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Icom IC-02N Manual

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User reviews and opinions

Comments to date: 9. Page 1 of 1. Average Rating:
rsahgal 7:31am on Wednesday, November 3rd, 2010 
Small price for big sound For $16.00, what can you say! I was quite pleased with the sound for such a small price. For this great price, not bad So I ordered these on Monday, early morning and after the item was finally shipped.
bhanscom 3:09am on Wednesday, October 27th, 2010 
The only issue that I have found is that the rubber ear buds can compress at times - I simply pull them back out, but it can be anoying at times.
paenson 6:10am on Tuesday, October 5th, 2010 
My first IEM were "Koss Spark Plug" ( 2 pairs ) and I thought they were good, but after trying EP-630 I forgot "Plugs" like a horrible nightmare. These came with my Dell XPS 1530 and I tried them for the first time and really was impressed.
TaQ 11:13am on Thursday, September 9th, 2010 
Hello Bargain Hunters! lightweight, great sound, wide range, comfy none Placement of the headset in the ear of the Creative EP630 with coverage from rubber provide a fantastic experience audio in MP3 format.
Fangly 11:08am on Friday, August 20th, 2010 
I must be a compulsive headphone buyer. I have a lot of headphones at home, most inexpensive and not all are being used.
intellectualproperty 6:36pm on Friday, May 28th, 2010 
Creative EP-830 Noise Isolating Earphones Very disappointed with these earphones, i bought them off the back of very good reviews i had read.
Charllie 12:56am on Sunday, May 2nd, 2010 
It was fast fun and easy. Stuck the cassette in plug in my MP3 player and listen to good quality music with no static. Easy Setup","Good Quality".
minboy 7:34pm on Tuesday, April 6th, 2010 
The silicone fittings are changeable so you can choose the right size for your ears. Bad thing about that is that they tend to fall off now and then. Not only do I like bacon, but I love the way it smells when it is cooking Inexpensive, but sound great The wire is a little thin. Not a big deal.
Guy Wathieu 9:59pm on Monday, April 5th, 2010 
Amazing Creative EP-630 In-Ear Noise-Isolating Headphones (Black) I got a pair of these when I ordered my XPS computer system back in 2008.

Comments posted on are solely the views and opinions of the people posting them and do not necessarily reflect the views or opinions of us.




This modification is read 873 times.
(IC-22) Icom IC22S Packet Modification
The Icom IC22S is a ten watt diode matrix PLL synthesized 2 meter rig manufactured in the early 1970's. In it's stock condition it tunes 146-148 MHz in 15 KHz steps. Since I am sure there are a few of these sitting on shelves collecting dust due to the limited tuning range, why not modify them for the perfect packet rig. First replace the 7.68 MHz Oscillator/Divider crystal (X1) with a 5.12 MHz crystal. This will move the band to 145.00- 146.94 MHz in 10 KHz increments. The repeater offset will now be 400 KHz which should not pose a problem in simplex packet operation. I will give the diode matrix settings for the most commonly used packet frequencies. You can formulate others as needed using the formula N=100*(f-145)+61 and the manual. The diode positions indicated ARE WHERE DIODES ARE PRESENT. The other positions are left empty. 145.01= 145.03= 145.05= 145.07= 145.09= D5,D4,D3,D2,D1 D6 D6,D1 D6,D2 D6,D2,D1 top of page
This modification is read 719 times.
(IC-22) IC-22S mods for 5 KHz step
I have prepared information to modify the IC22S sythesizer to allow it to have 5 KHZ steps in lieu of the original 15 KHZ steps. This will allow the rig to go onto 145.01 MHZ for packet radio operation. In short, the modification requires changing a crystal, making some copper path cuts, adding some jumpers, and installing a new divide by N counter which consists of three CMOS digital integrated circuits. If you put it on a frequency as low as 145.01 you will also need to re-tune the front end and you may need to re-tune the VCO free running frequency. I have made the mod to my radio and am using it to up-load this file. I re-tuned the front end to increase sensitivity back to the normal although it did work without re-tuning. I did not have to adjust the VCO. If you would like to receive the information which consists of a schematic of new counter, old and new block diagrams and instructions to incorporate and test the modifications, send an SASE (standard business envelope, 22 cents postage) to: Jon Reeves, WB9CNE 12125 Trolley Rd. Oaklandon, In 46236-3056 NOTE: The information which will be mailed is being prepared for publication. It is requested that the information be used only for modification of your personal radio and not be passed on without this note or placed on any bulletin board system. I am releasing the information now to assist packet radio operators in their efforts to move to 145.01 MHz and would appreciate consideration of this request.

