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-
- IC-32 crossband mod
- ===================
-
- Here is a modification for the new Icom IC-32 handheld which will make it act
- as a cross band repeater!
-
- 1. First take off the battery pack.
- 2. Remove the 4 screws from radio's back.
- 3. Remove two screws above and below the PTT and take the whole thing off so
- the four microswitches are revealed.
- 4. Carefully take the radio apart by slightly pushing away the front cover.
- 5. Put the two pieces in front of you with the front part at your left and
- the back at your right. Be careful with the ribbon joining the two
- pieces! Orientation is as usual with the place that the battery plugs down
- and the top of radio (i.e. where the antenna goes) up.
- 6. Find some pads with diodes in the lower right of the left part (front) of
- the radio below to the speaker. Take a look in the drawing below:
-
- Top of the radio ^
-
- [[-|>--[[ The number of diodes installed in the top 3 pads
-
- [[-|>--[[ depends on the frequency coverage of the rig, maybe
-
- [[ [[ two or all three.
-
- _ZDDBD
- @DDAD This is a small diode, by removing it the unit will
- receive from 300-370 Mhz but this is an untested mod!
-
- [[-|>--[[ When you cut this one crossband repeater is enabled!
- \
- [[ \ [[ If you put this diode crossed and have full frequency
- coverage not only is cross band repeating enabled but
- Bottom of the radio you can insert the frequency from the keypad starting
- where battery plugs from second digit (without this mod when you wish to
- insert a frequency in another decade from the one
- you already are, you have to go there manually).
-
- Last but not least to enable cross band repeating first choose a pair of
- frequencies with the two VFOs for VHF and UHF. Then press and hold the
- function key while pressing with the other hand the following "C" "6" "D".
- The radio will start scanning the two frequencies continuously, if a station
- is heard in one of the two it will retransmitted from the other! The two
- frequencies must be simplex, no cross band repeaters yet sorry!
-
- Manos SV1IW @ SV1IW
-
-
- IC32E extended frequency range mods
- ===================================
-
- The new Icom IC32E is delivered with several frequency ranges. For the
- European market, it covers 144 to 146MHz and 430 to 440MHz, although the
- possible bandwidth is much wider. Your radio will be able to receive from 138
- to 174MHz and 420 to 450Mhz and transmit on roughly the same ranges after the
- work is done.
- The modifications necessary are very simple and do not require any special
- electronic parts. All you need is a small soldering iron with solder,
- diagonal cutters, a small screwdriver, adhesive tape, shrink sleeving if
- available, 2 diodes 1N4148 or equivalent and 12cm of insulated, thin wire.
-
- Before starting with the modifications, remember that you might lose
- warranty. I also cannot guarantee your work will be successful!
-
- Here is how to carry out the modifications:
-
- 1.) Turn the radio off and remove the battery pack.
- 2.) Remove the 4 screws on the back of the transceiver. Be sure to use the
- right screwdriver.
- 3.) Hold the radio in your left hand and try to lift the front panel near the
- battery pack holder with your right hand. Move it a little bit left and
- right, back and forth to make it come loose.
- Open it up to about 1cm on the bottom of the radio, then pull the front
- panel towards you with little force. Be careful not to break any leads
- inside. There is also a rubber gasket around the inner side of the case,
- that prevents water penetration. Be sure not to rip it.
- 4.) Detach the speaker/mic connector, open the case completely and put the
- radio in front of you, with the battery connector pointing to the left.
- 5.) Below the speaker in the left lower corner you find 3 diodes, soldered to
- small pads. One sits alone, 2 are adjacent to a multi lead connector.
- These two diodes must be unsoldered at their cathodes (the leads that
- point towards the speaker and marked with a ring). Cut a small piece of
- adhesive tape and slide it under the diodes so that it covers the free
- copper pads and prevents the unsoldered diode leads from touching them.
- This completes the receiver modifications. If you are not interested in
- modifying your tramsmitter too, please proceed with 15.
- 6.) Now you need a steady hand! Cut two pieces of wire to a length of about
- 2cm and remove 2mm of insulation from both ends. Cut two pieces of wire
- to a length of 4cm and do the same.
- 7.) Take one of the 1N4148 diodes and cut both leads to a length of 2mm. Hold
- it with tweezers and carefully put some solder on both leads.
- 8.) Take one of the 2cm wires, put some solder on the ends and solder it to
- the cathode (marked with ring) of the diode. Keep soldering time as
- short as possible.
- 9.) Take one of the 4cm wires and solder it to the anode of the diode the
- same way.
- 10.) Do the same with the second diode.
- 11.) Use adhesive tape or shrink sleeving to insulate diodes.
- 12.) Twist together the free ends of the 4cm leads and solder them to the
- anode (lower) patch of the diode that is the nearest one to the multi
- lead connector.
- 13.) About 4cm up and right from this diode there are 2 SMD-diodes with 3
- pins. They can be found easily, because they are big, compared to the
- other parts around. They look like little, black boxes with two
- connectors on the left, one on the right side.
- 14.) Carefully solder the free ends of your diode cables to the RIGHT pins of
- the SMD-chips, one wire for each pin. Which wire you solder to which
- diode is of no importance. It is a good idea to switch off the soldering
- iron during this action to prevent heat destruction of the SMD's.
-
- This completes the transmitter modifications.
-
- 15.) Carefully examine the radio for wire clippings, solder splashes or
- foreign objects.
- 16.) Attach the speaker/mic connector again, have a look on the rubber gasket
- whether it is still in its bed and then slide the front panel under the
- top cover.
- 17.) Close the case completely, put the screws in and tighten them again.
-
- DON'T PANIC!
- Your radio will be reset and all stored memories lost when you switch it on.
- This is NO malfunction.
-
- Because the second digit of the frequency (e.g. 1<5>3.205) cannot be entered
- through the keypad, you have to use the dial-select function in conjunction
- with the main dial knob to change the 10MHz digit of the scanner.
- If a 'U' appears in the display instead of the chosen memory channel, the PLL
- will be unlocked and the radio is unable to receive or transmit. This might
- happen when you are close to the band ends.
-
- 73 DF2UZ @ DB0GV
-
-