[Motorola] Portable/Suitcase Repeater

Thu, 6 Mar 2003 01:24:34 -0500

Glenn,

I have this machine in pieces at the moment for easy testing and repair.  The unit was not rendered inoperable before it's departure from service.  In fact when i'm able to make it transmit (into a dummy load) it still does so in DES, so it still has an intact key of some sort.  The radios are most definetly crystal controlled, i've been fooling with them trying to get them back in the right order.  The radios are without cases, they are circuit board only and mounted within the case that way.  Also, only the required parts are on the boards, the receiver does not have a PA or transmit module and vice-versa.  For more information about what I need and how far i've come with it's repair, see this link:

http://batboard.batlabs.com/viewtopic.php?t=13181

Thanks,

Shawn

---------- Original Message ----------------------------------
From: Glenn Little WB4UIV <[email protected]>
Reply-To: [email protected]
Date:  Wed, 05 Mar 2003 23:21:51 -0500

>Shawn
>
>It has been my experience with MX-3xx radios that to convert from one range 
>to another requires the replacement of the PA modules in the transmitter 
>and the receiver front end as a minimum. Usually the filters have to be 
>changed also. With the correct test equipment and a lot of time, the 
>modules could possibly be converted. At $5.00 each for a complete radio at 
>the hamfests, it is hardly worth the effort to do a conversion. Motorola no 
>longer supports the MX-3xx and most users are dumping them onto the surplus 
>marker.
>
>This looks like a synthesized radio part number. Do the radios have MX300S 
>in red on the top of the radio? If so, do the radios still have the memory 
>and processor installed. From the frequency range, this was a federal 
>radio. For them to legally dispose of the radio it has to have the channel 
>determining elements removed. On the synthesized radio this would be to 
>remove the memory from the top of the processor. In a lot of cases, the 
>tech also removed the processor.
>
>I wish you luck! I might have some of the correct range modules if you find 
>that you really want to proceed.
>
>73
>Glenn
>WB4UIV
>
>At 12:48 AM 3/5/03 -0500, you wrote:
>>Anyone have a service manual for a model P44SXS3180BT repeater based on 
>>the MX300 portable?  I have one in the 408-413 range and would like to get 
>>it running well and maybe tuned to the 440MHz range.
>>
>>Thanks,
>>
>>Shawn
>>KB8UDE
>>
>>
>>
>>
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