cut. I'm guessing, but it could be that the rest of the diode changes are for the 10 MHz & 100 MHz digit entry (which I'd like but could live without) or out-of-band TX, or the like. If anyone has tried only cutting D13 and resetting? Did it work? What is your serial number? Please post to the net! Mike Pflueger Packet: WD8KPZ @ W1FJI Transmit range doesn't appear to be affected unfortunately. I was at least hoping for 420-450 coverage. BTW, I tried each amateur band from 6m to 23cm. The PLL doesn't lock up at either end. Another negative is the frequency step on 220 doesn't allow one to hit each possible repeater slot. 73 de Gene WA1UXA
This modification is read 871 times.
(IC-24) IC-24AT Keyboard command summary
This is an attempt to document all of the known key sequences for the ICO IC24AT (144/440MHz dual band hand held). Some key sequences may be common with the IC[2,3,4]SAT, therefore a fewkey seqences fr thoseradios re also on this list. Some ke sequenes requre optins (such as the PL encode/decode board). This is not designed to replace the owners manual, but to summarize the information in one place. Note: Many controls vary depending on the current mode, i.e.: Scan up/down will search frequencies when in VFO mode, and will scan meory channels when in Memory mode. Consult the owners guide for complete iformation.
KEY/COMBINATION = Result, action ---------------- ------------------------------------------------------------0-9,A,B,C,D,#,* 0-9 A B C D * # MONI H/L/DTMF FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC FUNC + + + + + + + + + + + + + + + + + A B C D * # 5 + D = = = = = = = = = = = = = = = = = = = = = = = = = = = note: when transmitting these will generate DTMF tones Enter frequency (can also use the VFO knob) VFO mode / clear incomplete entry Memory mode VHF / UHF change Call channel Step frequency down/scan down Step frequency up/scan up Open squelch and change to input frequency (if not simplex) while button is depressed Select High/Low power, or (while transmitting) send preprogrammed DTMF codes Dial set PL enable (when option is installed) Code squelch [NOT for the IC24AT, IC[2,3,4]SAT option only] Skip memory Duplexoperatin Code [NOT for the IC24AT, IC[2,3,4]SAT option only] Mask freuency Priority mode on/off (operation dependent on current mode) Set mode (several different functions, press A to exit) Real time clock and timer functions (press PTT to exit) Memory to VFO transfer Memory Write Split operation (cross band full duplex) Lock mode / Cross Band Repeat disable Scan programmed limits (down) Scan programmed limits (up) Cross Band Repeat enable (split mode must be on!) Diode D14 (right diode on CPU board) must be removed to enable the use of this function) RX/TX light enable / disable Select DTMF Autodialer memory Change frequency/memory channel (according to dial set, see FUNC+0) Lock light on (don't time out)
FUNC + MONI = FUNC + H/L/DTMF = Func + VFO knob = Func + LIGHT =

(IC-2800) Enable crossband function for IC-2800
Author: -
Unsolder or cut D 60 (near W 13) Press "Main UHF,Main VHF,Chg/L" For 2 seconds, crossband will be enabled.
This modification is read 649 times.
(IC-281) Crossband repeat
To enable crossband repeat press and hold the BAND key and the SET key for about a second, a flashing L will appear in the lower right. To turn off hold the SET key. Unfortunately code squelch does not seem to work when crossband repeat is enabled. Don't know about tone squelch.
This modification is read 877 times.
(IC-281) Extended Receive for IC-281
To enable extended receive a jumper has to be removed. To enable extended transmit a diode has to be removed. I have only tested the extended receive which gives you from 118-174.995 and 320-479.995. Open the case by removing all the screws on the top, bottom and left/right sides and separating the top and bottom covers from the chassis. Next remove the plastic front panel that covers the logic circuit board by removing the two top and two bottom screws that attach it to the chassis. Next remove the front panel logic board by taking out the four front screws that attach it to the chassis. Position the logic board so that the side normally near the chassis is on top and a round flat battery attached via leads is visible with the connector near the bottom and the cut out at the bottom right. Below the battery on the lower right there are a number of diodes, most likely surfaced mounted. Look just to the left of the diodes, there will be a very small surface mount jumper at the bottom (-#WW#- on diagram below). There is no silk screen on the board to identify it (on mine at least) but the part itself may have a zero printed on it for zero ohms. Removing this jumper will give you extended receive capability. Diagram (very bad but hopefully you get the idea)
R O U N D B A T T E R Y ! ! ! # D # ! # D # ! # D # ! # D #


