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- #Icom 756 pro ii headphone jack type manual#
- #Icom 756 pro ii headphone jack type full#
- #Icom 756 pro ii headphone jack type mods#
The horizontal frequency display is inthe digital domain, and thus never goes out of cal.
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#Icom 756 pro ii headphone jack type mods#
Icom IC-756 PRO (IC 756 PRO IC756PRO) transceiver mods reviews software and diagrams The vertical sensitivity of the Pro Spectrum Scope is significantly higher than thatof the The only alignment procedure for the ICPro spectrum scope isvertical amplitude alignment and calibration.
#Icom 756 pro ii headphone jack type manual#
The manual notch is alsohelpful in improving the SNR of the received signal. Those signals would have been barely intelligible on the The ability to tailor thefilter passband to the received signal using the Twin PBT or the filter tables also provides a superb tool for pulling out the "weak ones". I am able to copy easily SSB signals which do not move the S-meter. The measured sensitivityon 20m with Pre-amp 1 on, and Hz bandwidth, is 0. Overall, the Pro pulls the "weak ones" out of the noise noticeably betterthan the or any of its other predecessors in my shack did. These are clearly due to the NB gatingon signal peaks, and are eliminated by switching the NB out. I observe significant artifacts under strong-signalconditions only when the noise blanker is enabled. The combination of the DSP-NR and noise blanker renders night-time 40m listeningmuch more pleasant and less fatiguing. I find the Pro a big improvement over its predecessor, the The DSP IF filters have much steeper skirts than the analogue crystalfilters in the older rig, and are much more effective against adjacent-channel QRM than analogue filters.Īlso, read George's "Notes on roofing filters" below. Fluctuating RF output.I amdelighted with the Pro. The symptoms can be one or more of the following: Unusually high current demand from the power supply.
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Reduce power to 10 watts, then increase power after tuning.
#Icom 756 pro ii headphone jack type full#
Running full power during antenna tuner adjustment. Lightning surge, precipitation static, or static buildup on the antenna. This may help protect against RF-overload from a nearby transmitter. NOTE: The previous two photos depict an extreme and rare example. While he was transmitting from his other station, his wife alerted him to smoke coming from his ICPRO in another room. NOTE: The following two photos depict an extreme and rare example. The pictures below show a worst-case scenario. The collector voltage should be around If left unchecked, the situation may deteriorate until the damaged SMD components overheat and become charred, possibly damaging the circuit-board. The base voltage should be 0-volts RX, and 0. This test works because the attenuator interrupts the path of oscillation. The symptoms can be one or more of the following. This will not affect the 2-meter band on the series. But many times, the only noticeable issue is the transmitter will tend to oscillate intermittently on the higher HF bands 6, 10, or 12 meters. Important Note: Although I have first-hand knowledge of the damaged circuitry and the necessary repairs, I only have second-hand knowledge as to the cause of damage, which was acquired by interviewing customers about their station setups and operating practices.