Henry,
I believe you will find the arguments similar to those among audiophiles
when recorded music was changing from vinyl to CDs.
My take on the subject is that the dynamic range of the digital
techniques exceeded the analog by a wide range you will not be able to
discern the microprocessor noise at normal or even very high listening
levels.
Take a look at the dynamic range and MDS of modern hybrid (like the
K3/K3S) receivers or good SDR receivers (like KX3 or KX2), in comparison
to some of the best analog receivers, and you should find that the
dynamic range is much greater (indicating its resistance to overload and
distortion is greater). That increased dynamic range gives rise to a
better MDS - in other words, it can hear weaker signals.
The mathematics in the DSP code is not going to cause distortion unless
the ADC is overloaded with a strong signal (good design says that should
not happen).
The Sherwood listings will verify what I am saying - yes, there are
several analog tube-type radios in the Sherwood listing, but they are
pretty far down the list.
Any microprocessor noise should only be introduced in the audio section,
and with good design, that should not happen either - oh yes, if you
have very good ears, you might be able to hear some at a very low level
if you turn the AF gain up all the way, but that is not a normal condition.
If your ears feel that the tube audio gear is "warmer" than the solid
state stuff, then consider that the tube gear generates some 2nd and 3rd
order distortion which is normally what makes it sound "warmer". There
are devices available for solid state audio which add a bit of that
"warming sound" to better satisfy the ears of those who like to hear it.
Certainly, the large speaker enclosures used with old tube-type radios
sound much better than the small speakers in compact solid state radios,
so please don't compare based on those speakers. Connect a good quality
audio system to both radios if you want to make a comparison of that sort.
73,
Don W3FPR
On 6/4/2018 8:49 AM, Henry Pollock - K4TMC wrote:
Yes, I would like to here what others can add to this thread. One of my
past hobbies was high-end tube audio electronics, and in numerous set-ups,
they sounded superior to solid-state equipment.
So, my additional question would be...is the microprocessor
noise/distortion affecting the RF signal or just the AF signal, or both?
73,
Henry - K4TMC
On Sun, Jun 3, 2018 at 7:46 PM, Ron Genovesi <n3...@coastside.net> wrote:
I’m interested. Keep the thread going here
Ron Genovesi
Sent from My iPad
On Jun 3, 2018, at 7:22 AM, Kjeld Holm <k...@kh-translation.dk> wrote:
Dear Bill,
Parts of the answer can be found at
http://www.sherweng.com/table.html
search for Collins and you will get some 3 - 5 hits.
Vy 73 de OZ1CCM, Kjeld
-----Original Message-----
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill
Sent: 3. juni 2018 15:17
To: elecraft@mailman.qth.net
Subject: [Elecraft] Compare: K3 to Collins S-line receiver
Discounting the digital capabilities such as memories, DSP, etc. and
only considering actual signal reception: I have had S-lines in the past
(dark dim past), so certainly am familier with them. However, as a point
of curiosity, how does the S-line compare to the K3 (only interested in
SSB). Basically, I am interested in how a top of the line analog
receiver does compares to a K3(S)? The question comes from a QSO
regarding the microprocessor noise of modern rigs covering and/or
distorting received signals. Offline response might be good for this, as
I am sure not many would be interested in the subject.
Thanks, Bill W2BLC K-Line
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