MX Antenna Adapter (MT1000 for APRS)

[neriton]

I've searched the boards and only found some old references to a MX to BNC adapter with ground strap but no other info on it.

I'm trying to convert an MT1000 to use for APRS tracking. I have an old lapel mike to connect to the tracker/gps unit and want to use an external magnet mount antenna. I know the Motorola antenna adapter uses the accessory connector plus the 1/8" connector to SO239 cable. The problem is that you can't connect both the lapel mike and antenna adapter at the same time. Does anyone make a thread-in MX to something (SO239, BNC, SMA) adapter with a grounding strap or do I need to fabricate one? If do find one or make one, can I attach the ground cable to the ground that comes from the lapel mike and connects to the tracker/gps unit?

Has anyone had success using an MT1000 for APRS?

Thanks,
Dan

[Tom in D.C.]

Contact this company in Gaithersburg MD. They take phone orders and credit cards and are reliable.

http://www.therfc.com/

[PETNRDX]

One way is to move a pair of the "contact pins" in a speaker/mic connector to the proper locations to connect to the RF connection pins of the accessory connector.
In other words, adding a short coax pig-tail to your speaker/mic connector.
If memory servers me, I took pins and un-soldered and moved them to make a programming cable that also had a coax for RF out, making a single cable for multi-purpose testing and programming.
I looked at using MT1000'S and HT-600'S for APRS, but decided on using old IC-2AT's instead.
Keep in mind that the speaker output leads on the MT1000 (and HT600's) are both "above ground" and you may may fry something if you ground one side of the speaker driver op-amp by connecting to your APRS board.