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MOTOROLA GM300 AUDIO PROBLEM | RadioReference.com …

    https://forums.radioreference.com/threads/motorola-gm300-audio-problem.394888/
    MOTOROLA GM300 AUDIO PROBLEM. Thread starter TA5FW; Start date Sep 22, 2019; Status Not open for further replies. TA5FW Member. Joined Mar 10, 2008 Messages 9 Location TURKIYE. Sep 22, 2019 #1 Hello, Using the RICK from the Motorola GM300 UHF devices, I did the repeater. I've detected that the RX receiver radio has a sound problem.

GM300 repair with 2 more defects|Gm300 no audio - …

    https://www.youtube.com/watch?v=VO5E5rNU22Y
    Repairing GM300 with 2 more defectsNo displayNo Receive audioMalfunction Volume Ctrl.Troubleshooting with step by step tutorial#GM300 Repair#Motorola GM300#R...

GM300 Information Page - Repeater Builder

    https://www.repeater-builder.com/motorola/maxtrac/gm300-info.html
    GM300 mobile radios cover the VHF (136-174 MHz in two ranges) and UHF (403-520 MHz in four ranges) bands, with 8 or 16 channels, 12.5 or 20/25/30 kHz channel spacing, and 10, 25, and 35-45 watt power levels. They use the same accessories (loudspeakers, microphones, accessory plugs, power cords, mounting brackets, etc.) as the MaxTracs.

Motorola GM300 Information Page - QRZCQ

    https://qrzcq.com/pub/RADIO_MANUALS/MOTOROLA/MOTOROLA--GM-300%20Information%20Page.pdf
    GM300 mobile radios cover the VHF (136-174 MHz in two ranges) and UHF (403-520 MHz in four ranges) bands, with 8 or 16 channels, 12.5 or 20/25/30 kHz channel spacing, and 10, 25, and 35-45 watt power levels. They use the same accessories (loudspeakers, microphones, accessory plugs, power cords, mounting brackets, etc.) as the MaxTracs.

GM300/M120 - BatLabs

    http://batlabs.com/gm300.html
    9600 Baud Packet Modifications. The GM300 Series are 9600 baud packet capable. They do need a minor modification though. For RX, its no big deal, just take RX audio from PIN 11 of the Accessory Connector and swing JU551 to the (A) position (Flat RX Unmuted).. For TX audio, you will have to run a jumper to the junction of R223, C228, R222 on the RF board to inject the data …

GM300 Mini-Din Adapter, Argent Data Systems

    https://www.argentdata.com/catalog/product_info.php?products_id=169
    Amplification is provided for the transmit audio, and a trimpot allows adjustment of the receive audio level. The SPK jumper can be removed to mute the radio's internal speaker. The GM300's receive audio is provided on both the '9600' and '1200' pins of the Mini-DIN, which is wired as follows: 1 - Transmit audio 2 - Ground 3 - PTT 4/5 - RX audio

Redragon GM300 Gaming Stream Microphone – REDRAGON ZONE

    https://www.redragonzone.com/products/redragon-gm300-gaming-stream-microphone
    1. Patented cool design, full metal made, support circle LED in custom colour. 2. One button, support Volume control & Mute. 3. High-end mic unit, Cardioid, pick up sound from front and both sides, minimize sound from backside. 4. USB plug cable, with USB-B to USB-A connectors, durable and compatible with all desktop computers and laptops. 5.

GM300 Information Page - QSL.net

    https://www.qsl.net/w/w2ymm//downloads/ALLSTAR/Scripts/Channel_steering/GM300%20Information%20Page.htm
    GM300 mobile radios cover the VHF (136-174 MHz in two ranges) and UHF (403-520 MHz in four ranges) bands, with 8 or 16 channels, 12.5 or 20/25/30 kHz channel spacing, and 10, 25, and 35-45 watt power levels. They use the same accessories (loudspeakers, microphones, accessory plugs, power cords, mounting brackets, etc.) as the MaxTracs.

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