Doug,

Although I have never seen one, I do know that Motorola made some
full-duplex Mitrek radios- but a Mitrek repeater is a new one on me.  Is
this unit actually a repeater, that is, does it retransmit any signal it
receives?  Or is it simply able to receive on one frequency while
transmitting on another?  If the latter, it is not a repeater per se, but
simply a full-duplex radio used in a public-safety application with a
handset.

One method I often use to track down a service manual for oddball equipment
like this, is to look at the channel elements to learn what frequencies were
used.  I then contact the seller to learn the history of the radio, and
perhaps where in the country it was used.  A search of the FCC Land Mobile
Radio database sometimes reveals what licensee(s) used those frequencies in
that area.  Finally, if I'm lucky so far, I can sometimes contact the radio
shop for that entity and talk them out of the service manual that might
still be on a shelf or filed away.  I always offer to send a check up front,
for more than the cost of postage, to make it worthwhile to unload a manual
that is no longer needed.  Even if the shop won't part with the manual, just
knowing the complete part number of the document is important information.

Above all, I never ask anyone to "just make a copy" of a manual, because
that might tie someone up at a copier or scanner for an hour or more, and
the pages that result are often difficult to make any sense of unless they
are taped together.  Maybe if it only is a few pages, but anything over that
goes to a graphics shop for scanning or copying.  Although the result is a
complete and high-quality reproduction, the total cost (including two round
trips to the graphics shop) might be three or four times the cost of an
original manual- which sometimes is still available!  But, I digress...

I looked up the your model number in my cross-reference manual, without
finding a listing.  Perhaps one of the list's Mitrek specialists can provide
some insight into this unusual radio...?

73, Eric Lemmon WB6FLY


-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of n3dab
Sent: Saturday, March 25, 2006 8:46 AM
To: [email protected]
Subject: [Repeater-Builder] Info wanted on Mitrek VHF rptr.

73's  to the Group

The following info appears on a MITREK VHF Mobile repeater.  This is 
a factory (Motorola) built product, NOT an after market modified 
mobile radio.   Can anyone provide any information or documentation 
on this repeater ?  Local searches thru Motorola shops have produced 
nothing.

On the ID plate:   Prim. Pwr. 12v   Motorola Canada Ltd.
                                    Doc. No.   109191038X
                         MITREK     Type JJA   Watt 2-10
                                    Mod. No.   MX23JJA1106BAZ 
                                    Ser. No.   533PKN1018
                                    Motorola Inc. Made in USA

On chasis behind handle:            HUD1052CPR
On the PC bd. near Rcvr.elements:   HLD4082BPR
On frame near Tx elements:          HLD1002BPR
On Controller/PL bd.:               TKN9539BAZ
On PA bd.:                          HLD4124APR   and   TLD5591BAZ

Label on top cover reads: " Mobile Communications" and has a "AGT" 
logo.  Probably installed by the service shop.

The Rcvr is fed thru the SO239 on the front of the Chasis, the Xmtr 
is fed out a SO239 on the left rear of the heat sink casting and the 
recess for it was part of the casting process.

This repeater appears to function with the standard control head and 
cable, though I don't have the original but have had it bench tested 
for operation.

TIA for any and all help

Doug   N3DAB 









 
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