Not that tough, three or four resisters and a speaker-mic cable for COS and rx audio. PTT is a ground to TX.
From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Alan Adamson
Sent: Monday, June 18, 2012 12:09 PM
To: 'Stephen - K1LNX'; app_rpt-users@ohnosec.org
Subject: Re: [App_rpt-users] Portable micro-node?
My problem with all of this is the issues with Motorola (and other commercial radios as well) hookup.
The speaker isn't a speaker and ground it's a floating set of two wires and they bias it with voltage, and the PTT and Mic interconnection aren't that obvious either, as you may need to put resistors and caps in line to filter and cause the radio to see the correct voltage so that the PTT enables.
On the GP300's, I don't think you need that adapter as they have a 2 jack location already provided.
I think what I'm going to try, just because I have one and all the parts is my TH-F6A, you can put it in 9600 baud packet mode and get to the discriminator and mod input directly, and it has COR (but alas, it's just connected to the meter, not really to a valid COR on CTCSS)… but I also have a TS-32 laying around so I may make something really small. The radio is way over kill, but hey I have it and it's straight forward to connect up.
Alan
From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Stephen - K1LNX
Sent: Monday, June 18, 2012 12:01 PM
To: app_rpt-users@ohnosec.org
Subject: Re: [App_rpt-users] Portable micro-node?
I've thought about using the same radio, I have an MT2000 and an MTS2000 both VHF that would be perfect for a project like this... I also found these on ebay, might be easier for wiring:
I don't have a RTCM yet, but plan to get one in the near future.
Stephen
K1LNX
From: app_rpt-users-bounces@ohnosec.org [app_rpt-users-bounces@ohnosec.org] on behalf of Peter Elke [pete.elke@esquared.com]
Sent: Monday, June 18, 2012 1:26 AM
To: Alan Adamson; app_rpt-users@ohnosec.org
Subject: Re: [App_rpt-users] Portable micro-node?
Hi Alan,
For UHF I have used Motorola HT1000, MT/MTS2000, and Astro Sabers with the RTCM (and Beagle/Lox), both work well other than that you have to use the speaker’s bias for COS detect. You just need to destroy a speaker/mic cable for the cause.
Pete/wi6h
From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of Alan Adamson
Sent: Sunday, June 17, 2012 1:18 PM
To: app_rpt-users@ohnosec.org
Subject: [App_rpt-users] Portable micro-node?
Ok, so I want to build a portable micro-node for allstar around an RTCM. I have the RTCM know how to configure it, etc… What I just can't figure out is *what radio* to use…. I'd like this to be portable and low power - ala HT.
I've got any number of commercial motorola HT's or a few dual band Ham HT's (specifically thinking the TH-79A that I have laying around)…. So what are you all using and what's easy to hook up? I really don't want another *mobile* radio, that's just too much overkill.
If you would, can you offer hookup directions (not to the RTCM, I know that part), but to whatever radio you are using?
Thanks in advance,
Alan