For more information, please check out these links:
http://motorolarsssoftwareprogramming.blogspot.com/2014/06/motorola-radius-gm300-with-windows.html
http://www.repeater-builder.com/motorola/maxtrac/gm300-info.html
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https://www.youtube.com/watch?v=WP5HwkijmaQ
"The alarm" is a Russian military commandment network servicing the Western military district. Began operation on May,16th,2019.
https://priyom.org/military-stations/russia/the-alarm
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https://www.youtube.com/watch?v=dr_amWwTtag
I may be chasing ghosts on this one. I am thinking the circuit is switched off causing zero volts. Could be right, might be wrong, but in the end its a learning curve regardless! ;-)
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https://www.youtube.com/watch?v=GEE78FwKo_Y
Nothing like sitting back spinning the knob tuning in overseas radio stations on a radio you built yourself from scrap parts.
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https://www.youtube.com/watch?v=Ik85QmIamCA