-#D#-#D#- -#D# ! -#D#- -#D#! ! ! ! -#D#- -***-
This modification is read 932 times.

This modification is read 665 times.
(IC-3200) IC-3200A TX to RX delay fix
For those poor souls who are trying to use the ic-3200a on packet here is here is some relief. The problem is that when going from transmit to receive there is a delay in the receive audio turn on, which is on the order of 500 milliseconds and may be too long for some packet situations unless everyone had their txdelay set to 750 milliseconds. There are two ways to resolve the problem. both are fairley simple. the easiest way is to remove the muting on the audio P.A. I.C. The instructions follow: 1. Remove the cover that has the speaker attached to it (being careful of the wires) 2. WIth the front of the radio facing you, look for the audio P.A. I.C. In the right rear part of the radio next to the chassis it is marked "UPC2002", looks like a TO-220 case transistor, and has five leads on it 3. Immediately to the left of the "UPC2002" is a diode standing on end, and marked "D19" on the circuit board this is the diode that mutes the audio P.A. I.C. during transmit 4. Cut one leg of "D19" and the audio P.A. I.C. will no longer be muted during transmit and the receiver will respond almost immediately. This is all that is req'd and my tests have shown that the IC-3200A will work with other tnc's with txdelay's set as short as 150 msecs where before this modification a txdelay of about 600 msecs was required of the station trying to communicate to the IC3200A. For those interested in an alternate method here is what has been done by WB4FOW on several other radios: Since about 1985 most icom radios have pin 8 of the microphone connector wired to the speaker. This is convenient for the wiring of a tnc and is usually easy to modify so that receive audio is taken from the high side of the volume control. To get back to the subject of the alternate modification for the IC-3200A, you can rewire pin 8 of the microphone connector to the high side of the volume control and avoid the muting circuit but if you plan to leave the tnc wired permenantly to the radio and also,to use the radio on voice you will need to change a resistor in the tnc so as not to load down the audio at the volume control. the value of this resistor will have to be determined experimentaly. If anyone requires more information or assistance with this matter feel free to call clark, wb4fow, at 305-594-4313 monday through friday 10am to 6pm or leave a message in the w4nvu or aa4tm bbs's.
This modification is read 684 times.
(IC-3200) IC-3200A ext frq 430-440 MHz

This information and photos was supplied by David Spicer,VK7ZDJ.
This modification is read 5856 times.
(IC-706mkii) mods IC706 MKIIG por EA1DOU (ver. Espaola)
This modification is read 4753 times.


(IC-706MKII) Modifikation IC-706MKIIG fr 9k6 PR und Pactor
Author: Andr Loos DO1CAL -
Es folgen 4 Bilder im *.gif - Format die den Umbau fr 9k6 PR und Pactor beschreiben fr den IC-706MKIIG. Viel Spa damit. Ich bernehme keine Haftung fr evtl. entstehende Schden am Transceiver ! Die 4 Dateien habe ich im PR-Netz gefunden.
This modification is read 2893 times.


(IC-706MKII) IC-706MKIIG mod
Author: Tobias, DL1TWA -
Okay, I've got a new Icom IC-706MKIIG info for you: There is a mod saying: "Push P.AMP/ATT and RIT/SUB while power up and you will be able to see SHIFT-ADJ on your 706mkII. Dont know what this is for, recalibrating ?" I have tested this and figured out the following: When the SHIFT knob is in the middle position and you press SHIFT-ADJ, then "Good" is displayed. Nothing happens after power on. But when you turn the SHIFT knob a little to the left or to the right, then good is displayed and next time you power up you have a modified shift adjustment. The SHIFT graph is different, too! If you turn the knob a bit more to the left or to the right, then "Error" is displayed and nothing happens. I wrote to Icom Europe and they say, that this function (P.AMP/ATT + RIT/SUB) is only used in the factory during the production process of the IC-706MKIIG. to calibrate the centersetting of the shift know. Afterwards a new calibration shouldn't be necessary. When you press the arrow in the SHIFT-ADJ menu for one second, the position of the shift know is stored as the new center setting.
This modification is read 1865 times.


