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Icom IC-706MkIIG Quick Start Manual
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Icom IC-706MkIIG Quick Start Manual

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KV5R: Icom IC-706MkIIG Mods and Tips
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Icom IC-706MkIIG Mods and Tips
Everything for Icom 706 Fans in One Place.
Introduction
Ah, the li'l 706: What can I say? I like it! It
performs like big radio, but it's small. It
sounds good, and it's well made. You can add
the remote kit and put the control head and
the radio box where ever you want them. The
price is right.
This article is a handy compilation of most of
the mods and stuff I have developed or found on the web for the
706MkIIG, plus a chronicle of the little accessory kits that I have built
to enhance my enjoyment of the 706.
Disclaimer: The author assumes absolutely no responsibility, under
any circumstances, for what the reader may do with this information.
Building and connecting circuits, and performing adjustments or
modifications, may damage your radio, void your warranty, and/or
cause it to operate in violation of FCC rules and Type Acceptance, etc,
unless you are VERY CAREFUL.
Brand New 706 Setup
The 706 comes with several factory defaults that you'll want to
change. The recommended changes make the radio easier to operate.
First, let's set up the power-on defaults.
file:///C|/My%20Downloads/Icom/706.asp.htm (1 of 15)5/4/2009 11:29:12 PM
Page Index
Brand New Setup
Frequency Calibration
Locating
Frequency Expansion
Filters
Links
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Summary of Contents for Icom IC-706MkIIG

  • Page 1 KV5R: Icom IC-706MkIIG Mods and Tips wood-floor Icom IC-706MkIIG Mods and Tips Menu Everything for Icom 706 Fans in One Place. Home Introduction Articles Index Page Index Web Development Ah, the li’l 706: What can I say? I like it! It...
  • Page 2 KV5R: Icom IC-706MkIIG Mods and Tips LF Converter Go to Initial Set Mode by power off, hold Lock button and power on. Noise Bridge Refer to the initial setup items on pages 50-55. CW Key Base Digital Item 1: You can turn off modes that you don’t want the Mode button...
  • Page 3 KV5R: Icom IC-706MkIIG Mods and Tips default. Set it to "On 2" and the 2 meter band will automatically set the right offset when you are in the range of the usual repeater bands -- 600 negative below 147, and 600 positive when above 147. This will save you a lot of extra offset-setting while you are programming your repeater channels.

  • Page 4: Frequency Calibration

    KV5R: Icom IC-706MkIIG Mods and Tips 3. Setting the mike gain at 4-5 and talking across it is sufficient for all bands and modes. 4. Do not use the processor (CMP) except in extremely marginal conditions! The supplied hand mike is so clear that the added "punch"...
  • Page 5 KV5R: Icom IC-706MkIIG Mods and Tips NOTE! Various 706 models use different parts to calibrate the Master Oscillator. Refer to your Instruction Manual. Additionally, the lower diagram on page 63 (11: Internal Views) in my Instruction Manual is wrong: 1. In the position shown as R602 is a trimmer capacitor (coarse adjustment), and 2.
  • Page 6 KV5R: Icom IC-706MkIIG Mods and Tips 2. Increase your room temperature 10 degrees above normal and stabilize it. 3. Lay the radio upside-down on a pad, front facing you. 4. Connect power and antenna. 5. Remove the bottom cover and set it aside.
  • Page 7 KV5R: Icom IC-706MkIIG Mods and Tips 3. Repeatedly adjust the VR, very carefully, until no frequency shift is seen on the computer. It is possible to get within 1 Hz. 4. Note: Your computer soundcard clock may not be calibrated, so you may not see 600.0 Hz on the status line frequency readout.
  • Page 8 KV5R: Icom IC-706MkIIG Mods and Tips the old (to get the ratio) then divide the error by that. Using this technique, I was able to win the 2004 ARRL FMT award certificate by getting within 0.04 Hz! 5. You can determine the frequency error of other people’s radios. Have them set to some exact reading and transmit a carrier for 10 seconds or so.
  • Page 9 KV5R: Icom IC-706MkIIG Mods and Tips Since I live in a 30-foot trailer, my station must be small - just 2 shelves. The radio and power supply are mounted below the lower shelf. Not shown: MFJ-949E replaced with MFJ-993 IntelliTuner. (Note the crystal radio on the left, and the 25-1300 MHz scanner on the right...)
  • Page 10 KV5R: Icom IC-706MkIIG Mods and Tips My latest bedside operating desk. Middle shelf slides out for use. 706 head mounted underneath top shelf on PanaVise cell phone mount. file:///C|/My%20Downloads/Icom/706.asp.htm (10 of 15)5/4/2009 11:29:12 PM...
  • Page 11 KV5R: Icom IC-706MkIIG Mods and Tips Left: Another idea for control head placement. Right: The radio, and major bird nest, is located under the desk, out of the way. Power supply and computer interface under there, too. Mounting rear-down enhances cooling and prevents cable strain.
  • Page 12 5. Extremely steady hand How to remove it (D2030): (IC-706MkIIG ONLY - Top PCB - Red Arrow Indicates tiny SMT Diode to Remove.) 1. Some people just crush it with needle-nose. I don’t like that idea since it might damage the PCB.
  • Page 13 If you run CW or narrowband digital modes like PSK-31, you need a narrow filter. I recommend the FL- 232, 350Hz CW-RTTY filter. It is available from all Icom dealers. Look for the best price online. I have seen them as low as $79.95 (Universal Radio), and HRO sold me one for the rock-bottom price of $78.
  • Page 14 KV5R: Icom IC-706MkIIG Mods and Tips Pop the filter in, then go into setup and tell the radio it’s an FL-223 (not 232). This will allow you to select the filter in SSB mode, as well as CW and RTTY. This will allow you to select Narrow on SSB and have about a 450Hz wide bandwidth on your waterfall.
  • Page 15 706Mk2G- 2100+ hits G3VFP’s Fantastic List of Schematics, Circuits, and Software- too cool! www.mods.dk- Frames: Click 'Icom' then click 'IC-706Mkii' then click 'view all mods' then save it. Yahoo! Groups : ic706 Messages- Users discuss all the details eHam.net Reviews - ICOM IC-706 - All...