[TenTec] Wish List for ORION-III

Carl Moreschi n4py3 at earthlink.net
Tue Apr 8 10:46:30 EDT 2014


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 at 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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