(IC-707) Receive and Transmit Expansion for ICOM IC-707
1. Remove power and antenna 2. Remove screws and open case 3. Locate front unit board (The one behind the dial) 4. In Version 1: Locate and remove Diode D12

D12 D11

[] D13
This modification is read 704 times.


(IC-718) IC-718 TX 1.8 - 30 MHz
Remove D-54 on the logic board, located behind the front panel. D-54 is located in the upper left corner in the lower vertical group of diodes.


0-D54 X
This modification is read 2320 times.


(IC-718) Modify IC-718#04 to IC-718#03
Author: Jan SP2EXE - How to change freqency coverage from version IC-718#04 to IC-718#03? It is easy to restrict the freqency range (to modify from #04 to #03) Remove D50 diode in the Logic board is enough. D50 is located close to D54. 73 de Jan SP2EXE
This modification is read 1868 times.
(IC-720) ICOM IC-720 extended xmit
Transmitter is unlocked by snipping the light blue wire that's at the very end of the top hatch cover to the left middle side of the transceiver.
This modification is read 1186 times.
(IC-720) Modifying IC-720A to get rid of rotary relay
I have just finished modifying an old IC-720A HF transceiver to replace the rotary relay filter control with a set of reed relays and a small digital circuit to select the appropriate relay and provide feedback to the existing CPU in the radio so it thinks it's still on the rotary relay. The cost for parts was about $25; the cost of my time was slightly more than that, but it was "fun". The modification is so far successful, and the radio is much quieter in band switching as well as being more reliable (the old rotary relay was impossible to get mechanically aligned correctly, leading to poor connectivity between the rx/tx and the antenna, as well as many missed stepping pulses). Summary: Use the step-pulse line to drive a small SPDT relay; use the SPDT relay to drive an R/S flip-flop (built from two nand gates) to provide a clean step signal (the existing step signal has some kind of very high speed clock train superimposed on it and therefore was not usable directly). Feed the pulse train into a CMOS decade counter type 4017. Take the appropriate decade outputs (active high) and recreate the switch-position feedback signals using a small diode matrix ala the original design. Also use the decade outputs through 33K resistors to turn on 2N3904 NPN transistors, which are used to select the appropriate (1 of 7) DPST reed relays. The CMOS chips (the nand gates and the decade counter) can be had at Radio Shack and must be powered from 9V (or so) because the radio does not use 5V logic (of course.) I mounted the reed relays inside the original low-pass filter subassembly, and the rest of the circuitry on a small perf-board near the SWR module (connected by ribbon cable). This is not a detailed design description but if you are interested I will provide more details. This project did ssalvage an otherwise-worthless IC-720A, but I don't think I'd do it again (rather time consuming, but perhaps you can benefit from my experience and save some time).

(IC-729) Modification Icom IC-729: General coverage TX
Open up the radio and locate the pll board, cut diode D5. The board should be located on the left hand side at the rear. Reset the cpu by pressing function and the mw button together while turning the radio off and on again. That will give you tx coverage from 1.6 to 30MHz!
This modification is read 661 times.


