac Radio Audio Mods | Audio-Digital.net

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Motorola MaxTrac / Radius / GM300 Index Page

https://www.repeater-builder.com/motorola/maxtrac/maxtrac-index.html

Getting Discriminator Audio from a 5-pin MaxTrac radio by Scott Withrow, KC9LQV MaxTrac and Radius mobiles with 5-pin accessory jacks are often overlooked because they lack signals such as discriminator (flat) receiver audio. Scott …

Getting Discriminator (Flat) Audio Out of a MaxTrac 5-pin ...

https://www.repeater-builder.com/motorola/maxtrac/maxtrac-discr-audio.html

This article shows the circuitry, my board, and installation in an 800 MHz MaxTrac radio that has an HLN5172 logic board, most commonly found in trunking radios. While Scott's purpose was for monitoring ATCS signals, this same modification …

Maxtrac and Radius Mobiles - BatLabs

http://www.batlabs.com/maxrad.html

This radio was basically a stock low band radio, with a modified HLN9313A logic board. The logic board has a larger EEPROM installed to hold the very large codeplug as well as different (VLN5443A) firmware. This modified radio is only able to be programmed with VVN4168A RSS. This is SP Maxtrac RSS that only supports this model.

Cable and Mods for Using 2 Maxtrac Radios as a Repeater

http://ve7it.cowlug.org/maxtrac-rptr.html

Cable and Mods for Using 2 Maxtrac Radios as a Repeater. Project Description. This project is a radio interface cable that is used to connect 2 Maxtrac/Radiusmodels of Mototola VHF and UHF two way radios in such a way that they can be used as a repeater. Mods are done inside the radios to bring a conditioned COS/COR signal out through the mic connector.

6m Maxtrac Modifications - BatLabs

http://batlabs.com/6mmax.html

In working on the 6 meter conversion of a Maxtrac mobile, a few small wrinkles may appear when tuning the PA section. When attempting to flow solder of the collector loop, the radio actually began to loose power as solder was added. The radio started out stock at 52.450MHz with 19.2W output into a Motorola R2001D service monitor.

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