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Elecraft KX3 Owner's Manual now available

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Edward R Cole

Elecraft KX3 Owner's Manual now available

Wonderful. I can study-up on the new radio while I wait for its
delivery. I ordered about 8-hours after the announcement on Dec. 28
so hopefully not too far down the list. I have taken a chance that
it might arrive by April by offering to do a demo of the KX3 at our
local ham club meeting, Apr. 5th.

I did not see an image showing the back of the unit so wonder if
there any mounting holes for the optional mobile bracket?

I will be trying out several SDR programs with the radio using my
emu0202 soundcard and the KXUSB cable. I will perform measurements
of near spectrum two-tone tests for IMD and measure frequency with my
rubidium ref. freq. counter. I will set up a webpage to highlight
the unit and display these measurements.

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
======================================
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Edward R Cole

Re: Elecraft KX3 Owner's Manual now available

Following this thread with Lance, carefully. I'm not sure I will run
eme with my KX3 but will probably run WSJT on the 600m band. My 600m
transmitter uses a P&B dc relay for TR so need more delay. Can I not
use my K3USB cable and tap out the RTS line (DB9 pin7) to control the
GPIO line to accomplish PTT with sw control? Will use of the GPIO
line require special changes to the firmware to accomplish PTT?

Most soundcard sw utilize RTS for PTT, so this issue is not limited
to just WSJT.

73, Ed - KL7UW
------------------------------

Message: 14
Date: Mon, 05 Mar 2012 14:13:32 -0500
From: Don Wilhelm <[hidden email]>
Subject: Re: [Elecraft] Elecraft KX3 Owner's Manual now available
(*preliminary*)
To: [hidden email]
Cc: Elecraft Mailing List <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Lance,

You should not need another USB cable, but use the KXSER cable (and a
USB to serial adapter if needed) which will give you access to the RTS
and DTR pins of the serial port.
Yes, you will have to add the wires to the existing KXSER cable.

73,
Don W3FPR

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
======================================
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
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W7GJ, Lance

Re: Elecraft KX3 Owner's Manual now available

Hi Ed,

Yes, you can use your K3USB cable to gain access to the RTS line, but you would have
to select the optional KXSER cable (no charge exchange) to mate it to your KX3.
Apparently there is space inside that DB9 connector to mount a small resistor and
2N2222 to change the HIGH RTS line to a short that can be applied to the PTT ring in
the mic connector.

The GPIO approach will require a firmware change, and would require you to break out
the RTS line anyway, and then splice into another connector too....I am sure there
are others interested in doing this. I THINK this might be the easiest way, although
perhaps it would be possible to add another stereo jack next to the mic connector to
short for PTT....will have to see what the space issues look like inside the unit.
GL and VY 73, Lance

GL and VY 73, Lance

On 3/6/2012 9:02 AM, Edward R. Cole [via Elecraft] wrote:

> Following this thread with Lance, carefully. I'm not sure I will run
> eme with my KX3 but will probably run WSJT on the 600m band. My 600m
> transmitter uses a P&B dc relay for TR so need more delay. Can I not
> use my K3USB cable and tap out the RTS line (DB9 pin7) to control the
> GPIO line to accomplish PTT with sw control? Will use of the GPIO
> line require special changes to the firmware to accomplish PTT?
>
> Most soundcard sw utilize RTS for PTT, so this issue is not limited
> to just WSJT.
>
> 73, Ed - KL7UW
> ------------------------------
>
> Message: 14
> Date: Mon, 05 Mar 2012 14:13:32 -0500
> From: Don Wilhelm <[hidden email] </user/SendEmail.jtp?type=node&node=7347846&i=0>>
> Subject: Re: [Elecraft] Elecraft KX3 Owner's Manual now available
> (*preliminary*)
> To: [hidden email] </user/SendEmail.jtp?type=node&node=7347846&i=1>
> Cc: Elecraft Mailing List <[hidden email]
> </user/SendEmail.jtp?type=node&node=7347846&i=2>>
> Message-ID: <[hidden email] </user/SendEmail.jtp?type=node&node=7347846&i=3>>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Lance,
>
> You should not need another USB cable, but use the KXSER cable (and a
> USB to serial adapter if needed) which will give you access to the RTS
> and DTR pins of the serial port.
> Yes, you will have to add the wires to the existing KXSER cable.
>
> 73,
> Don W3FPR
>
>
>
>
> 73, Ed - KL7UW, WD2XSH/45
> ======================================
> BP40IQ 500 KHz - 10-GHz www.kl7uw.com
> EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
> DUBUS Magazine USA Rep [hidden email] </user/SendEmail.jtp?type=node&node=7347846&i=4>
> "Kits made by KL7UW" http://www.kl7uw.com/kits.htm
> ======================================
> ______________________________________________________________
> Elecraft mailing list
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--
Lance Collister, W7GJ
(ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ)
P.O. Box 73
Frenchtown, MT 59834-0073
USA
TEL: (406) 626-5728
QTH: DN27ub
URL: http://www.bigskyspaces.com/w7gj
Windows Messenger: [hidden email]
Skype: lanceW7GJ
2m DXCC #11/6m DXCC #815

Interested in 6m EME? Ask me about subscribing to the Magic Band EME
email group, or just fill in the request box at the bottom of my web
page (above)!

Don Wilhelm-4

Re: Elecraft KX3 Owner's Manual now available

In reply to this post by Edward R Cole

Ed,

For digital modes, you must provide audio input to the microphone
connector - just use a stereo plug and connect the audio to the tip -
the PTT is on the ring, so you only need 3 plugs, one for the headphone
jack and one for the microphone jack, and the other for the ACC1 (data)
jack.

It might prove useful to construct a variation the interface Skip Teller
KH6TY published in QST for July 2010. The "variation" is to add wires
from RXD and TXD (plus Signal Ground) to a 3.5mm stereo plug
(effectively adding your own version of the KX3SER cable) I believe it
provides exactly what is needed for the PTT Data mode operation - plug
it into a real serial port or the K3USB cable (or similar USB to serial
cable).

At least, that is how I would do it if I wanted everything to be in one
package.

73,
Don W3FPR

On 3/6/2012 4:01 AM, Edward R. Cole wrote:

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