R.S. HTX-245 MOD


CAUTION MODIFICATION TO RADIO WILL VOID WARRANTY

this mod is for the new dual band HT from radioshack cat#19-1106

out of the box the radio will go from 144-148 rx/tx and 438-450 rx/tx

the mod will rx and tx from 136-174 and 420-470 


1. remove screws from back cover and battery compartment
2. remove nuts on volume and antenna jaack
3. unsolder speaker connections
4. carefully remove entire circuitry from shell
5. the smaller circuit board will un plug from main board
6. towards the middle top of the large circuit board their is a black 
    square processor chip. to the left corner their are 2 solder pad jumpers
    that are facing vertical in comparison with the board. to extend rx 
remove bridge 
    closest to right side. (the left jumper will only allow 144-146 and 
430-440 tx/rxonly)
7. to exend transmit unsolder the other pad that is horizontal in comparison 
to main  
    board.  (if MARS/CAP is wanted just remove the horizontal jumper and 
leave other   
     alone.140-149rx/tx)
8.reassemble radio
9. reset radio by pressing (MF) and (6) key while powering on.


----------------update---------------------------------------------------
Date: Tue, 15 Aug 2000 13:14:12 -0500
Subject: HTX-245
From: Gregory H Watson <deltabluesman@juno.com>

There has been quite a bit on confusion about the HTX-245 wide band mods.
 The current .txt file on the server is at best confusing.

 Hopefully, this will help answer some of the questions about performing
 the mods. to this radio.

 Start by removing the 6 screws which hold the case together.

 Remove the channel and volume knobs.

 Remove the nuts which hold the antenna and volume/channel controls.

 Unsolder the speaker leads.

 Carefully remove the chassis from the case.

 Remove the 2 gold colored screws which hold the smaller board to the main
 board.

 Unplug the smaller board from the main board and set it aside.

 Looking at the main board, there is a uP IC ( large black chip) at the
 top.

 Near the upper right-hand corner of this IC are 2 vertically oriented
 solder jumpers and one just to the right of them which is horizontal.

 To open wide band TX/RX, open the vertical jumper nearest the IC and the
 horizontal jumper.

 Reassemble the radio.

 Hold the function key (F) on the side of the radio, the '6' key and the
 'MR' key while powering the radio on.

 All memories will be cleared and the radio will be ready for wide band
 programming.  In addition, the 'BAND' function will no longer go to
 preprogrammed weather channels.


 Hope this helps.....  Greg, KA9DTZ