Radio/Tech modifications. Number 4

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But then I realized that when I still was in the Civil Air Patrol, there was a move underway to move to APCO P25 equipment and amateur radio equipment didn't comply with those standards. I was never involved with MARS, so I don't know if modified amateur radio equipment is still permitted there. Also, at least in my area, so many public safety agencies have moved to trunked modes, etc. If the radio isn't on the list, modifying it for "CAP" use is probably a waste of time. The story I like to relate about these mods is this: When I was first licensed, I was all about modding my radios for out of band transmit.

Then, an Amateur Radio handheld I owned was stolen. It had been modded and it had many of the local police and fire frequencies programmed into it they were still using conventional systems at that time. I became quite concerned to the point of feeling like a gun I owned might be used to kill someone. After that, I stopped modding my radios. I know that there are amateur radio dealers who will mod radios for their customers. While what they are doing is not illegal, I do question the ethics of this practice because they have to know how those radios are going to be used. SCPD Member. Joined Feb 24, Messages 65, Location Virginia.

I think that the Hams that do these conversions do it more out of a "because I can" reason, rather than with any intended use. After all- Who Knows??

Please read into that a lot of sarcasm on my part, but I bet this is the reason behind a majority of these conversions. On the other hand, I have used ham radios for years on US government frequencies, and in other countries; frequencies and equipment standards exempt from, or beyond the rules of the FCC. My favorite conversion was this goes back quite some years ago the famous, simple "cut the turquoise wire" in the ICOM 's HF transceivers- instant 1. We used these ICOM's thru out the Pacific on our government projects- and many were then donated to local island mayors for their inter-island communications Last edited: Sep 25, Joined Dec 22, Messages 3, I modded an ICOM dual bander.

It was pretty easy, just unsolder a diode. Partially because the receiver is tuned for , and partially because the antenna also is poor out of band. You are better off to get a proper commercial radio and load the HAM freqs in it. Token Member Premium Subscriber. Does this mean I intend to use them on frequencies for which I am not licensed?

Not exactly. With some of them, in order to use commercial parts without modifying the subsystems, I have had to use IFs that do not fall inside normal ham bands. Of course I could have modified the parts, but it was often simpler to modify the radio to work outside ham bands. Years ago it was not an issue, almost all ham radios could be operated outside ham bands without modification.

My KWM-2 came with, and still has, a complete crystal set to cover 3. It was up to the ham to know what frequencies he was authorized to operate on, and to make sure he was doing so, the equipment was not the nanny. Joined Aug 6, Messages Location Earth. I unlock all my radios as a matter of policy. It's not likely in this day and age, but in an emergency, one of those unlocked frequencies might be the one that saves somebody's life. THE newer radios you just don't have to modify anymore. You do have to memorized band edges though. Joined Jan 29, Messages 7, Location Illinois.

JASII said:. Joined Jul 8, Messages 10, Location Taxachusetts. Oh, oh, oh, little China toy Oh, oh, oh, little China toy I could escape this feeling, with my China toy I feel a wreck without my, little China toy I hear her heart beating, loud as thunder Saw they stars crashing I'm a mess without my, little China toy Wake up mornings where's my, little China toy I hear her heart's beating, loud as thunder gewecke said:.

FX1 Looper Combo For CB/Ham Radio Pro Audio Connections!

I have several that are expanded, but still don't compare to others which are designed and tuned for commercial use. Quality trumps modifications. TheSpaceMann said:. There was a tine in the s when Japanese cars were laughed at. Now they dominate American roads. Beware of China. Joined Feb 2, Messages Location Ohio. Remove screws from case and open radio. Reassemble radio, 5. Reset Micro Processor. Clip pin 2 on! Reassemble the radio. Reset the microprocessor. The Author, Publisher and alt other parties takes NO responsibility or liability for any damage or violation resulting from these modifications.

Remove 2 screws back of case and four screws from battery slide clip. Remove the top cover. Open radio. Locate and cut yellow wire behind the battery release button. Reset microprocessor. Press and hold [F] key and turn power on. Remove the four screws holding the battery slide plate in location. Careful not to break the battery plate wires 3.

Locate and cut the "PINK" wire. Only the PINK wire 4. Reassemble the unit. Locate and cut wire behind the battery release button. Remove green component per drawing. Reset the radio. Remove screws from back of case and. Remove all 4 screws from battery plate. Remove screw next to the BNC connector. Remove the top cover and the 4 screws holding the radio together. Locate and cut orange or Yellow wire directly below the PTT switch. Reset the CPU. The Author, Publisher and ail other parties takes NO responsibility or liability for any damage or violation resulting from these modifications.

