I seem to remember the GP300 having a connector at the bottom for optional add-on boards, like aftermarket signalling and such.
Does anyone have the pinout for that?
And does anything need to be enabled in the radio?
Thanks.
GP300 for low-profile repeater transmitter/receiver?
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GP300 for low-profile repeater transmitter/receiver?
73 DE KC8RYW
Random Motorola Part Number:
SYN1894B - V3m Sprint-branded Battery Cover
Random Motorola Part Number:
SYN1894B - V3m Sprint-branded Battery Cover
- tsunami_australia
- Posts: 159
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Re: GP300 for low-profile repeater transmitter/receiver?
If you're looking at making it a repeater wouldn't you be better just to hook it to a small controller of some sort externally?
Re: GP300 for low-profile repeater transmitter/receiver?
This should help:
http://www.w8ak.com/portrptr/index.html
W8AK has made a repeater out of GP300's and describes how he did it.
http://www.w8ak.com/portrptr/index.html
W8AK has made a repeater out of GP300's and describes how he did it.
Bill, WD9CMS
444.775 PL131.8/NAC293
927.900 PL131.9/NAC293
444.775 PL131.8/NAC293
927.900 PL131.9/NAC293
- jnglmassiv
- Batboard $upporter
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Re: GP300 for low-profile repeater transmitter/receiver?
Are you talking about a connector inside the radio, Jonathan?
The GP350 (which I thought had the same guts as the 300) had what they called the AVS Advantage port or something inside.
I have an inverter board for the 350 but I never did get it working last I tried, um, 10.5 years ago:
http://batboard.batlabs.com/viewtopic.php?f=1&t=29028
The GP350 (which I thought had the same guts as the 300) had what they called the AVS Advantage port or something inside.
I have an inverter board for the 350 but I never did get it working last I tried, um, 10.5 years ago:
http://batboard.batlabs.com/viewtopic.php?f=1&t=29028
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Re: GP300 for low-profile repeater transmitter/receiver?
I'm looking to connect it to a DMK URIx sound fob dealie to use app_rpt.tsunami_australia wrote:If you're looking at making it a repeater wouldn't you be better just to hook it to a small controller of some sort externally?
73 DE KC8RYW
Random Motorola Part Number:
SYN1894B - V3m Sprint-branded Battery Cover
Random Motorola Part Number:
SYN1894B - V3m Sprint-branded Battery Cover
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- Posts: 1747
- Joined: Fri Dec 28, 2001 4:00 pm
Re: GP300 for low-profile repeater transmitter/receiver?
Doesn't really help because there's no schematics of where they tapped the discriminator or where they found a place to inject flat tx audio.wd9cms wrote:This should help:
http://www.w8ak.com/portrptr/index.html
W8AK has made a repeater out of GP300's and describes how he did it.
73 DE KC8RYW
Random Motorola Part Number:
SYN1894B - V3m Sprint-branded Battery Cover
Random Motorola Part Number:
SYN1894B - V3m Sprint-branded Battery Cover
Re: GP300 for low-profile repeater transmitter/receiver?
Motorola built a repeater that uses GP300 radios in it. No real mods to the radios. They do not use a 'disc tap' or flat audio'.
Systel SE Repeater. http://batboard.batlabs.com/viewtopic.php?f=10&t=66093
I have a few in service and the SM.
Systel SE Repeater. http://batboard.batlabs.com/viewtopic.php?f=10&t=66093
I have a few in service and the SM.