Modification Notes for all 1st, 2nd, & 3rd Generation VX-5R's
Note: All 1,2 and 3rd Generations of the VX-5R ultimately modify the same way, but the original factory Solder Ball configurations are different. I've seen some mods posted that remove the 6th jumper also during the Freeband mod. What I do know is that with the 6th Jumper soldered, all repeater offsets in the 2M & 70Cm bands are correct for the USA bandplan. For the USA version, so far there is no way to open the cellular bands, or the cellular "images" in the 900Mhz range. The farther you get away from the amateur band, the lower the transmitted power will be. When you get to the extreme edges of the extended TX bands the radio might show its transmitting, but actually there is little or no power even though the display shown full scale on TX. The radio's VCO might not even lock at the band edges - this is normal.
Note: When using the ADMS-1(X) software, after you mod your VX-5R, you will must create a new template file in order for the ADMS software to recognize the mod and properly upload to the VX-5R. If you do not create a new template file, you will get an error trying to upload your freqs to the VX-5R. Simply create a new template file, and delete your old one.
Step 2: Figure out what Generation VX-5R you have
Mars/Cap or Freeband Modification For 1st & 2nd Generation VX-5R's
1) Remove Battery
2) Remove the Sticker/Cover for the Pressure Sensing Unit (SU-1)
3) Remove the SU-1 Pressure Sensing Unit Option Board (if installed)
4) Factory Configuration for USA VX-5R is X X X O O O X X (X = No Solder Ball O = Solder Ball)
5) For Mars/Cap, Remove The 4th Solder Ball - Your jumpers should look like this X X X X O O X X (X = No Solder Ball O = Solder Ball)
6) For Freeband, Remove The 4th & 5th Solder Balls - Your jumpers should look like this X X X X X O X X (X = No Solder Ball O = Solder Ball)
7) Reassemble Radio and Reset The Radio (Pwr-Mr-VFO-4) - You will loose all stored memory channels and custom settings and the radio is now modified
Specific information on all 8 solder jumpers can be found here.
Mars/Cap Modification Will Expanded Transmit Frequencies to:
50Mhz to 54Mhz
140Mhz to 174Mhz
420Mhz to 470Mhz
Freeband Modification Will Expanded Transmit Frequencies to:
48Mhz to 69.995Mhz
108Mhz to 221.995Mhz
300Mhz to 579.9875Mhz
Mars/Cap or Freeband Modification For 3rd Generation VX-5R's
1) Remove Battery
2) Remove the Sticker/Cover for the Pressure Sensing Unit (SU-1)
3) Remove the SU-1 Pressure Sensing Unit Option Board (if installed)
4) Factory Configuration for USA VX-5R usually looks like X X X O O X X X (X = No Solder Ball O = Solder Ball)
5) For Mars/Cap, Remove The 4th Solder Ball and Solder A Ball on the 6th Jumper (see note below) - Your jumpers should look like this X X X X O O X X
6) For Freeband, Remove The 4th & 5th Solder Balls and Solder A Ball on the 6th Jumper - Your jumpers should look like this X X X X X O X X
7) Reassemble Radio and Reset The Radio (Pwr-Mr-VFO-4) - You will loose all stored memory channels and custom settings and the radio is now modified
Specific information on all 8 solder jumpers can be found here.
Mars/Cap Modification Will Expanded Transmit Frequencies to:
50Mhz to 54Mhz
140Mhz to 174Mhz
420Mhz to 470Mhz
Freeband Modification Will Expanded Transmit Frequencies to:
48Mhz to 69.995Mhz
108Mhz to 221.995Mhz
300Mhz to 579.9875Mhz
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