<div dir="ltr"><div>Programming these things will be the problem. You will need a Radio Interface Box (RIB) to connect the radio to a computer. Then you will need the Motorola RSS software (pricey and limited availability) to configure the radios. There are tons of these radios on eBay for $5-$50. Unless you have the RIB and proprietary software, all you have are conversation pieces and doorstops. I've fought this battle with Motorola equipment numerous times over the years.<br></div><div><br></div><div>Michael WA7SKG</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Sep 24, 2018 at 1:51 PM Robert Bruninga <<a href="mailto:bruninga@usna.edu">bruninga@usna.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I had forgotten that they first have to be programmed to frequencies...<br>
then we need to understand what kind of serial data in the data port does<br>
what and how or what gets to the other end...<br>
<br>
<br>
Bob<br>
<br>
-----Original Message-----<br>
From: aprssig <<a href="mailto:aprssig-bounces@lists.tapr.org" target="_blank">aprssig-bounces@lists.tapr.org</a>> On Behalf Of John Gorkos<br>
Sent: Monday, September 24, 2018 4:38 PM<br>
To: <a href="mailto:aprssig@lists.tapr.org" target="_blank">aprssig@lists.tapr.org</a><br>
Subject: Re: [aprssig] APRS on 70CM using a hundred "free" UHF radios<br>
(Robert Bruninga)<br>
<br>
Geez, that thread is basically a treatise on Why I Hate The Internet, and<br>
Most Human Beings. Just chock full o' love and help.<br>
<br>
That being said, I just bought two of these radios on Ebay for $20.<br>
We'll see what I can do with them.<br>
<br>
AB0OO<br>
<br>
On 9/24/18 12:52, John D. Hays wrote:<br>
> <a href="https://forums.radioreference.com/motorola-forum/179932-motorola-vrm-6" rel="noreferrer" target="_blank">https://forums.radioreference.com/motorola-forum/179932-motorola-vrm-6</a><br>
> 50-a.html<br>
><br>
> On Mon, Sep 24, 2018, 12:06 radio nn4qq <<a href="mailto:radio.nn4qq@gmail.com" target="_blank">radio.nn4qq@gmail.com</a><br>
> <mailto:<a href="mailto:radio.nn4qq@gmail.com" target="_blank">radio.nn4qq@gmail.com</a>>> wrote:<br>
><br>
> This EBAY post includes a few pictures<br>
><br>
><br>
> <a href="https://www.ebay.com/p/Motorola-VRM-650-Data-Mobile-Radio-F3454a-VRM65" rel="noreferrer" target="_blank">https://www.ebay.com/p/Motorola-VRM-650-Data-Mobile-Radio-F3454a-VRM65</a><br>
> 0/1311778416<br>
><br>
><br>
><br>
> On Mon, Sep 24, 2018 at 2:48 PM Ross Whenmouth <<a href="mailto:ross@topwire.co.nz" target="_blank">ross@topwire.co.nz</a><br>
> <mailto:<a href="mailto:ross@topwire.co.nz" target="_blank">ross@topwire.co.nz</a>>> wrote:<br>
><br>
> The VRM650 is an RD-LAP machine, configured ex-factory for<br>
> either 9.6 or 19.2 kbps (12.5 or 25 kHz channelisation<br>
> respectively).<br>
> I don't know enough about RD-LAP, but presumably, you will be<br>
> able to encapsulate AX.25 packets inside of RD-LAP packets?<br>
><br>
> If the amateur community gets enough of these radios to make it<br>
> worth while, it is probably within the realms of feasibility<br>
> (with considerable effort) to reverse engineer the VRM650 and<br>
> write a "ham" firmware for it "from scratch" which speaks AX.25<br>
> (and doesn't have copyright issues with Motorola service<br>
> software)<br>
><br>
> 73<br>
> Ross Whenmouth ZL2WRW<br>
><br>
>> Apparently the Motorola VRM650 UHF data radio should be<br>
>> available for almost free by the hundreds.<br>
>><br>
>><br>
>><br>
>> These are Motorola VRM650 modems which I think are a 40 Watt<br>
>> MCS2000 radio with a different faceplate and only a DB9 rs232<br>
>> port.<br>
>><br>
><br>
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</blockquote></div>