[Elecraft] Narrow Digital Modes ??

[Lyle Johnson]

I am uncertain why the OP claims the KX2 is not usable on JT65.  One of the
KX2 field testers operated the radio on that mode without issues and
reported the same in an eham review of the KX2.

In fact, we paid great attention to frequency stability in the KX2 design,
applying lessons learned from the KX3.

The KX2 Tx power is more limited than in the KX3.  But JT65 is a weak
signal mode :-)

73,

Lyle KK7P

On Tue, May 24, 2016 at 9:46 AM, Edward R Cole <kl7uw at acsalaska.net> wrote:

> I reviewed the KX2 FAQ before replying and actually one can connect an
> external computer to the KX2 and audio can be connected via headphone and
> ext mic connectors and PTT via the computer connection, so I would guess
> that freq stability might be the reason.
>
> One cannot connect to external SDR programs as IQ baseband access is not
> provided like the KX3 (BTW that is not provided in the K3, ether but WSJT10
> and probably JT65HF work off ordinary speaker audio into a soundcard).
>
> I can run either WSJT10 using my K3 LINE OUT or MAP65 using a LP-Pan (SDR)
> on the first IF.  LP-Pan provides IQ baseband audio for computer based SDR
> programs.
>
> Someone needs to run a test of freq.stability on the KX2 running about 3w
> output in CW, holding key-down for 50-seconds followed by Rx for 70-seconds
> to simulate JT65 heating and thus frequency stress.  IF 28-MHz holds under
> 20-Hz drift over at least ten minutes than it is compatible for JT65; if
> not then that may be the issue.
>
> Let me say my KX3's features suit my use(s) of the radio better.  I like
> having 6m & 2M internal to the radio.  Recently had opportunity to use the
> KX3-2M as base radio for my weekly 2m SSB Net and its receiving ability
> with 214-foot of coax cable from my four yagi eme array worked surprisingly
> well (normally I use tower mounted preamps).
>
> 73, Ed - KL7UW
>
> Date: Tue, 24 May 2016 08:57:27 -0400
> From: Dan - VA3MA <va3ma at me.com>
> To: Elecraft <elecraft at mailman.qth.net>
> Subject: [Elecraft] Narrow Digital Modes ??
> Message-ID: <36339378-65DB-4DE0-A268-E2F52F442EA3 at me.com>
> Content-Type: text/plain; charset=us-ascii
>
> Could Elecraft explain why the KX2 design doesn't allow operating say JT65
> out of the box?
> What prohibits manufacturing the rig to do the narrow digital modes?
> Would be helpful to know
> Thanks
> Dan VA3MA
>
>
>
> 73, Ed - KL7UW
> http://www.kl7uw.com
>     "Kits made by KL7UW"
> Dubus Mag business:
>     dubususa at gmail.com
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to kk7p4dsp at gmail.com
>