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If your IC-706MKIIG will not power up without even hearing a relay click, check the state of the HV line.

706 MKIIG picture and specifications by rigpix db

A complete review of Icom IC-706 review published in 1999 by QST

This modification will allow the MkIIG to transmit on most of the frequencies that it receives on.

Wiring Color Code and Pinouts for IC-706MkIIG and HM-103 Mic

You wanna try to work modern satellite like AO-40 but have only one rig ICOM-706MKIIG ? This article will help you.

The X80 multi-band HF vertical antenna, a commercial iteration of the Rybakov design, exhibits a physical length of 5.5 meters, or approximately 18 feet, and is constructed from aluminum tubing. It operates as a non-resonant vertical, requiring an external antenna tuner for impedance matching across its intended operating frequencies. The antenna's design incorporates a 1:4 UNUN at its base, facilitating a nominal 50-ohm feed point impedance for the coaxial cable. Performance observations indicate effective operation on 40 meters, 20 meters, 15 meters, and 10 meters, with reduced efficiency on 80 meters and 160 meters due to its relatively short electrical length for these lower bands. Comparative analysis with a G5RV dipole and a half-wave end-fed antenna reveals the X80 offers a lower take-off angle, beneficial for DX contacts, particularly on the higher HF bands. Field tests conducted with an Icom IC-706MKIIG transceiver and an LDG AT-100ProII autotuner demonstrate the X80's ability to achieve acceptable SWR across 80m through 10m. The antenna's compact footprint and ease of deployment make it suitable for restricted spaces or portable operations, though its performance on 80 meters is noted as a compromise compared to full-size resonant antennas.

Computer Control and Soundcard Interface for the Icom IC 706

KV5R review of the Icom 706MkIIG

Microphone tips for the Icom 706MkIIG

Review site of the Icom IC-706 MkIIG by KV5R

Review of the Icom IC-706 series, include a short demo video and a short menu table available for download

Icom 706MkIIG Filters, Make a narrow CW filter work in SSB for the digital modes

Unlike older radios, the 706 uses only one crystal oscillator (called the Master Oscillator). All other frequencies in the radio (L.O., 3-4 I.F. stages, VFO, and CW-offset) are computer-derived from the Master Oscillator. This makes it relatively simple to frequency-align the radio, so that it agrees with the Frequency Display in all modes.