[TenTec] Audio improvements on Argonaut VI

[Paul Christensen]

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 at contesting.com> On Behalf Of Bob McGraw K4TAX
Sent: Monday, August 20, 2018 1:37 PM
To: Discussion of Ten-Tec Equipment <tentec at 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 at 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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