Hello ...
You mentioned in an earlier e-mail the model number C53MHB-3100BR
- I am looking at the manual, Motorola Part number 68P81005E75.
Matt wrote:
>
> If it's possible to do this conversion and I end up doing it, this
> repeater won't see that much usage compared to a lot of other ham
> repeaters...it's just for a small group of people who I don't think
> will abuse it *too* much...but anyway, here's what I found in
> looking at it again:
>
> TKN6413A - on one of the wire bundle connectors going from power
> supply to exciter
... Part number of the cable assembly in the power supply.
> PT7 - red, stamped on power supply near bottom
Possibly an inspection stamp?
> TLN8847A1 - on small circuit board on back side of power supply
The "Private-Line" Oscillator & Delay (Encoder) Circuit Board.
> 25D84561A01 and 5247338 - on the larger of the two black
> transformers
The main power supply transformer part number.
The 524 is the manufacturer number (who made it for Motorola)
... the 7338 is the year (1973) and week (38th) the transformer
was manufactured.
> 27E83972GQ5 - on upper part of power supply, on side of chassis
27E ... is a chassis part number.
Power Supply Model Number is most likely TPN1068AC
Transmitter Model Number is most likely TTD1673AA
Receiver Model Number is most likely TRD1742AA
>
> Hopefully, out of those numbers, at least one of them is meaningful
> and provides the info you need. I'll look forward to your reply.
>
> Thanks,
>
> Matt
Continuing ...
There are two other specific models of the somewhat similar radio:
C53MHX at 55 watts output -
C63MHX at 85 watts output -
C73MHX at 100 watts output -
All three are "Compa-Station" Base Radio, Continuous Duty
C73MHY at 100 watts output - "Compa-Station" Repeater RT
Both use the same power supply TPN1073AA and the 24D84948A01
Main Transformer
Pictures in both manuals shows a blower assembly attached to the
transmitter heat sink.
The part number of the C5/6/73MHX Manual is 68P81008E60 / 10/24/69
The part number of the C73MHY Manual is 68P81008E65 / 10/24/69
>
> --- In Repeater-Builder@yahoogroups.com, Neil McKie <[EMAIL PROTECTED]>
> wrote:
> >
> > Before you get too far into this, please note Motorola made
> > three versions of the power supply you may be currently looking
> at.
> >
> > Most likely, the power supply you have there is the intermittent
> > duty version. The part number of the power transformer and/or
> the
> > power supply model number will tell you for certain.
> >
> > Intermittent duty is a 20-25% transmit / 75-80% receive ...
> meaning
> > the power supply won't survive when used as the so-called typical
> > ham radio repeater - where close to a 100% transmit duty cycle
> > should be expected.
> >
> > Please post the power supply model numbers (all you can locate -
> > rubber stamped on the chassis) and the power transformer part
> > number too if possible.
> >
> > Hope this helps,
> >
> > BTW, I have the manuals on all three power supply chassis'.
> >
> > Neil - WA6KLA
> >
> >
> > Matt wrote:
> > >
> > > Hi. I was given a Motorola Motrac base station...it's model #
> > > C53MHB-3100BR, and comes in the short cabinet, with card cage,
> etc.
> > > I was looking at it earlier today and see that there's a place
> for a
> > > Squelch Gate card and Tone Decoder card in the card cage, as
> well as
> > > a spot in the bottom of the unit where it looks like a second SO-
> 239
> > > connector could be mounted. There are also separate cables
> running
> > > to the bottom of the cabinet from the TX and RX sections.
> > >
> > > This leads me to believe that this unit was made with the
> potential
> > > for conversion to a repeater station. My theory is that I could
> > > stick in one of my extra Squelch Gate cards, make two separate
> > > connectors for TX and RX, and do something to make the receiver
> stay
> > > active while the TX is running, and it should work.
> > >
> > > Has anyone done this before? Any suggestions, advice, notes, etc?
> > >
> > > Thanks,
> > >
> > > Matt
> > >
>
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