You may very well be correct, Carl.
Rob hasn't sent me any data on the 6500 yet.
I was assuming its performance and behavior will be in the ballpark of the
5000.
Just shows to go ya, assumptions are always dangerous!
All my earlier comments were based on my knowledge of the 5000's performance
so they may be totally off on the 6500, but I have to say I remain skeptical
until I've seen lab measurements and heard field feedback from a larger
Field Day operation.
REMEMBER: We were all astonished by the 5000's lab measurements, only to get
a reality check at Field Day.
However, still no knobs!
We're beginning to see some nice 3rd party PODs hit the market, so maybe
that problem will get solved too.
Then we only have to work on the price!
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Carl
Moreschi
Sent: Tuesday, April 08, 2014 4:47 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Wish List for ORION-III
NO the 6500 does not behave like the 5000. The 6500 has a clip point of
S9 + 80 DB. That's a HUGE signal.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 4/8/2014 9:40 AM, Rick - DJ0IP / NJ0IP wrote:
> Carl, Yes AND NO!
>
> For all of us operating at home (alone), YES. At least as far as
> technology goes. Not sure if operator acceptance is there yet.
>
> But, for a Field Day, especially a larger club with 5 or 6
> transmitters, you often find yourself in the situation that there are
> two stations operating on 40m at the same time (1 in CW, 1 in SSB),
> and two stations operating on 20m at the same time. Under THESE
> circumstances, the BDR3 of a Flex 6500 radio (or similar) drops by 20+dB!
> A K3 under the same circumstances does not drop in BDR3 at all and
> will easily out-perform the Flex.
>
> As it turns out, precisely the components that helps this technology
> achieve the great performance (by avoiding Crystal filter, additional
> oscillator, mixer, etc., all of which can cause additional IMD), are
> the cause of the drop in BDR3 in this specific case. Not having these
> components in the radio causes this drop. A decent crystal roofing
> filter would avoid this drop.
> IT'S A DOUBLE SIDED SWORD.
>
> It's described in one of Rob Sherwood's presentation (I forgot which
> one, but it's on my web). In that specific case it was the Flex 5000,
> but the
> 6500 will behave just like this.
> It was in one of the "BARC" presentations (probably 2009) and came up
> in the Q&A session after the slides were finished, so you have to
> listen to the long audio of the Q&A at the end of the presentation to pick
this point up.
>
> Most likely Rob will read this at some time and jump in with more info
> on this point.
>
> Unfortunately there is still no silver bullet.
>
> AND, if Ten-Tec were to do this, it would be "outdar" ahead of the
> power curve taking arrows in its back.
> Seems there are still an awful lot of people who want to have real
> knobs, especially amongst contesters.
> I have yet to see anyone using an SDR (knobless) radio win any major
> contest.
>
> My hunch is, at a Multi-Multi station where you have 6 stations
> running 1.5kW at once, you will see a similar drop in BDR3 - again due
> to missing roofing filter, BUT I DO NOT KNOW THIS TO BE FACT. JUST A
HUNCH.
>
> Finally, as for size, if the radio must be larger to fit everything
> in, then make it higher. My problem is with real estate on the
> desktop. I had to buy a new desk when I bought the Orion. I'd have
> to do that again if the O3 were that big again. (sold the old desk
> when I moved to the states in
> 20007)
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Carl
> Moreschi
> Sent: Tuesday, April 08, 2014 2:24 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Wish List for ORION-III
>
> Rick,
>
> This is all too outdated a way to make a transceiver now. The new
> best way is to create 100% digital data right at the antenna connection.
> Then everything is done in software. The new Flex 6500 does this and
> the results are totally amazing. No more crystal filters at all and
> the
> 2 khz dynamic range is above 100 db. I believe in a few years all
> good radios will be made this way.
>
> Carl Moreschi N4PY
> 58 Hogwood Rd
> Louisburg, NC 27549
> www.n4py.com
>
>
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>
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