Rob Sherwood and the ARRL have had a long standing dispute (for about 3
years now) on how to best measure receiver performance of a transceiver.
During those three years, I have fully supported Rob's standpoint.
HOWEVER, recently, once again, the ARRL changed their methodology for
measuring receivers.
INMO THIS TIME THE ARRL HAS ADDED VALUE.
For the first time EVER, they have discriminated between the needs of a dxer
and a contester.
In most respects they are the same but there are actually subtle
differences.
In fact the best radio for a contester may very well not be the best radio
for a dxer.
Then what?
It would behoove everyone here to read the ARRL's explanation about why they
changed their methodology, and THEN look at stuff like this comparison. In
fact, IMO, this comparison was worthless. PERIOD.
It was fun to watch and we Ten-Tec Kool Aid drinkers (me included) enjoyed
it, but it's a farce.
I WOULD WARN *EVERYONE* HERE NOT TO PLACE TOO MUCH WEIGHT ON BENCHMARKS OR
TEST RESULTS.
Not from Rob and not from ARRL. Yes, both are valuable but you have to use
their results as just one of many factors in evalutatin what radio is the
best for you.
We have our radios for our fun and enjoyment. That is the main reason.
None of these test do anything to reflect any measurement of fun and
enjoyment. The fanatics among us (again, me included) who want to do
extreme ham radio (be it contesting, or dxing), place more demanding
requirements on our radios and are willing to overlook many things which
contribute to the overall joy of owning an operating a radio. As such, "my
radio" may very well not be the best radio for you.
We can sum this all up with what all of us already know: "Take everything
you read here with a big grain of salt."
73
Rick, DJ0IP
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Barry N1EU
Sent: Friday, February 01, 2013 3:33 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Yaesu comparison
The dsp filtering slopes are normally much steeper than the roofing filter
slopes. What we should be looking at in that video is purely the dsp
filtering, assuming the user hasn't somehow enabled shallow dsp filtering.
Too many unknowns with no control/disclosure about the rig setup in the
experiment.
73,
Barry N1EU
On Wed, Jan 30, 2013 at 5:49 PM, Billy Cox <aa4nu@ix.netcom.com> wrote:
> Bob,
>
> I believe you are discounting how well the "roofing filter" really
> protects the actual "IF" chain?
>
> Given today's platforms, the line is rather blurred as many would
> consider the "roofing filter" as being part of the IF chain too.
>
> Not nearly as easy to define as in years past as to either the DSP or
> the "roofing filters".
>
> Not so long ago, DSP was still primarily audio, not IF.
>
> The DSP systems we have today are excellent, but tend to still need an
> additional filter placed ahead in the system to prevent overload and
> other challenges.
>
> Rather interesting to see how Yaesu copied the K3, which followed the
> Orion platform, after the failure of their FT2000 platform with it's
> RX weaknesses.
>
> Of course Rob Sherwood needs to be remembered for his work with the
> Drake platforms that started all of this!
>
> 73 de Billy, AA4NU
>
>
> -----Original Message-----
> >From: Bob McGraw - K4TAX <RMcGraw@Blomand.net>
> >Sent: Jan 29, 2013 12:06 PM
> >To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
> >Subject: Re: [TenTec] Yaesu comparison
> >
> >First I'd say that a roofing filter has little to do with actual
> >receiver
> IF
> >selectivity. In other words, the roofing filter is pre the DSP
> selectivity
> >which would typically be less than the BW of the roofing filter.
Today's
> >receivers develop their selectivity in the DSP system.
> >
> >In the referenced video, I could not discern the DSP selectivity of the
K3
> >or the FT-5000. The Orion II BW is 520 Hz.
> >
> >
> >73
> >Bob, K4TAX
> >
> >
> >DISCLOSURE:
> >This is to inform all persons, I am a Tentec Ambassador and I receive
> >compensation according to the Tentec Ambassador program. In
> >addition, I serve as a volunteer beta test person to Tentec for the
> >Omni VII, Eagle
> and
> >Argonaut VI radios. I hold no employment relationship, no financial
> >interests nor do I conduct any commercial business, direct or
> >indirect,
> with
> >Tentec.
> >
> >
> >
> >
> >
> >
> >
> >
> >----- Original Message -----
> >From: "Dan Thompson" <w4uh@bellsouth.net>
> >To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
> >Sent: Monday, January 28, 2013 3:05 PM
> >Subject: Re: [TenTec] Yaesu comparison
> >
> >
> >> Here is a You Tube comparing the K3, Orion II, & FT5000.
> >> http://www.youtube.com/watch?v=8SqVBkA535o
> >>
> >> 73, Dan W4UH
> >>
> >> -----Original Message-----
> >> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of
> >> k4elo@fastmail.fm
> >> Sent: Sunday, January 27, 2013 6:47 PM
> >> To: tentec@contesting.com
> >> Subject: [TenTec] Yaesu comparison
> >>
> >> Has anyone on the list had the chance to do an A/B comparison
> >> between the Orion II and the Yaesu FTdx5000? Particularly in terms
> >> of ssb selectivity.
> >>
> >> I used to have an Orion II and sold it (bad move!), but now much
> >> later, have a Yaesu FTdx5000, but I am not satisfied with it's
> >> selectivity, maybe due to only a 3 kHz roofing filter. So I am
> >> seriously thinking of going back to the Orion with a 1.8 roofing
filter.
> >>
> >> Any comments?
> >>
> >> Thanks and 73
> >> Wayne
> >> K4ELO
> >>
> >>
> >> _______________________________________________
> >> TenTec mailing list
> >> TenTec@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/tentec
> >>
> >>
> >> _______________________________________________
> >> TenTec mailing list
> >> TenTec@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/tentec
> >>
> >
> >
> >_______________________________________________
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