Of course Paul is right, in theory.
But this point is being HIGHLY exaggerated.
If you use the radio as one would use it in a QSO, you can change headphones
all day long and you don't notice anything.
It's only when you place the radio in a state that it is totally useless to
us, that you hear this noise and then notice the difference between the
different headphones.
If the original poster is hearing noise under normal use, then his unit is
defective.
73,
Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec <tentec-bounces@contesting.com> On Behalf Of Paul Christensen
Sent: 20 August 2018 19:56
To: 'Discussion of Ten-Tec Equipment' <tentec@contesting.com>
Subject: Re: [TenTec] Audio improvements on Argonaut VI
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
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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