As I recall it was RCA at the dawn of HI-FI who did a test using a
live orchestra and a physical passband filter to garner listener
response. The audience did not know whether the filter was in or not
The results were that people found the orchestra without the filter
sounded unnatural. Thei
I agree. These artificacts have "sidebands" that increase and
decrease with content in the normal passband, but their separation and
frequency span is as if the frequency content (not the amplitude) of
the normal passband were divided by 2 or 4. They are way down, and do
not exceed the amplitude
;
> That is my observation and report, and MHO. Happy New Year to all.
>
> Milt, N5IA
>
> - Original Message -
> From: "David Cutter"
> To: "Julian, G4ILO" ;
> Sent: Saturday, January 09, 2010 3:30 AM
> Subject: Re: [Elecraft] RX Test (long
0 5:11 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] RX Test (long)
>
>
>
>
>
> Joe Subich, W4TV-4 wrote:
> >
> >
> > Here is the genesis of the complaint that the K3 is more
> > fatiguing than other receivers. The out of band noise
>
..@subich.com
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] RX Test (long)
>
>
> So what you are saying is the K3 is too quiet for its own
> good, and that's what makes it so noisy!
>
>
>
> - Original Message
> From: "Joe Subich, W4TV&quo
gt;> So what you are saying is the K3 is too quiet for its own good, and that's
>> what makes it so noisy!
>>
>>
>>
>> - Original Message
>> From: "Joe Subich, W4TV"
>> To: d...@w3fpr.com; Al Lorona
>> Cc: Elecraft Reflector
>
is not detrimental; in fact I can say that it is
advantageous to ME.
That is my observation and report, and MHO. Happy New Year to all.
Milt, N5IA
- Original Message -
From: "David Cutter"
To: "Julian, G4ILO" ;
Sent: Saturday, January 09, 2010 3:30 AM
Subjec
that's
> what makes it so noisy!
>
>
>
> - Original Message
> From: "Joe Subich, W4TV"
> To: d...@w3fpr.com; Al Lorona
> Cc: Elecraft Reflector
> Sent: Fri, January 8, 2010 8:46:21 PM
> Subject: RE: [Elecraft] RX Test (long)
>
>
>
> However, the s
Sorry, I don't buy the theory that the low-level stopband artifacts are
responsible for the perception of the K3 being "noisy". To my ears and
tests I've conducted multiple times, the artifacts are audibly masked in
listening, even without the LPF.
On spectrum analysis, I see artifacts in desc
If the K3 is being used by a contest group or dxpedition, for instance, you
will have a wider range of hearing sensitivities and these activities force
us to concentrate a lot more and use a radio for long periods. On this
basis, fatigue due to these artefacts should be eliminated for the benef
Joe Subich, W4TV-4 wrote:
>
>
> Here is the genesis of the complaint that the K3 is more
> fatiguing than other receivers. The out of band noise
> (noise above 5 KHz) in the K3 is, as you say, at least 60 dB
> below the peak audio level (actually, I measure it at more
> than 90dB down abo
So what you are saying is the K3 is too quiet for its own good, and that's what
makes it so noisy!
- Original Message
From: "Joe Subich, W4TV"
To: d...@w3fpr.com; Al Lorona
Cc: Elecraft Reflector
Sent: Fri, January 8, 2010 8:46:21 PM
Subject: RE: [Elecraft
after documentation) I will
not speculate as to the source.
73,
... Joe, W4TV
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm
> Sent: Friday, January 08, 2010 9:06 PM
> To: A
Why would you not want to look at the noise footprints with a spectrum
analyzer? Your ear may tell you that there is something there that you
don't like, but the spectrum analyzer will tell you what it is. If you
are making audio files, send me a copy and I'll take a look at them for
you and
I've also considered that theory. It would be interesting (and easy
with an external audio mixer) to add a little pink noise to the audio
output to see if that "mellows" the sound a bit.
73
--
Joe KB8AP
On Jan 8, 2010, at 6:05 PM, Don Wilhelm wrote:
> So my supposition is that we are not a
I might add - perception is 99% of reality. I write of theoretical
terms, but how the human ear/brain combination perceives things of this
nature is indeed a subject for reflection and discussion.
I expect that there will be many on both 'sides of the fence'.
73,
Don W3FPR
Al,
From the test
Al,
From the tests I have done, I discovered that the K3 has a flat
passband and very sharp filter skirts - in fact, very close to the
"ideal" filter sought by many in past years. Other receivers tested
(K2, Yaesu FT-900, FT-817) showed that their passband was not flat, but
tapered smoothly
Hi, Everybody,
What great comments I got from you in private e-mail messages. It's highly
interesting getting your perspectives on receivers and listening.
Due to day job and family I can't respond to every observation and
objection but in particular Doug KR2Q-- who has some of the best ears in
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