[Elecraft] Visalia?

[Björn Ekelund]

I also enjoyed Ned's presentation.

There is however no need for new transceiver architectures to support FT8
DX mode.

The multi-transmission for FT8 Fox is created entirely through software by
combining
the baseband (audio) signal for each "transmitter" into a composite signal
fed to the
transceiver. Multi-reception is also purely a software affair.

Any modern radio, including the K3, supports this out of the box.

There is thus no need for multiple CAT interfaces.

Unless you want to run several bands simultaneously in one radio, of
course.
But that is no different from CW or any other mode.

73,

Björn SM7IUN

Den ons 17 apr. 2019 kl 09:41 skrev Erik Basilier <ebasilier at cox.net>:

> Tonight I attended a presentation by Ned Stearns AA7A on the Dxpedition
> version of FT8, and his extensive architectural design contributions to the
> Baker Island operation as well as his input to Joe Taylor's work on the
> protocol. While most of us don't need anything like the Baker station
> setup, the technical issues may nevertheless influence the direction and
> needs of the overall amateur gear market. With Elecraft's emphasis on
> supporting Dxpeditions I am sure that they look at such issues when
> considering new features for the K4 etc. Just a few points from the
> presentation that stuck in my mind:
> * The radio transmit frequency must be controlled by both the logger and
> the JT software, which work together but are separate. I have no personal
> experience with FT8, but I understand that (either with the current version
> or very soon) the DX hunter's transmit frequency will be dictated
> automatically on the fly by the DX starion, within a segment of the overall
> FT8 frequency window, such that the DX can overlap several FT8 qso's in
> time. This necessitates working around the basic "single sender" RS-232
> signalling scheme. Ways to do this were recently discussed here, and need
> not be repeated. My point: Elecraft might consider an attempt to
> standardize a new communication scheme for station control, such as to
> simplify the whole setup. Wiring a station is already disturbimgly
> complicated where multiple radios are involved.
> * The DX station would thus go beyond "SO2R" to something more like
> "SO4R". The FLEX approach already seems to have an edge in savings on
> mulit-radio hardware; a market-leading Elecraft architecture might optimize
> overall hardware cost when one operator is to use 2,3 or 4 virtual radios.
> Just hope it can be done so modularly that a small configuration is still
> affordable.
> * With the current interest in FT8, there seems to be pressure for the
> hardware to have capability to process a frequency segment that is larger
> than an SSB bandwidth.
> 73,
> Erik K7TV
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net>
> On Behalf Of Bill Frantz
> Sent: Monday, April 15, 2019 5:28 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Visalia?
>
> I didn't spend any time at the Flex booth, although their signas touted
> SmartSDR Version 3, so I expect they were also talking about multiFlex.
>
> While there may not be a lot of use for multiFlex in the normal DX chaser,
> perhaps except for those stations that really don't want US responses so
> transmit in the US phone band but listen in the US CW band, there are some
> interesting uses for DXpeditions.
>
> AA7JV was interested in running both CW and FT8 on 160M with one amplifier
> and transmit antenna. (He said setting up two stations was too much work,
> and you needed to be running both modes on those "magic nights" when 160
> was open.)
>
> He described an approach using a Flex in his talk at the Topband dinner
> and in his ""The RIB: Radio In a Box for DXpeditions" session.
>
> The idea of RIB is to put the box in the rare DX with a generator and
> antenna, and operate it from the boat off shore via UHF based internet,
> just visiting the DX to set up, service the generator, and tear down.
>
> 73 Bill AE6JV
>
>
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