From: "Bernard Jari" 
Subject: Changing the TX and RX Frequency of the Radio Shack BTX-127 HT
Date: Mon, 18 Feb 2002 10:10:05 -0600

1) Remove the battery pack cover

2) Locate the DIP Switches above the battery pack

3) Locate DIP switches 3, 4, 5 and 6 (Right-hand side)

4) Set the 4 DIP switches according to the following chart for the
following frequencies: (Note: DIP switch number 3 will only be changed
for 151.940 MHz and won't be used for the other frequencies and DIP
switches 1 and 2, along with the rest, will be used for programming the
PL frequency of your choice, following the procedure in your owner's
manual, where once the PL frequency (1 PL frequency at any given time)
has been programmed, will be turned on and off by using DIP switch
number 1 only, Up or On for PL tone and Down or Off for no PL)

DIP Switch Settings
SW3     SW4     SW5     SW6    Freq
----------------------------------------------------------------
(Off)   Off     Off     Off    151.625 MHz (Red Dot)
(Off)   Off     On      Off    154.570 MHz (Blue Dot)
(Off)   Off     Off     On     151.955 MHz (Purple Dot)
(Off)   On      Off     Off    151.700 MHz
(Off)   On      On      Off    151.820 MHz
(Off)   On      Off     On     151.760 MHz
(Off)   Off     On      On     154.600 MHz (Green Dot)
(Off)   On      On      On     151.880 MHz
On      Off     Off     Off    151.940 MHz


5) Replace the battery pack cover
6) You are finished

Note: Your HT will be on the frequency that you need it to be on if
different than the factory setting.

Note: "On" is up or towards the antenna end of the HT and "Off" is down
or towards the base or battery end of the HT.

Note: If you see a round, dot-shaped, colored sticker on the outside of
the box, the color will clue you in as to what frequency the HT has
been factory-set to, unless they made a mistake at the factory...Ex: A
round Green "sticker" on the box means the HT has been pre-programmed
to the Green-Dot Frequency of 154.600 MHz.