[Elecraft] T1 as remote tuner for KX2/KX3?

[Glen Torr]

Hi Wayne,

Sounds good, could you tell us the approximate offset of the feed point
from the centre, I would like to try this from home.

Many Thanks,

Glen VK1FB

On Saturday, September 16, 2017, Wayne Burdick <n6kr at elecraft.com> wrote:

> Steve,
>
> This should work. A couple of notes:
>
> 1. Yes, you could use one of the general-purpose I/O signals from the
> KXIO2 module to activate a T1 ATU. The associated menu entry could be
> assigned to one of the four programmable function buttons. There’s no way
> to do full T1 control from the KX2, however, as that requires generation of
> a serial data stream.
>
> 2. If you were to use good quality twin lead or ladder line, you could
> obtain equally good results just using the KX2’s internal ATU option
> (KXAT2). This is exactly how I operate at my own station. I use an Elecraft
> BL2 balun between the radio and the feedline. (Coax from the radio to the
> BL2 should be very short.) In my case the feedline is connected directly to
> an off-center-fed dipole about 90’ long. I can match this antenna on 80-6
> meters with the ATUs in any of our transceivers.
>
> 73,
> Wayne
> N6KR
>
>
> > On Sep 15, 2017, at 10:57 AM, Steve Sergeant <stevesgt at effable.com
> <javascript:;>> wrote:
> >
> > I am developing plans a hut-to-hut skit tour in Canada for next winter.
> > On this trip, I will want to operate my KX2 inside of metal-roofed
> > A-frame huts with a 60' feedline (RG-174, RG-58, or 300Ω twinlead?) to
> > some kind of wire antenna outside. I plan to operate SSB on 40 & 20
> > meters at a minimum, and 15 & 10m if possible; likely in adverse weather
> > conditions.
> >
> > I read the FAQ for the T1 on using it as a remote tuner, which says:
> >
> >> The T1 is intended for use near the operating position. But with a
> little effort it could be remoted, and its extremely small size would be
> beneficial for this purpose. First, the tuner must be placed in a
> weatherproof container if used outdoors. Second, controlling the tuner
> remotely requires a shielded control cable back to the operating position;
> this cable must supply, at minimum, a simple switch closure to wake up the
> tuner. It’s also possible to create your own band-data interface from the
> rig to the ATU, as explained in the T1 Owner’s Manual. Finally, you’ll need
> an SWR bridge at the operating position since you won’t be able to see the
> LEDs on the T1.
> >
> > I can see that the KX2 manual and the T1 manual give a lot of
> > information about control signals and such. But before I take the time
> > to try to engineer something or hack something, I'll ask the obvious
> > question:
> >
> > Has anybody out there done this?
> >
> > Follow-up questions to anybody who has:
> >
> > Can you describe your set-up?
> >
> > Have any of you found a way to use the KXIO2 and either the PFn or some
> > other feature to control the T1 from the KX2 through a separate
> > 3-conductor cable?
> >
> > Thanks and 73s. DE KC6ZKT
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