![]() ![]() ![]() 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. 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. This item comes with our in-store 30 day warranty.Adam, VA7OJ/AB4OJ's IC-756Pro III User ReviewĪdam, VA7OJ/AB4OJ's IC-756Pro III User Review Initial observations (July 2005) Screen saver function to prolong LCD life and reduce burn-in.Clock function displays local time and UTC time with time difference indication.Preamp changed to a noiseless feedback type to reduce second order distortion.Improved 1st filter and BPF for reduced distortion.Real time spectrum scope (with mini-scope).Improved Third Order Intercept point of +30dBm.This latest version offers some incremental improvements over the previous 756 Pro II: The ICOM 756 Pro III was the last member of the venerable "756" family that started with the 756 , 756 Pro , 756 Pro II. Included with this radio is the original manual, power cord, and HM-219 hand mic. All buttons are working great and the dials are all turning well. The exterior does not have any noticeable damage and all of the text is clear and intact. This radio has some minor dust in harder to reach areas. ![]() U7729 Used ICOM IC-756 Pro III HF/50MHz All Mode Transceiver ![]()
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