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Kenwood TH- 25AT mods
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TH25AT.11
On the TH-45AT:
(All frequencies are given in MHz.)
R18 in
R28 in
This is how the radio is delivered in the USA. The radio covers
438-450 MHz.
R18 in
R20 out
The radio is prohibited from tuning outside 440-450 MHz.
R18 out
R28 in
The radio will only tune from 215-230 MHz. Note that the PLL would not
lock up! (What did you expect?) Could it be possible that Kenwood
originally planned a 220 version of this radio, but then scrapped their
plans?
R18 out
R28 out
The radio will tune from 200-500 MHz (on the display only - your PLL
will not lock up over this entire range). Transmitting is possible
anywhere your PLL will lock up.
I have found a quick and easy way to retune your PLL (in the TH45-AT)
with a minimum of test equipment. All you need is a scope and a small
tuning tool. First, take off the battery pack holder plate. Then,
remove the silvery sticker covering the tuning pot access holes.
CONTINUED IN FILE TH25AT.7
Downloaded From P-80 International Information Systems 304-744-2253
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