Dave G0WBX
On 30/07/18 20:12, elecraft-requ...@mailman.qth.net wrote:
From: DGDrath
To: elecraft@mailman.qth.net
Subject: [Elecraft] Decoding the Serial Output from a KX3
Message-ID: <5b5e65f6.9030...@rockisland.com>
Content-Type: text/plain; charset=IS
Hi Bob (and Mark),
My apologies, I think I may have taken us off the main topic. My
experience and requirement was fairly simple and I needed something
brainless to help make field day easy.
I have the acc2 cable from elecraft and then used a single phono cable to
transmit the ptt event from
You don't need to put the KPA500 into STANDBY via software. Just open the
KEY line to the KPA500 while the antenna is tuning, like the SteppIR tuning
relay interrupt option does, then close it when tuning is complete. These
connections can also be made with either the S-BOX or Y-BOX using the
Don’t use serial commands to tell the KPA to go to STBY for tune. Have your
controller break the PTT line for this (with a small relay) so that the KPA
immediately stops amplifying. Since you want your controller to issue commands
to the KX3, you can use a regular Y cable at the KPA500, but be
Thanks.
There is no automated screwdriver controller. I would make one that drives
the motor and sends serial commands to the KPA500 to go to standby, to the
KX3 to go into tune mode and respond back with the SWR and then I would
adjust the screwdriver antenna and re-enable the amp. All the
Just a quick reminder (for Bob), the KPA500 does not listen to Auxbus traffic
at all. Trying to send it Auxbus traffic thus would be fruitless.
Bob’s comment about connecting the KX3 and KPA500 using the serial connection
is a very good one. In fact when I was developing the KPA500's
I wasn't going to try to reverse engineer the Auxbus, just wondered if it
would handle the band changes if it was hooked up between the two.
Connecting the serial as you described is probably just as good. Tuning the
screwdriver antenna would still be custom as I am not using a purchased
automatic
If you set MENU:AUTOINF to ANT CTRL, no PC is needed to poll the radio; the
KX3 can distribute the frequency data to both the KPA500 XCVR port and to
the antenna controller as "FA ... ;" messages, so you don't need to try to
make the AUXBUS work. It may work, but in the KX3 documentation, the
I was trying to find out if the Auxbus works between the KX3 and KPA500.
That would be ACC2 IO = TRN CTRL and connect ACC2 tip to the KPA500 Auxbus.
The ACC2 Ring is already connected to the KPA500 PTT in and works fine.
There is no PC in the picture. My home station is completely PC controlled,
It looks like you would have to set MENU:ACC2 IO to TRN CTRL to enable
AUXBUS output on the KX3 GPIO pin. It's not clear from VE3IBW's post if
the KPA500 was automatically following the KX3 via AUXBUS, or if the XCVR
port of the KPA500 was being used instead.
The S-BOX enables easy connections
It does. I have used this setup for two field days. Pay attention to the
menu setup of acc2 and ptt on the kx3 if memory serves me correctly. From
my notes on field day setup:
If using an Elecraft kpa500, setup the kx3 so that the "pa key" is grounded
during ptt. That means lo=ptt on the kx3
That is a breakout box. Thanks for all the suggestions, but I am looking to
"roll my own" custom Arduino based interface for the KX3, KPA500 and
Scorpion Screwdriver antenna and was hoping to get anything someone has
already done to start from. I will shamelessly reuse what someone else has
done,
It sounds like N6TV's new Serial Box can provide this interfacing.
https://www.kkn.net/~n6tv/S-BOX/
73, Dennis NJ6G
On 7/30/2018 06:21, ANDY DURBIN wrote:
KX3 has the option to output aux bus on ACC2 "TRN CTRL (output; XV-series
transverter control using Elecraft auxBus prototcol)". Why
I have asked if this will work, but did not get any answers. I suppose I
could wire it up and see if it does.
73,
Mark
W7MLG
On Mon, Jul 30, 2018 at 6:21 AM, ANDY DURBIN wrote:
>
>
> KX3 has the option to output aux bus on ACC2 "TRN CTRL (output; XV-series
> transverter control using
KX3 has the option to output aux bus on ACC2 "TRN CTRL (output; XV-series
transverter control using Elecraft auxBus prototcol)". Why wouldn't you
connect this directly to the aux bus input pin of the KPA500. Isn't that what
it is for?
Not discouraging Arduino projects though as I am
To: DGDrath
Cc: Elecraft Mailing List
Subject: Re: [Elecraft] Decoding the Serial Output from a KX3
I am definitely interested. I had asked if connecting the Aux bus might be
useful but did not get any response. This would be a good solution. I am
using the KX3 and KPA500 in a mobile installation, get
I am definitely interested. I had asked if connecting the Aux bus might be
useful but did not get any response. This would be a good solution. I am
using the KX3 and KPA500 in a mobile installation, get about 220W which is
enough for now, but better integration would be nice. I have to manually
I have used an arduino to decode the serial output from a KX3 and
develop the band signals used to switch a KPA500 linear. The interface
has been working for many weeks. The interface may have utility with
other linear amplifiers as well.
If anyone is interested in details, let me know.
18 matches
Mail list logo
