Your points are well taken and are correct.
I did and have looked at your QRZ site. Very impressive with all you've
done. Can't take anything away from you for your work. Nice!
73
Bob, K4TAX
On 8/20/2018 12:56 PM, Paul Christensen wrote:
Bob,
I would rather not post a brag sheet on my background in audio engineering.
It's not necessary, nor helpful to make a point. My comment was posted as a
general observation when using certain headphones to mask what I believe is
often an underlying design issue. To your point, I have not measured the
Argonaut VI nor was I referencing it.
If changing headphones (on any receiver) results in different levels of
residual hiss, noise, or artifacts, then the result is most often attributed
to: (1) differences in frequency response; or (2) the more likely cause
being a difference in headphone sensitivity. Less sensitive headphones
function much like an in-line audio attenuator where raising the post-AF
audio masks residual hiss, digital noise, and other artifacts.
Paul, W9AC
-----Original Message-----
From: TenTec <tentec-bounces@contesting.com> On Behalf Of Bob McGraw K4TAX
Sent: Monday, August 20, 2018 1:37 PM
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Audio improvements on Argonaut VI
Fine on your test equipment and work in audio. But have you actually
measured the performance of the Tentec Argonaut VI receiver? I have. My
audio experience is rather extensive. With 14 years as a recording
engineer with CBS Records and 15 years in tech support with SONY Pro Audio
and teaching Studio Electronics at Belmont college......just to mention a
few. I'm by no means a novice in the audio field.
Bob, K4TAX
Sent from my iPhone
On Aug 20, 2018, at 12:20 PM, Paul Christensen <w9ac@arrl.net> wrote:
"Have you heard, observed or measured the artifacts of this receiver?
If
not, you have no clue as to the minuscule magnitude of the issue."
Thanks Bob, but I think I have a clue. People who actually know me
(and my
background) also think I have a clue. I regularly use high-end audio
test equipment in my noise, level, and distortion measurements. Audio
test equipment includes a Tektronix AA-501A analyzer with an
ultra-low-distortion
SG-505 module. The Tek equipment is visible on the operating desk as
shown on my QRZ.com page. I also use SpectraPlus software with a
pro-grade sound card.
I stand by my prior comments.
Paul, W9AC
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