Remove battery and antenna. Remove the four 4 screws on the bottom of the radio. Remove the battery slide plate. Reassemble the radig. Remove 5 screws from the back of the case. Slide and hold the Battery lock button open the radio carefully. Locate and cut the RED jumper wire. AM airband reception 5. Locate and cut the BLUE jumper. Expanded RF 6. Remove five screws from the back and carefully open the radio. Remove Power and Antenna. Remove screws from top case and open radio. Cut the yellow wire on the control board. Reassemble radio 5.

Turn radio on. Cut the yellow wire on the control board 4. Locate and cut the BLUE jumper wire. Reassemble the radio Reset the microprocessor. Cut the yellow wire looped around the blue condenser 4. Remove 2 screws from corners of tone board, to expose motherboard. Remove the front cover 7. Short chip resistor R35 and solder bridge the pads to the left of the resistor. Reassemble radio 9. The volume control controls the amount of repeater audio. Remove screws from case and open radio 3 screws in the top and 2 on each side. Locate and cut the indicated White resistor jumpers.

They are located on the vertical control PCB board. Remove the two pin connector to disable audio bleed in repeater mode. Remove the four screws, 2 on each side holding the LCD display to the main body of the radio. Locate and unscrew the 2 screws holding the LCD display together. Carefully separate the back cover of the display from the front cover. Use a flat blade screwdriver to apply slight pressure to the locking tabs in the top of the display.

Locate and cut the loop of BLUE wire. A audio frequency response kit is available from Alinco. Contact them for the parts and instruction sheet. Remove the Power cable and Antenna. Remove the 4 screws, two on each side. Remove the 2 screws holding the control head together. Carefully seperate the back and front cover of the control unit. Reassebie the control head. Remove the bottom cover, two additional screws on the bottom cover 9. For MHz RX, feed a new antenna cable thru the optional antenna jack on the back of the main body of the radio.

Locate antenna connector CN59 and attach the antenna cabie. Reset the Microprocessor. Carefully separate the back and front cover of the control unit. Reassemble the control head. Remove the bottom cover, two additional screws on the bottom cover For MHz RX, feed a new antenna cable through the optional antenna jack on the back of the main body of the radio.

Locate antenna connector CN59 and attach the antenna cable. Use of any modified radi may be a violation of FCC rules. Remove screws and open the case. Locate Microprocessor. Locate and cut Diode "B". Reset the microprocesor. Locate Chip Diode "3" near microprocessor see drawing 4. Remove Chip Diode M 3". Standard part HZR 6. Reassemble the radio 7. The Author. Publisher and all other parties takes NO responsibility or liability for any damage or violation resulting from these modifications.

Be careful. Do not break flat cables 3. Locate microprocessor, see Drawing 4. Install a DA chip diode in place. A 1N may be used 5. Reasseble the radio. Turn Power on. Press [ENT] 3. Press [0], [9]. Press [ENT] 5. Press and hold [F] then [0]. Press and hold [F] then [ENT], 7. Press and hold [F] then [0], 8. Press and hold [F] then [8]. Press [8]. Press and hold [F] then [2]. Remove screws and open case. Locate the microprocessor board 4.

QL1 3 may already be missing 5. QL13 may already be missing 6. Reset Microprocessor set mode 8. Remove two screws from the back case.

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artsci's Radio/Tech Modification Book

Remove the four screws from the battery retaining slide. Insert a 1N or DA chip diode in the pictured location. Install a DA1 13 chip diode in place. If required. Press and hold [F] then [ENT]. Press and hold [F] then [0], 9. Press PTT Briefly. Press [UHF] 7. Press [VHF] 1 4. Select Use Selector Knob M] Remove Battery and antenna. Locate and remove body screws and open the case. Locate and unsolder the copper plate from the back side of the LCD displat. Locate and remove chip diode D2. Attach a 1SS chip diode in the vacant D2 position. Reassebmle the radio. Reset the microprocessor, if required.

