• To anyone looking to acquire commercial radio programming software:

    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

    If you are having trouble legally obtaining software please state so. We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request.

    To obtain Motorola software see the Sticky in the Motorola forum.

    The various other vendors often permit their dealers to sell the software online (i.e., Kenwood). Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. Often the Kenwood software is less than $100 so don't be a cheapskate; just purchase it.

    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

    This is a large and very visible forum. We cannot jeopardize the ability to provide the RadioReference services by allowing this activity to occur. Please respect this.

Trash-picked GM300 repeater setup

W

wsed833

Newbie
Joined
Feb 5, 2025
Messages
2
Location
Greenville, SC
I pulled a repeater setup from e-cycling recently. It included a Motorola repeater interface (with keypad dangling by a couple wires) and two GM300 units. These are UHF. I managed to get a copy of the Motorola software and, having done programming for my Bearcat scanner, TK-7180, and a couple of GMRS radios, I found my way around.

I knew to change the mode over from REPEATER and managed to program in some local public safety frequencies for scanning. Also changed signaling to MDC-1200 in case that helped me out, and set squelch to Carrier.

These have blanking plugs, no mic handsets. (I am using them for scanning only, like my TK-7180 for AAR frequencies.) My problem is this: I get no audio from the internal speaker (beeps, monitor squelch, zip) unless I connect the repeater interface to the back of the radio. Then it beeps like it should. I have yet to hear any Rx so I don't know for sure if I can get them, but I assume if I can hear static when I press MONITOR that I'm good to go.

I'm sure there is a setting in the software I can change to get that speaker working sans repeater interface. Right? And should I change any other settings to help my cause of recycling an old GM300 into a simple scanner?

Edit: my area of expertise is data science, conventional IT, and networking. Radio is a new area for me. Consider me a n00b.
 
You must log in or register to reply here.

Similar threads

A
Constant tone on repeater transmit freq
Replies
7
Views
529
akhnaten
A
sjaltavilla
"Excessive Number of Collided Packets" on SLR5700 Repeater
Replies
5
Views
453
sjaltavilla
sjaltavilla
T
SLR Repeater error on log: Fan Alarms
Replies
4
Views
410
tropiradio
T
W
MotoTRBO CPS2 out of band
Replies
5
Views
557
WJ1D
W
E
Help With Repeater
2
Replies
27
Views
2K
speedway_navigator
S
Top