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1. #ICOM IC 756 PRO II DIMENSIONS MOD#
2. #ICOM IC 756 PRO II DIMENSIONS DRIVER#
3. #ICOM IC 756 PRO II DIMENSIONS MANUAL#

There have been some improvements in operational convenience.

In August 2007, I performed an ALC overshoot test on my Pro3/Quadra station. Positive voltage should never be applied to the ALC jack. 4 bars for the Pro2.Īs is the case for all other Icom HF transceivers, the rear-panel ALC jack is compatible with a negative-going ALC voltage in the range 0 to -4V. The ALC is a little less sensitive I need to set the Quadra ALC menu to 5 bars for 1kW output, vs. The first mixer has lower gain, with the result that the scope module in the Pro3 has its own RF amplifier to bring up the vertical sensitivity of the scope. There has also been a significant gain redistribution. Preamp 1 has negative feedback to improve linearity without compromising NF. In the Pro3, the preamps have been designed for highly linear large-signal handling, consistent with a low noise figure. When switched in, Preamps 1 and 2 do not raise the audible noise level in the receiver as much as they did in the Pro2. S9 + 60 dB signals 1 to 2 kHz above and below our channel edges did not produce any perceptible artefacts in the received audio.

In addition, the Pro3's strong-signal behaviour appeared to be excellent.

#ICOM IC 756 PRO II DIMENSIONS MANUAL#

I am able (by using a combination of NR, NB, Twin PBT and Manual Notch) to squeeze intelligible copy out of the assorted "garbage" on the band more effectively than on the Pro2. The next day, I was able to sustain the sked with my friend Matt KK5DR somewhat longer, as the Pro3 "hears" signals buried in the noise somewhat better than the Pro2 did. I find myself routinely operating with the preamp off on the Pro2, I invariably had Preamp 1 on. Overall, I would judge that the S/N ratio is better than on the Pro2, even in the presence of power-line noise. The NR and NB appear to have been significantly improved. I was able to work a number of SSB stations on 40m which I would not have heard on the Pro2. Preliminary findings are that it pulls weak, noisy signals out of the noise somewhat better than the Pro2. That evening, I installed the Pro3 in my station. On June 30, I picked up my new IC-756Pro3 (S/N 32025XX) at a local dealer. If you prefer to be anonymous write it in the message.Adam, VA7OJ/AB4OJ's IC-756Pro III User ReviewĪdam, VA7OJ/AB4OJ's IC-756Pro III User Review Initial observations (July 2005) If the message is relate to an article, the article can be selected next to each message.Ĭlick here to write a new message or comment for IC-756 Note that the message is not related to any article.Ĭlick here to see the article list for IC-756.ĭo you have any tricks, modifications or constructions for homebrewed equipment that are not on mods.dk, please send the information to mods.dk. This forum message list include all message for that is related to IC-756, this include message that also is related to articles. Note that page can take a while to load, if there are many modifications.

#ICOM IC 756 PRO II DIMENSIONS MOD#

TX Mod (1.6 - 30.0MHz)Ĭlick here to view all the ABOVE modifications for ic-756 in one page. ICOM IC-746 & IC-756 Series: Damage Due To RF-OverloadĬonvert FL-32A, FL63A into FL-100, FL-101 sockets Modification to replace the wimpy Omron Send Relay in IC-756 Low output on all bands intermitent on IC-756ĪLC Supply for Improved AM TX Modulation & Power Control on IC-756ĪM Filter for the Icom IC-756 (non-Pro model)

#ICOM IC 756 PRO II DIMENSIONS DRIVER#

2SC1972 driver stage repair in the ICOM IC-756 and other radios