I think that it could be made to work, but you would have to split
the radio apart and separate the transmitter and receiver and
probably put them in separate RF tight boxes boxes and use
feed-through capacitors and filtering networks.
The boxes would need to be completely shielded and you probably
would need a couple of stages of feed-through capacitors and
choke stages to bring the signals out. If you put the volume
control and squelch control inside the box, that saves three or
four wires.
Motorola uses three feed-through to ground with two series
chokes and completely separated barriers compartments in their
older motrac base stations to keep their VHF stations free of
desense.
I have done a little of this, switching around receivers
from mobiles into motrac base stations to convert them to
repeaterreceivers. I bought the feed-throughs and the
chokes and built the stages.
This is possible, but it really may be more trouble than
it is worth. It probably would be a better idea to find
something else, but start this project as a long term
learning exercise.
Micheal Salem N5MS
Neil McKie wrote:
> You bet ... if it happens you need the diagrams of the Motran, I
> probably have them here.
>
> Best of luck on your connty assigned project.
>
> Neil - WA6KLA
>
>
> Mathew Quaife wrote:
>
>>Hi Niel, yes I think it is the Motran, as there are no tubes in this critter
>>at all. But seems more work than it's worth. It was donated for use on the
>>repeater that I am building for the county, will be thier first 2 meter
>>repeater, and it's all out of my pocket. I bought a couple of Regency
>>repeaters, disabled the controller inside and used the transmitter and
>>reciever and connected them to an RLC4 controller, seems to work ok.
>>Thought on the Motorola was to eliminate the need for the external
>>amplifier, but it all matches, so will see if all comes together when I put
>>it on the air here in a few weeks. Thanks for the input.
>>
>>Mathew
>>
>>----- Original Message -----
>>From: "Neil McKie" <[EMAIL PROTECTED]>
>>To: <Repeater-Builder@yahoogroups.com>
>>Sent: Tuesday, March 23, 2004 12:04 PM
>>Subject: Re: [Re: [Repeater-Builder] Motorola Motrac Radio]
>>
>>
>>>Mathew Quaife wrote:
>>>
>>>>This one has the three small transistorized finals on the right
>>>>back side.
>>>
>>> By your description, that sounds like a T43MSN Motran.
>>>
>>>
>>>
>>>>As far as numbers on the unit, don't find anything that meets the
>>>>model numbers that's been mentioned. Might be easier to just
>>>>locate one of the GE Mastr II and work with that. Right now I
>>>>have the regency up and running, but the thougth was if I could
>>>>convert a 100 watt radio, could do away with the amplifier.
>>>
>>>>Thanks to the many that answered the call on this radio, but soulds
>>>>like more headache than it would be worth. I do know that the
>>>>manufacutre date on it is 1968, if that tells anymore about it. But
>>>>let me ask, when we talk tubes, are we referring to glass tubes, or
>>>>the later solid state tubes they came out with.
>>>>
>>>>Mathew
>>>
>>> Neil
>>>
>>>
>>>
>>>>----- Original Message -----
>>>>From: "JOHN MACKEY" <[EMAIL PROTECTED]>
>>>>To: <Repeater-Builder@yahoogroups.com>
>>>>Sent: Monday, March 22, 2004 4:23 PM
>>>>Subject: Re: [Re: [Repeater-Builder] Motorola Motrac Radio]
>>>>
>>>>
>>>>>A high band motrac would be something like U43LHT or U43MHT, where the
>>>>
>>>>High
>>>>
>>>>>band Motran would be something like U43LLT or U43MSN.
>>>>>
>>>>>mch <[EMAIL PROTECTED]> wrote:
>>>>>
>>>>>
>>>>>>That would be the MOTRAN. They have a boat
>>>>>>load of round transistors in the final area.
>>>>>>
>>>>>>They used the same accessories as the MOTRAC.
>>>>>>
>>>>>>Or are you saying there really were MOTRACs with no tubes?
>>>>>>
>>>>>>Joe M.
>>>>>>
>>>>>>Micheal Salem wrote:
>>>>>>
>>>>>>>Matthew:
>>>>>>>
>>>>>>>There are later versions of the Motrac which would be all
>>>>>>>solid state. A model number for a motrac would start
>>>>>>>with U23, U43, U53, etc. The tube versions would end
>>>>>>>with HHT, for example. I think that the solid state
>>>>>>>version would be a MHT or perhaps an LHT so that the
>>>>>>>solid model would be something like U43MHT.
>
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