(IC-730) Preventative Maintenance for the ICOM IC-730
Though the IC-730 is a good-performing, reliable radio, many of these units have been in service for a number years and are beginning to show their age. The following preventative maintenance procedures should be done to all IC-730's that come in for repair. You will find that when you take a few minutes to attend these minor details while the radio is on your bench, your returnrepair rate for the IC-730 will be almost nil. 1. On the RF unit, resolder the connectors at J2 and J3 on the RF unit. Due to the relatively thick coax cables on the connectors, these joints tend to crack with age and cause intermittent transmit and receive problems. 2. Make sure the receiver preamp works. If inoperative, replace relay RL1 on the RF unit. Install the factory update to prevent relay failure 3. Check transistor Q5 on the RF unit. If it is a 2SC945Q, replace it with the improved 2SC2878B to prevent spurious output from the transmitter and failure of the driver transistors. If Q5 is a type 1636, it doesn't need to be replaced. 4. Clean the RIT pot and switch with tuner cleaner. These controls are usually noisy and erratic, making the RIT hard to use. 5. Tighten the chrome-plated PC board mounting screws. The type of screw and spacer used in the IC-730 tends to come loose if the radio is used in a high-vibration, mobile environment. Don't forget to tighten the screws on the logic and IF units located beneath the main unit. 6. Check the bandwidth coupler for proper tightness. Tighten as needed.
This modification is read 926 times.
(IC-735) Xmit Mods for IC-735
I don't have either one of my 735's open and I can't seem to find the precise location or information but roughly. There are two diodes, D30 &D31 (or maybe it's D32&D33 D34&D35 I can't remember) located toward the front center of the board containing the CPU. The diodes were end mounted with yellow insulation over the end of the leads away from the board. Cutting these diodes out of the circuit enables broadband transmit. My radios were purchased new in spring of 1989 so I don't know if they acurately reflect current production units. This is a particularly nice feature since it allows wide coverage when used with transverters. I use my 735's with my 144MHZ 10.368 GHz transverters with the radios operating in the 20-30 MHz region. It allows 10 MHz of all-mode coverage on every vhfuhf-uwave amateur band. 73 Glenn Elmore n6gn From: Glenn Elmore Date: Mon, 4 Feb 91 9:28:24 PST

70% AM. My personal findings are that this do MW listening much more interesting and enjoyable and I have no problems with to strong signal distortion what so ever. SM4RNA Anders
This modification is read 1124 times.
(IC-781) IC-781 General coverage transmit mod
1. 2. 3. 4. 5. Remove power and ant. Remove screws open case. Locate and cut resistor r80 on logic b board. Reset cpu. Reassemble radio.
This modification is read 1007 times.


(IC-781) 781 ALC Circuit problem
Icom 781 Date 13/05/97 The ALC circuit in the 781 is too slow to respond. This results in the following phenomenon: If you set the power level to 30W, for example, there is a leading pulse that can be more than 200W, particularly if the drive control is advanced. This results in a serious problem if you are using an amplifier. It makes it very difficult to limit drive to an amplifier properly. This behavior is clearly seen on a scope and to some extent on a good peak-reading meter. However I suspect many hams are unaware of the problem as it does not show up on RMS meters due to the short duration of the spike. I have used three 781's over the years ( ser# 19??, 21?? and now 2589) and they all exhibit the same behavior. This behavior is not exhibited by other Icom radios I have checked such as the IC751A, IC735 or IC765. When I had my previous 781, the tubes in my amplifier, a Ten-Tec Titan using a pair of 3CX800A7's, developed shorted grids, even though they were only a few years old and lightly used. I suspected the 781 caused the failure, but sold it before the amplifier was repaired. I recently bought another used 781 from Burghardt radio, serial # 2589, and within 3 weeks of obtaining the 781, my tubes (less than 2 years old) are shorted again. I do not believe this is a coincidence! I run the amp conservatively, and I doubt the tubes have 50 hours transmit time on them. I believe the problem is vaporization of the gold plating from the grid of the 3CX800 causing the tubes to become gassy, which causes arcing. I spoke to Technical Support at Icom USA and was informed that the 781's just work that way and nothing can be done. That is a ridiculous answer! Of course it can be fixed, the attack time in the ALC circuit has to be shortened. This turned out to be easy to accomplish. Locate the following components connected to the base of Q34 in the ALC amp, R107, R108, C47 & C48. These determine the attack and decay time of the ALC amp. Values as per Service manual:

