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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 audio issues | RadioReference.com Forums
https://forums.radioreference.com/threads/gm300-audio-issues.206396/
I have just installed a GM300 in my 2004 Chevy pickup. When the vehicle is off and the radio is powered up the rx audio is fine. But, when the vehicle is started and running, the rx audio becomes distorted and I am unable to understand what is recieved. Anyone know what the problem could be...
How to repair Motorola GM300 with transmit but no …
https://www.youtube.com/watch?v=n8v6BxOg0As
This video demonstrate how to repair Motorola GM300 with no receive sensitivity& what component parts to be replace. #Gm300 repair#Troubleshooting Gm300#Radi...
Motorola GM300 Information Page
https://qrzcq.com/pub/RADIO_MANUALS/MOTOROLA/MOTOROLA--GM-300%20Information%20Page.pdf
The GM300 RF boards have a local/distant attenuator in the receiver front end. This reduces the gain of the receiver and improves intermod rejection by 10dB. You can put a GM300 RF board into a MaxTrac, but there will be no control of the local/DX circuit, and the radio will have poor sensitivity. The circuit
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 …
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