Locate DA1 13 chip Diode, see drawing 5. Remove the chip Diode. Reinstall the Diode upside down or with a 1N diode. Remove power and antenna. Remove four screws and open top cover. Locate microprocessor. Locate chip resistor, see drawing 5. Remove chip resistor usinf caution not to melt the front case plastic. Reset the microprocessor if required. Use of any modified radio may be a violation of F CO rules. Remove 0 ohm resistors near the microprocessor Specific data: RL "H" symbol The Author, Publisher and all other parties lakes NO responsibility or liability for any damage or violation resulting from these modifications.

Remove covers 3. Remove black tape patch under the VHF antenna connector. Remove cover from transmitter 5 screws 5. Remove screws securing the red and black power wires. Solder attach the new antenna coax as shown. Secure the coax using wire ties or other method. Replace the power cable screws. Replace the covers. Remove four screws and remove top cover. Locae vertical board on the front of the radio. Locate three BLUE chip resistors. Right side of connector labied "CTD" 5. Remove lower most chip resistor see drawing 6. Remove battery and Antenna.

Remove 2 lower screws from the battery plate. Locate Q12 Position, find point A and B 5. Solder a diode 1N or eq. R eassemb le the radi o. Locate Q Position, find point A and B 5. Remove power and Antenna. Remove the wire mounting stand. Remove the five screws that hold the bottom cover. Remove the bottom plate being careful to unplug the speaker as you remove it. Locate Chip Diode QD23 on front panel board. Cut leads to both bottom leads of QD Reassemble the radio see next step Reset the Radio, short the Reset pins with a wire or screw driver.

Use Selectror Knob Remoce screws and ope the case. Set VFO at Remove Power cable and all other cables. Remove 4 screws from the top cover. Remove the top cover and the right and left panels. Remove 4 screws from the power combiner unit and remove screen plate. A small screwdriver can be used to reach the switch. Remove Screws from the back of the radio.

See Drawing. Open radio and remove silver battery shield. Gently pry top and bottom circuit boards apart. Locate and remove solder from pad 4. Remember the battery clip and hand strap clips. Press [UP MHz] button 3 times. The display will show SQL Tl. Inject a signal or tune to a strong signal weather channel etc. Remove solder bridge from Pad 7 4. Remove the 4 screws holding the battery track. Remove the 2 screws in the back case. Carefully separate the front cover.

Locate and remove solder on Jumper pad Solder jump pads 1, 3, 7 and 8. Turn radio on and each channel indicator will blink. Repeater Offset control; 1. Make adjustments. ADJ Repeater Offset control: 1. Use of any modified radio may be a violation of FCC rules, The Author, Publisher and all other parties takes NO responsibility or liability for any damage or violation resulting from these modifications. Locate and remove solder on Jumper pads 4 and 7. Solder jump pads 1, 3, 5, 8, 9 and 10 old mod had pad 4 in place of 5 7.

Remove battery screws, belt clip screws and side strap screws. Remove black trim on sides of the radio. Remove the two side screws and slide the u-shaped back cover off. Remove the four tiny Phillips screws holding the front panel on. Fold panel to the right to open the radio. Untested out of band mod 2: Jumper pads 7,9,10, Locate alignment pots. Make adjustments 8. Reset the microprocessor If desired Remove five screws from the top cover and remove the cover. Remove five screws from the bottom cover and remove the cover.

Unplug the speaker. Remove the four screws holding the front pane!. Locate jumper pad number 7. Solder bridge pad number 7. Locate the reset pins Located on the front panel and clearly marked. Short the reset pins together for one second. New range - MHz 1. Unplug the DC power cable from the radio. Remove the top and bottom covers. Remove the speaker. Remove the knobs and nuts from the front panel. Remove the three screws from the control unit. Remove the Control unit from the front panel. Replace the control unit on the front panel. Reset the microprocessor, using a jumper short D09 on the control unit to ground on the radio.

Do not apply power. Replace knobs, screws etc. Apply DC power and turn radio on. Press [F] and then [RPT] button, use the control knob to enter 0. Press the [RPT] button. Unplug the power from the radio. Remove D and D Do not place in a jumper. Blue wire 5. Connect pin 1 of Q red wire to ground. Reassemble radio Note: Automatic repeater offset is lost. TX Range Open radio and located SW Unit. The SW unit is located on the front panel, behind the display. Remove or Install the components per table 1.

Remove the four screws holding the front panel. Remove solder bridge from Pad 2 4. Place solder Bridge on Pad 3 5. Reassemble Radio 6. Reset Microprocessor. If you have any doubts. Remove the four screws holding the battery track in place. Remove the two black screws holding the rear case in place. Carefully open the front cover from the radio. Pads 3 and 9 are already jumpered. Carefully replace the front cover and replace the two black screws.