There seemed to be no way of changing the mic button step size to smaller than 100 Hz. An oversight? RS-232 Control Icom's system is called CI-V (Communication Interface 5), and is accessed by a rear panel jack with a bi-directional service. The voltage is TTL ish. You're supposed to buy the CI-V interface which converts to RS232 levels, and also, I assume, de-multiplexes the input and output. The manual only provides a limited description of the control codes required; I guess a full treatise comes with the interface. In particular I couldn't determine what frequency resolution is available via RS-232 control. Other Observations 1. There is a miniature 40mm fan inside the PA section which comes on when the radio is too hot, and the TX is keyed. I spotted the fan on the schematic, but I couldn't find it inside the radio until I provoked it into action during a megabyte file transfer at full power and a 75% duty cycle. The noise is less than a typical computer's. 2. If you want to use speech you must switch your TNC off or disconnect it from the accessory socket, otherwise your speech will be obliterated by data. This is not mentioned in the manual! 3. There is no VOX system. Witticisms The manual is beautifully laid out, with explanations crystal clear, quite devoid of Janglish. Fortunately two useful tips escaped the proof-readers: IF Shift Control, page 24: "Especially in CW mode, a mechanical noise may sound when rotating the [SHIFT] control, however, it is not a transceiver malfunction." I'm still decoding that one. Satellite Notes 1., page 35: "NEVER set the output power too high. Too much power will shorten the satellite's life." Ah so. Conclusion The IC-820H wasn't really designed with satellite operation is its primary application. It's unlikely to win the hearts of serious satellite users, in the same way as Yaesu's FT736R, mainly because of its lack of flexibility. But an average user who wants to try out transponding satellites such as Oscar-13 will find it a satisfactory starting point. With the Pacsats, 1200 bps doppler tracking is awkward, and 9600 bps full duplex operation requires you to modify the radio. The IC-820H is a nice radio if your needs are normal VHF/UHF operating, although serious VHF/UHF users will bemoan the lack of control over external equipment. It is also fine for low speed data transmission, and is the first general purpose radio that provides 9600 bps packet radio simplex capability straight out of the box, at which it excels. Acknowledgement My sincere thanks to Dennis Goodwin at Icom-UK for the IC-820H loan. (C)1994 James Miller G3RUH
(IC-820) 1750Hz on IC-820, modif
Here a description how to activate the 1750Hz tone call with a US IC-820 I've made those modifications with a IC-820 #13 (written on the cover) 1. remove the top and the back cover of the 820. 2. remove the 2 screws on the left and on the right on the front panel Now you see the printed circuit board which is on the other side of the front side of the 820. 3. locate the 8 diodes located near the U-shape hole on the circuit. starting from the hole they are :

remove the battery pack. remove 4 screws that hold the sliding guide that the battery pack mounts on. This is the piece of metal that frames the PL tone switches. remove the sliding guide. Be careful that you don't lose the battery release button. there's a screw on the left side of the HT just below the light switch. Remove it. CAREFULLY pry the front panel up. There's speaker wires AND a flexable lead that goes to the front panel.
There's a shielded PCB that these leads run to. Carefully pry this up. It will then fold down. There's several flexable leads at the bottom. You should see the CPU now. With the manual, locate where D113, D119, Q131 are. Where the new|diode goes is not marked in the diagram of the CPU PCB. Locate the anodes of D119. This land connects to pin 27 of the CPU chip ic101. Locate the cathode of D113. This land connects to pin 20 of the CPU chip. These diodes are SMDs, and do not look like what you'd expect diodes to look like. In the area between Q131, D119, D113, and the CPU chip, you should see a set of 3 solder pads that form a trianglular pattern that would accept a 3 legged SMD, like the neighboring diodes and transistors. one of these pads connects to the anodes of D119. The new diode's anode goes to this pad. Another pad connects to the cathode of D113. The cathode of the new diode goes here. This means that the new diode athode will connect to pin 20 of the CPU, and that the anode will connect to pin 27 of the CPU. Carefully prepare the diode leads to line up with the proper pads, and take care that when you solder it on, you don't short to something. Also, take anti-static precautions. I used a bit of double-sticky-foam tape to hold the diode in place when I soldered it. And I left the tape to help keep it in place after I was done. Be sure that you will be able to replace the PCB you pried up, without it touching the diode. Reassemble the rig. Do a CPU reset. That is: Turn the power on while holding the light switch down. You should be able to xmit between 139 to about 160 Mhz. You could tweak the PLL to extend it further, but I didn't do this. The xmit power will be lower on the higher freqs.

