I use KX3 for wsjt-x and JS8Call. I just connect the KX3 audio
(headphone jack) to the USB sound card. I use the waterfall to "hear"
what is going on and I like the quiet. I have not noticed hum. I have
a few snap on toroids on the audio lines in case. I use 12" audio
cables from the KX3 to the sound card and a 3' USB cable to the RPi. I
run 80 watts, often...
I use USB Sound card -
https://www.amazon.com/Sabrent-External-Adapter-Windows-AU-MMSA/dp/B00IRVQ0F8/ref=sr_1_3?keywords=Sabrent+USB+External+Stereo+Sound+Adapter&qid=1584190492&s=electronics&sr=1-3
not much different..
73, steve WB3LGC
On 8/7/19 2:02 PM, Michael Arnold wrote:
Michael,
I have good luck using my KX3 with a Raspberry Pi 3B+ and also the new Raspberry Pi 4 for both
JS8Call and WSJT-X. I use an inexpensive USB audio adapter/sound card and standard stereo
1/8" (3.5mm) male to male cables connected between the MIC and PHONES jacks on the KX3
and the sound card. To listen to the receive audio and monitor transmit audio, I split the
PHONES output using an 1/8-inch "Y cable" and feed one side to the sound card and
the other side to a powered speaker. For CAT control and PTT via CAT I use the standard
Elecraft USB serial cable from the ACC1 jack to a Raspberry Pi USB port.
In Settings on the Radio tab, under CAT Control, I choose the K3/KX3 or KX3 as
the rig and /dev/ttyUSB0 as the serial port. You'll also want to match the
radio serial port settings, typically, 38400, 8, 1 and none. On the Audio tab,
under Soundcard, I select Default:CARD=device for both Input and Output.
This method may result in some low-level 60 and 120 Hz audible ground loop hum
when AC powered, particularly with the powered speaker connected, but the
transmit signal, at least in my case, is clean. You can certainly use a
SignaLink or equivalent unit for better isolation and level control, but I've
found that the little USB audio adapter/sound card works fine and is a really
compact solution for portable operation!
Audio Adapter: https://www.amazon.com/gp/product/B01N905VOY
Audio Splitter: https://www.amazon.com/gp/product/B07431YDWM
73,
Mike W8NWA
-----Original Message-----
From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On
Behalf Of michaelheit--- via Elecraft
Sent: Tuesday, August 06, 2019 5:10 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KX3 and JS8CALL
I would like to use JS8CALL on my Raspberry Pi 3B+ , so do I need to use my
SignaLink as well? Has anyone on this group used a Pi3 with JS8CALL connected
to their KX3? Getting the KX3 connected to the Pi seems problematic; I have all
the connectors from Elecraft, the program is loaded on the Pi and seems to
operate properly, but doesn't seem to work with the KX3. I will need to get a
GPS HAT for the Pi and I'm considering the PI HAT from North West Radio that
includes a built in GPS with antenna. Thank you in advance for any input ...
de AD7VV
Michael Heit
North Pole, Alaska
AD7VV
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