[Motorola] Quarterly Request:Want to buy - UHF Business dispatcher

[Glen Zook]

There were definitely two major versions of the
"Business Dispatcher" radios.  The first used the
basic design of the old "back pack" (actually had a
large handle, depending on the model either a handset
or microphone, etc.) boards portable.  These were in
highband and lowband versions.  The older units had
"BMT" designators and "CMT" was the designation of the
later models.

The later versions were much more "modern" in their
construction, using more of the Motrac design.  It was
at this time that Motorola added the 450 - 470 MHz
"CMT" model.  The 450 MHz models used a highband
transmitter with a varactor tripler as the final
stage.

When I owned the Motorola reconditioned equipment
center for the south-central United States (from 1970
until Motorola went out of this end of the business in
1979) I used one of the varactor diodes in a "home
brew" 432 MHz tripler.  With about 50 watts input at 2
meters, the output is right at 35 watts on 432 CW. 
This particular varactor was definitely being run at
way below its potential in the D34CMT models.

Glen, K9STH


--- CLIFF WALLACE <w6cdw@sbcglobal.net> wrote:

In fact the Dispatcher series of radios, common to
cabs and tow-trucks in the 60's, came in a number of configurations.

=====
Glen, K9STH

Web sites

http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco

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