Frequency range is 50,0-107,995 MHz FM 108,0-135,995 MHz AM (aviation band) 136,0-299,900 MHz FM for the VHF portion; 300,0-999,900 MHz FM for the UHF portion.
This modification is read 948 times.
(IC-W21) Transmit expansion for IC-W21
1. Call Icom Parts Dept. and order one diode MA132WK (D.23) for IC-W21AT, Symbol: MU; 2. Open radio and localize the logic unit; The logic unit is the half portion of the radio that contains the CPU, display, keyboard, etc.; 3. Localize some orange colour components in the lowset right part of the portion, below the CPU shield plate. Localize the smallest orange colour component. Note a empty place for a surface mount diode (3 dots) near this orange component (see draw below);
-----:. <---- Empty place for surface mount diode MA132WK |oran-----------| | DIAL button | ge / :<>. <---- Surface mount diode | CPU | | ----- / mounted | Shield | | U vol button ^ | Plate. | |. | V vol button |Smallest orange colour component ------|------------| ---PTT,F,Moni.
4. Add D23 MA132WK diode in the empty place. Do use very fine soldering iron and temperature controlated gear. The circuit is very fragile and may burn if excecive heat is applied. Take care for static damage also; If you can, use professional gear for this purpose or find technical assistance of your choice.
This modification is read 960 times.
(IC-W21) Full cross band repeater operation
This feature enables HT to receive on one band and retransmit the content to the other band. You can even choose tone squelsh selections, repeater offsets and many other features available during normal operation. 1. Select frequencies on VHF&UHF and options (tones, DUP,.); 2. Set "key lock" by pushing [F]+[C] keys. Then turn radio off; 3. Push [F]+[MONI]+[RPT-M] keys and while holding them pressed, turn radio on. You will get flashing "L", telling you cross band rpt. is enable. 4. Press [F]+[C] ("key lock" release) and you will clear the cross band rpt. mode.
(IC-W21) Band expansion 50-999 MHz for IC-W21
The Icom IC W21AT handi-talkie normally receives two bands: 136 to 174 MHz and 440 to 450 MHz. You can program it to receive 50 to 300 MHz and 300 to 999 MHz. To do this, turn it off, then simultaneously hold down the # and the B keys while turning it on. Keep them pressed for 2 seconds after turning the rig on. The LCD display will go through a self test, and you'll then have a wideband receiver. It's not very sensitive far from the ham bands, but it's handy for listening to 6 Meters or as a portable scanner. Note that this modification does not require any cutting of diodes or rewiring -- it's entirely front panel.
(IC-W2A) IC-W2A Expand frequency
This is less of a mod than it is a function. To expand the receiver frequency range of the new Icom IC-W2A to 118.00-170.00, 322.00-513.00, and 800.000-970.000, do the following: Hold down the Light, B, and # keys while turning the power on. That's actually a four button sequence, since power on is controlled by a keypad button.

_____________________________ |_ ic341 ic201 o ic5 flat cabel HHHHHHHHHHHH ______________________________| o | 5| |__ | | O | _| __|__ |diode| |_____| | | | O_|


1=D528, 2=D52, 3=D525, 4=D523, 5=D531 All diodes have 3 legs! Then push for RX expand. Crossband repeater function is possible on the IC-W32E but it dosent work on my radio. It depends on witch CPU U have. But U
could always try it. Set VHF and UHF FQs, turn tone squelch on, turn lock function on, turn off the tranciver, push [SQL], [MAIN] and [BAND] keys and turn power on. E-mail: packet:
This modification is read 2327 times.
(IC-W32) To extend the receiver and open up 800 MHz receive (cellular blocked) for IC-W32A
Turn off the radio Press and hold the band and squelch buttons. Turn on the radio while holding these buttons, wait for 5 seconds before you release the band and squelch buttons. Now the receiver should be opened up as far as it will go.
Date: 31-12-2001 Subject: All IC-W32-A Pushbutton Mods

From: Scott KF4JDP Terry

Not functional any longer,Tried all of them and none of them work. If anyone has an explaination please E-MAIL me Thanks Scott 73 Date: 22-03-2002 Subject: IC-W32A Firmware Change Apparently Icom made a firmware change at some point to comply with FCC guidelines regarding cellular telephone reception. There may have been other issues relating to it, but the short version of it is W32A's after a certain point no longer had the "super-extended" receive the earlier units did. It usually revolves around cell-phone reception though. I mean, God forbid if we overhear someone order a pizza or something. R. Evans KE4RWS
This modification is read 2466 times.
From: Randy Evans, KE4RWS


(IC-W32) IC-W32 TX modification. Only a picture.


