[Repeater-Builder] UHF GM300 (lnk radio)
I would like to use a UHF GM300 as a link radio for my system. However, 25 watts is a bit overkill for my application. Has anyone had any luck with reducing the power on one of the radios? I would assume that one could disable the amplifier and use just the exciter, but I am not sure of the procedure. Anyone care to share? Thanks Steaven, W4YI Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] UHF GM300 (lnk radio)
25 Watt radios will turn down to at least 10 watts or less without any problems. If you want to use just the exciter (a few hundred milliwatts I think), you would probably want to make your own t/r switching and just connect directly to the RF board. Steaven Rogers, W4YI wrote: I would like to use a UHF GM300 as a link radio for my system. However, 25 watts is a bit overkill for my application. Has anyone had any luck with reducing the power on one of the radios? I would assume that one could disable the amplifier and use just the exciter, but I am not sure of the procedure. Anyone care to share? Thanks Steaven, W4YI Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] UHF GM300 (lnk radio)
It just unplugs. You will need a special cable to plug back into the circuit board to plumb the RF out to the outside world. It is a standard Mot part, but I do not know the part number. Get yourself a service manual, the part is listed in there... Good luck! Mike Steaven Rogers, W4YI wrote: I would like to use a UHF GM300 as a link radio for my system. However, 25 watts is a bit overkill for my application. Has anyone had any luck with reducing the power on one of the radios? I would assume that one could disable the amplifier and use just the exciter, but I am not sure of the procedure. Anyone care to share? Thanks Steaven, W4YI Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] UHF GM300 (lnk radio)
I've not been inside one but I was told that the M-123 and the GM300 are a Maxtracs with new outer skins and different software. Maxtrac exciters are weak - less than 80mw if I remember correctly. I've seen 2w Maxtracs in surplus, in fact a couple sold on eBay a while back for around $50. You might be able to find a manual for the 2w radio and see how the designers did it, then copy the changes. Modifying a Maxtrac-family radio for low power out might make a good article for repeater-builder. Mike WA6ILQ At 05:25 AM 9/3/04, you wrote: I have had luck programming them as low as 4 watts without them becoming dirty or unpredictable. Below that, I would start removing stages. Kevin Custer W3KKC Steaven Rogers, W4YI wrote: I would like to use a UHF GM300 as a link radio for my system. However, 25 watts is a bit overkill for my application. Has anyone had any luck with reducing the power on one of the radios? I would assume that one could disable the amplifier and use just the exciter, but I am not sure of the procedure. Anyone care to share? Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
