Modifications A to D - The World of Free Packet Software Amsterdam
       THE NL3ASD MODIFICATION FILES - THE HAM RADIO MODIFICATION - PAGES PAGES E TO HHOMEPAGE

Subject: How to Modify a AT-600/HTX 204 !



Keyboard



With the radio on.

1. Press "F" and "0" to enter main menu. Press "14623" consecutively until you here the confirmation beep.

     Turn off the receiver and turn it back on. Now the receive modification is done.

2. Press "F" and "0" to enter main menu. Press "1462311289"consecutively until you here the confirmation

beep

     Turn off the receiver and turn it back on. Now the transmit modification is done.



Hardware (CAUTION:It voids the warranty.)



1. Open the radio and remove Q220 from the keyboard.

     Turn on the radio by pressing "F", "LAMP" and "5".

2. Open the radio and remove Q220 and Q221 from the keyboard.

     Turn on the radio by pressing "F", "LAMP" and "5".



If you have version 1.00 + 1.10 (Radio Shack's HTX-204 included):



Keyboard 1:RX 100-200, 330-500, 830-868, and 896-999.995 MHz; TX same

Keyboard 2:TX 100-200, 400-500 MHz; RX same



Hardware 1:RX 100-199.995, 330-499.995, 830-868, 896-999.995 MHz, TX same

Hardware 2:TX 100-199.995, 400-499.995 MHz; RX same



If you have version 1.20:



Keyboard 1:RX 100-200, 330-500, and 896-1000 MHz; TX same

Keyboard 2:TX 142.5-149.5 MHz; RX same



Hardware 1:TX 138-174, 430-470 MHz; RX 130-174, 350-470, 869-999.995 MHz.

Hardware 2:TX 100-200, 400-500; RX 100-199.995, 330-499.995, 896-999.995 MHz.



If you have version 1.30:



Not available at present.



                        Cellular Bands Information for ADI-600



Mobile Cellular (823.9275 - 851.0000 MHz)

     - Unable to receive

Portable Cellular(868.9375 - 896.1125 MHz)

     - 913.0375 - 940.2125 MHz (FM Mode)

          - Set frequency step to 30 kHz after you find one frequency that is used for the cellular in your area. This will work perfect.

SOURCE: The QRZ Windows Ham Radio CDROM



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