In short, no.
With today's technology, there's almost no difference. The older the radio, the chances are that their *could* be a difference, but not as likely.
In the past, the true high-end consumer or professional "receivers" had better filtering elements in the circuitry. Back when I purchased my first Drake R-8 back in 1994, it was considered "Top of the Line" because it had several "receive-only" features. (This was before DSP.)
So, in short, the newer HF transceivers (amateur) that you see today are very, very good receivers as well. A good example is the Icom R75 and IC-718. They look to be the same technology - they use the same components. So either would make an effective SWL radio.
My case in point: I purchased an Icom IC-7000 as my main SWL radio last year (early 2008.) It was rated to have an excellent receive unit with very high-end features that most traditional SW radios could only dream about. For me, it was a no-brainer - as I'm a HAM as well. Transceiver that covers HF thru 70cm. Excellent receiver with DSP. No special filters to buy, etc. For $1200 it was a steal.
One fact to remember: the radios you mentioned are very good. And most HF transceivers in the last 15 years are still very good receivers. Some of those do not employ DSP at all (or at least not in the same way as they do now.)
To answer your question about the Kenwood radios - you would need to compare their respective dates of manufacturer -- and their obvious features. If they are of the same year, then yes, most likely they are of the same circuitry. Again, it just depends on what extra features Kenwood employed with the R5000 (e.g. filters, etc.)
In a technical frame of mind, the pure receivers are much easier to modify. This is why some love pure receivers - not a lot of extra circutry to get in the way.
Some other obvious key differences: built-in antenna tuners (on xcvrs), power consumption differences, number of antenna jacks, DC power connectivity, antenna connector types, hi-Z antenna connector, physical size/weight (portability), etc.
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Side note: Depending on your personal hearing preferences, some people prefer the older HF receivers and transceivers. DSP technology is a love/hate relationship. Listening to say a Kenwood R5000 and my Icom IC-7000 would be very obvious. To me, DSP has a way of making the sound somewhat tinny and artificial sounding. The non-DSP receivers tend to be more warm or softer in terms of the audio. The audio generally has more bass and sounds more natural. I can't help but wonder if this is because the speaker quality has dropped or if it's really the non-DSP electronics.
Hope this helps.
Last edited by nickcarr; 10-07-2009 at 05:18 AM..
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