My IC-781, and its Successors An IC-781 graced my shack from mid-1993 until late 1998. I found that it was lacking in adjacent-channel selectivity on SSB, so I installed the 'NATO' filter mod - FL-44A in lieu of FL-96. I also replaced the stock FL-102 with an FL-223 for narrow SSB. Tamil Movie Mp3 Songs Free Downloads Latest. Then, I bought an 'original' IC-756. The 756, with its DSP NR, outgunned the 781 + outboard NIR-12 on weak/noisy signals, and offered superior adjacent-channel selectivity with the FL-222/223 SSB filter pair installed.

Copystar Cs-2115 Service Manual. The Icom IC-775DSP lets you pull out weak signals no one else can. Serious DX'ers require serious equipment. While the 775DSP may be fun to operate, it was engineered.

So I reluctantly let the 'old girl' go. Whilst living in Florida, I was an NCS on the Icom Users' Net (formerly 14317 kHz, Sundays, 1700Z) for several years. At times, adjacent-channel interference became a severe issue, what with our frequency sandwiched between the 'hot-spots' which used to occupy 14313 and 14322 kHz. The Icom Net has since moved to 14.316 kHz, to get away from the fourth harmonic of the TV colour-burst.

Even with the 'NATO' filter upgrade and the FL-223, the ACI and splatter would sometimes overwhelm the 781. I found that the IC-756's cascaded 1.9/1.8 kHz narrow SSB filters (FL-223/222), together with Twin PBT, did a better job of 'pulling out' the desired signal than the IC-781. Another situation which frequently arose was trying to copy a check-in station running barefoot to an indifferent antenna; often, his signal was in the noise. I found that the DSP noise-reduction feature of the IC-756 often resolved these weak signals well enough for Q4 to Q5 copy, when they eluded the 781 - even with an outboard JPS NIR-12 audio DSP box.