Replace the battery track and the four screws. The radio display will cycle orderly through the memory channels. Enter the following band limits: 1 0. Pads 3 and 9 are already jumped. Enter the following band limits: Ch. Carefully unsolder the lithium battery and lift it to expose resistor position. Solder a Jumper or 0 ohm resistor or jumper in the empty R69 position. Solder the lithium battery back in place. Release buttons and turn radio off.

Stop here for normal operation 3. Press and hold [up] and [down] buttons and turn radio on. Program Enter into the keypad. Turn the radio off and turn back on. Press the [REV] button. The display should now be MHz 7. Rotate the dial knob until the "U" memory channel is displayed. Press the [Function] key to store the frequency in memory. Rotate the dial knob until the "L" memory channel is displayed. Turn radio off and on and select the "U" memory channel. Press the PTT button 3 times.

The display should read Press and hold the [Function] key until your hear two beeps. To receive a desired UHF frequency, you must use the following steps: 1. Select the "U" memory channel. Use the [arrow] keys or Dial Knob to select the desired frequency. Press [F] and [ALT] to stop scan mode. Locate and remove the 4 screws on the bottom battery track. Locate and remove the 4 black screws on the rear case. Carefully open the front cover and open the radio. Note location of white paper insulator and remove it.

Don't throw away 6. Locate jumpers location J13 and remove solder jumper. Replace the paper insulator making sure the ground tabs slide through insulator 8. Close radio being careful not to pinch any wires. Replace all screws.

Enjoy this project?

Replace battery and antenna. Turn the radio off. The ground jumper on the left side needs to be unsoldered. If desired Remove the three screws from the control unit, 6. Remove solder from pad 1 and Pad 2 on control unit. Solder jumper Pads 4 and Pads 3,4,5,7,11 and 14 will be bridged 9. Press [F] and then [RPT] button, use the control knob to enter 5, Use of any modified radio may be a violation of FCQ rules.

Open the radio and locate the MHz main unit. V Unplug the DC power cable from the radio 2. See Drawing 4. Reconnect the power cable and turn the radio on 5. Set the VFO dial to Turn power off and then back on again, 7. Locate the Black slide switch on the display panel, to the right of center and halfway down the backside. Use a screwdriver to set the switch to the left most position. Some models outside the USA may need the following modification - 1. Link pin 19 to pin 16 of IC MC with a 10 resistor. Be sure to use resistor leads are insulated to prevent shorts. Remove two screws at the front of the top cover and remove the top cover.

Use a screwdriver to set the switch to the GEN position.


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Serial Numbers above 9N can not be modified 1. Remove solder bridge from Pad 4 4. Reassemble the radio 6.

Locate and remove the solder from jumper pad 8. Pad 9 is already jumpered. Remove antenna from the radio. Rotate main control knob to show ON. Press [AM]. The display should show 7.

History of amateur radio

Remove the Jumper to ground on TP 1 1. Remove power from the radio. Remove covers. Reconnect the power cable. Rotate the main dial until the display shows ON 7. Press [PROC]. Turn the power off and remove the power cords. Remove the jumper placed in step 3 above. Remove the top cover of the transceiver. Locate the Control unit. It is the rightmost of the vertically-mounted circuits boards. Remove the two mounting screws on the boards restraining brackets. Remove the control unit. Locate Jumper pad JP It is located in the next to 1C Q Solder bridge Pad JP Reinstall the Control unit. Connect a 50 Ohm dummy load and a key to the key jack.

Dial Frequency 5. Set the RF Power switch fully clockwise.

K3 Enhancements and Mods and Tech Alerts

Close PTT and the key. Check frequency range 4. Dial Frequency 8. Check frequency range 8. Replace the top cover. NOTE: Avoid transmissions near Open the case top and bottom. Locate four crews attaching front panel and remove the top screws. Loosen the bottom screws. Tilt front panel forward. On the left side of the radio, remove the plug from the power supply to the front panel, gray and white wires 6.

Locate jumper position 3 on Control board. Unsolder the jumper in position 3 8. Remove power and antenna 2. Remove top and bottom covers, the speaker may fall out 3. Remove the Volume, Squelch and Main tuning knobs from the front of the radio. Remove the front panel push on all four tabs 5.