Hey Michael ...
I think you got it wrong this time, not a first but almost ...
Motorola Manual Part Number 68P81045E70-O-01 dated 8/1/82:
Page "Receiver Alignment Procedure" Motorola No. PEPS-26663-C
Left side of the page - bottom:
F R E Q U E N C Y C A L C U L A T I O N S
FREQUENCY (MHz) CALCULATION
----------------- -------------
Fc - 10.7
136-174 Fo = -----------
3
Where Fo = crystal frequency; Fc = carrier frequency
---------
instruction manual revision WMR-0070 dated 12-17-82
Page "Receiver Alignment Procedure" Motorola No. PEPS-26663-C
... says the same thing ...
Looks like low side injection to me.
Go to bed Mike .... it's 1:20am your time ... 73,
Neil - WA6KLA
Mike WA6ILQ wrote:
>
> At 02:52 PM 11/29/04, you wrote:
>
> >I have read a few comments in the past about the need for changing
> >the crystal from one side of the operating frequency to the other in
> >a Mitrek.
> >I am not sure I will be wording this properly so please be patient.
> >
> >I will have two repeaters at the same site which are Mitrek
> >conversions.
> >One repeater is on 145.210 MHz (neg. offset) and the other repeater
> >is on 147.240 (pos. offset).
> >At present the 145.210 repeater is not a Mitrek but when I am
> >finished the conversion it will be replaced by the second Mitrek.
> >
> >I would appreciate comments re experiences (ie problems) encountered
> >if both receivers have the same frequency crystal.
> >
> >thanks
> >
> >Bruce, VE1II
>
> The standard 136-174Mhz Mitrek configuration uses high
> side injection, with a 10.7 MHz IF.
>
> And remember, the 147.24 repeater will be listening
> to 147.84, and the 145.21 repeater will be listening to
> 144.61 - with over 3mhz of RX to RX separation I don't
> see a problem at all.
>
> And if you are referring to the two repeaters being on
> the same channel simultaneously, well, that's what
> two different PL tones are for - set up repeater 1 on
> tone A and repeater 2 on tone B.
>
> Or am I not understanding the question?
>
> Mike WA6ILQ
>
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