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This mod for the Commtel 214 scanner will give
AM demodulation to bands: 137-144, 144-148 and 148-174
via a subminature SPDT switch.
(NOTE: All channels scanned or stored from
bands
137 - 174 MHz are heard using AM demodulation.
This modification does not change
UHF i.e. 406 - 956 MHz bands.)
Just follow the info using the pictures and that's it. I'm
sure people with the
diagrams & knowledge will work out how it's done.
A. Click the close
up below to see and see where to cut the track
& connection details to 1 & 3 of the switch.
Above: View inside the Commtel 214.
B. Now connect the central
position of
the switch to point 2. See the close up picture
below.
Above: Another look inside the back of Commtel 214.
Shows the location of the connector. (Behind the
blurred part!)
My diagram of the switch.
In my case a slide switch Such as this one.
I
will leave the mounting of the switch up to yourselves,
however I managed to conceal my switch under
the back cover
by making a slit in the plastic, just above the power pack,
but below the hole in middle .
(Note this scanner
is very similar to the Uniden Sportcat SC150)
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2003 Thingybobby