[Elecraft] Interface question.

[Gary Gregory]

Well seeing as you want the tune thru accessory connector, how about adding
me to that list too.

I have a Barrett auto-tune antenna which are very common here in VK. These
work a treat and the K3 would need to have the tune function reset after the
auto-tune antenna finds a match.

Although these are rated only for 125W, they are a great antenna and
extremely reliable. I have the specs and circuit diagrams available also.

I would than have the ability to use the K3 when mobile in the motor
home...:-)

Gary

On 13 April 2011 21:33, John K3TN <jpescatore at aol.com> wrote:

> I have the same combination: K3, ALS-600, MFJ-998. I also have a TS-850
> interfaced in, and the 850 interface to the 998 is much better: push the
> tune button on the 850, 850 goes to tune level, 998 goes to tune mode,
> click/whir, done. As you say, with the K3 have to use the 998 auto-tune
> mode, which doesn't always want to tune, so I often have to also hit the
> manual TUNE button on the 998, especially on bands like 10m where the tuner
> and the antenna are more finicky.
>
> So, I'll add my request for the K3 ACC TUNE signal in an attempt to move it
> up the list.
>
> 73, John K3TN
>
>
> Phil &amp; Debbie Salas wrote:
> >
> > As you've stated, so far the K3 doesn't have an external TUNE-KEY input.
> > This will have to be provided when the KAT500 is available - probably the
> > AUXBUS interface.  I have used a MFJ-998 with my K3 and ALS-600 for a
> > couple
> > of years now - and now a KPA500.  I leave the MFJ-998 in the full-auto
> > mode
> > and use the K3 TUNE function (TUNE power set for 15 watts) when I need
> the
> > tuner.  No problems at all.  The MFJ-998 interrupts the amp-key line
> > before
> > it tunes.  I've recently modified my MFJ-998 so it uses the amp-disable
> > feature of the KPA500 (info on my website) which is a much better way of
> > taking the KPA500 off-line prior to tuning.
> >
> > I WILL go with the KAT500 when it is available though.  I'm sure it will
> > integrate superbly with the K3 - just like the KPA500 does.
> >
> > Phil - AD5X
> >
> > "I have an MFJ-998. I wish I'd known better when I bought it - I
> > wouldn't buy another (for various reasons). I never found a good way
> > to integrate it with the K3... so the tune-up procedure involves using
> > the K3's "TUNE" function to produce a low-power signal (CONFIG:TUNE
> > PWR) and then invoking the "TUNE" function on the MFJ (it's configured
> > in "Semi-Automatic" mode). When the MFJ finds a match (or doesn't), I
> > tap "XMIT" on the K3 to end the "TUNE". There is a fully-automatic
> > mode, where the MFJ will initiate tuning when it detects SWR above a
> > configured threshold, but I had bad experiences with that in the past.
> >
> > If the K3 had a way to feed a signal into the ACC connector to trigger
> > the TUNE function, the MFJ could utilise that. The suggestion has been
> > made a few times, but it's probably not a high enough priority on
> > "Wayne's list".
> >
> > Aside from the KAT-500, it appears (from their website) that PalStar
> > are working on a new remote-able autotuner rated for 2500W. I'm sure
> > it'll cost a lot more than the MFJ, but... you know what they say ;)
> >
> > 73,
> >
> >     ~iain / N6ML"
> >
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*VK4FD - Motorhome Mobile
Elecraft Equipment
K3 #679, KPA-500 #018
Living the dream!!!*