(IC-W32) ICW32 E Crossband repeater
Author: Dr. Werner Furlan -
A. Aktivieren des Crossband-Repeater-Betriebs beim Handfunkgeraet IC-W32E: 1. VHF- und UHF-Frequenzen einstellen. 2. Squelch-Funktionen in beiden Baendern auf Rauschunterdrueckung stellen. 3. LOCK aktivieren. 4. Ausschalten 5. SQL+MAIN+BAND gleichzeitig gedrueckt halten und einschalten. Schluessel im Display blinkt. B. Deaktivieren des Crossband-Repeater-Betriebs: SQL halten und LOCK druecken. 73! Werner OE9FWV

IC-M9 - Hold [HI/LO] & [DW/SCAN] buttons and turn the radio on. Wait until CH 16 displays on the LCD. IC-M10 - Clone with a computer. IC-M11 - Turn the radio on, hold [LIGHT] & [FUNCTION] buttons, turn the radio off, then turn back on. Release the buttons after the display returns to normal. IC-M15 - Hold [HI/LO] & [CALL] & [DUAL] buttons and turn the radio on. IC-GM1500 - Clone with a computer. M O B I L E S: IC-M45 - Clone with a computer. IC-M45A - Clone with a computer. IC-M55/B - Remove the plastic screw from the bottom cover and push the reset button underneath the screw. IC-M56 - Turn the radio on, hold [CH16] & [MR] buttons, turn off, then turn the radio on again and release the buttons. IC-M57 - Hold [CH16] & [HI/LO] buttons and turn the radio on. Hold the buttons for approximately 3 seconds after the radio comes back on. IC-M58 - Clone with a computer. IC-M59 - Clone with a computer. IC-M80 - Disconnect the lithium battery, ground all CPU pins to chassis. IC-M100 - Turn the radio on, hold the squelch knob and press [RESET] IC-M120 - Turn the radio on, hold [CH16] & [USA], turn the radio off and then back on. IC-M125 - Hold [FUNC] & [CH16] buttons and turn the radio off and back on. IC-M126 - Hold [FUNC] & [CH16] buttons and turn the radio off and back on. IC-M127 - Clone with a computer. IC-M500 - Hold [DIMMER] & [13/67] buttons and turn the radio on. N A V I G A T I O N: FF-88 - No reset available. FP-561 - Hold [MENU] button, turn the unit on, choose "all reset" and turn the unit off. MR-40 - No reset available. MR-61 - No reset available. MR-610 - No reset available. S S B R A D I O S: IC-M600 - Hold [FUNCTION] & [CE] and turn the radio on. IC-M700 - CPU reset not available. IC-M700PRO - Clone with a computer. IC-M710 - Clone with a computer. IC-M710RT - Clone with a computer. IC-M800 - Remove DC power from both the control head and the main unit. Wait approximately 5 minutes. IC-M810 - Remove DC power from both the control head and the main unit. Wait approximately 5 minutes. Avionics: H A N D H E L D S: IC-A2 - Push [F] & [PTT] buttons and turn the radio on. IC-A3 - Hold [F] & [0] & [ENT] buttons and turn the radio on. IC-A4 - No keypad reset, clone with a computer. IC-A20 - Push [F] & [CLEAR] buttons and turn the radio on. IC-A21 - Push [F] & [CLEAR] buttons and turn the radio on. IC-A22 - Hold [F] & [0] & [ENT] buttons and turn the radio on. G R O U N D / M O B I L E: IC-A110 - Clone with a computer. IC-A200B/M - No CPU reset. P A N E L M O U N T: IC-A200 - No CPU reset. Land mobile: P O R T A B L E S: IC-F3 - Reclone IC-F3G - Reclone IC-F3S - Reclone IC-F4 - Reclone IC-F4G - Reclone IC-F4S - Reclone IC-F4TR - Reclone IC-F10 - Reclone IC-F20 - Reclone IC-F30 - Reclone IC-F30LT - Reclone IC-F40 - Reclone IC-F40LT - Reclone IC-H8 - Reclone or hold [PTT] & [CLONE] buttons and turn the radio on. IC-H10 - Reclone or hold [PTT] & [CLONE] buttons and turn the radio on. IC-H16 - Reclone



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