[Icom] Rig advice

[J. Keith Carter]

Hi George; I have great difficulty dealing with the use of the acronym DSP when
it comes to defining the performance of a receiver. I purchased the W9GR audio
DSP kit when it first was featured in QST many years ago. I used it with my 751A
and 735 for denoise and autonotch with great success and sold it only when I
purchased my IC-756 (original). BIG MISTAKE. The Icom DSP for denoise does not
hold a candle to the W9GR regardless of what QST said in their road test. I have
since found another W9RG and use it rather than the Icom denoise DSP and keep it
in the line all the time to eliminate the background random noise and hiss.
Which brings me to my complaint. When one says DSP on this reflector when
describing the PRO or PRO II, Are they just quantifying the DSP IF filters only?
IF so say so. Unless Icom have worked some miracles with their denoise DSP in
the later models,( and I have compared a PRO ) I think the audio versions can
compete and surpass. I guess what I'm saying is, Tell me what you're talking
about. I in no way contest the IF filtering characteristics of the Icom IF DSP,
but there is great doubt relative to the denoise capability. The autonotch seems
to be about the same when using the IF vs the audio. Just my humble opinion when
reading the mail. Keith, VE3JKC. Incidentally the Elkel K2 IF filter
characteristics are terrible. Even Elecraft admits this. 73.

"George, W5YR" wrote:

> Johnny,
>
> I echo Larry's remarks except to add that in my case I have kept my IC-765
> even though I have since purchased the original PRO and now a PRO2. The 765
> is a classic and built like a battleship. I recommend that if possible you
> hang onto your 765 and still get the PRO2. It is a much superior radio to
> the 765, but the 765 is still superior to a good many others.
>
> I use the JPS NIR-12 outboard audio DSP unit with the 765 and with my
> Elecraft K2. It is a big help but nowhere nearly as effective as the
> internal IF DSP of the PRO2.
>
> 73/72, George