[Elecraft] K3 / KPA500 / KAT500 Tuning
Cady, Fred
fcady at ece.montana.edu
Tue Nov 12 15:59:00 EST 2013
Jim. Be sure to set up the KAT500 Configuration:
Amplifier Key Interrupt Power = Optimize for KPA500 (not the default 30 w)
Amplifier Key Interrupt VSWR Threshold = ~2.5:1 (not the default 99:1)
I set the Autotune VSWR Threshold to 1.8:1 (or maybe that is the default)
In the K3 set PWR SET to Per Band and TUN PWR to nor.
Cheers,
73,
Fred KE7X
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Elecraft KX3 - Going for the summit"
www.ke7x.com or www.lulu.com
(Coming soon with explanations of all this: "The Elecraft KPA500 and KAT500 - the K-Line Dream Station")
Fred Cady
fcady at ieee dot org
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
> bounces at mailman.qth.net] On Behalf Of Buck - k4ia
> Sent: Tuesday, November 12, 2013 1:32 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 / KPA500 / KAT500 Tuning
>
> Is it possible that your antenna is tuned already? If it weren't, and
> the SWR were too high, you would not get 500 watts out of the amp. You
> would get a FAULT message and the whole thing would shut down.
>
> Buck
> k4ia
>
> On 11/12/2013 2:40 PM, Jim Bennett wrote:
> > Folks, sorry if this has been discussed on the reflector before, but
> I've looked through the archives and drew a blank. I know I saw it but
> try as I may, can't find any related posts.
> >
> > I just this week added a KPA500 and KAT500 to my K3 station.
> Documentation sez that the KAT500 tunes best when the K3 is set to 25
> watts of tune power. OK, got that set. But, what ideally should happen
> is that if the amp is in OPER mode and I press & hold the TUNE button
> on the K3, the amp should temporarily go to STBY mode until the tuner
> has finished doing it's thing. It doesn't - the amp fires out 450 - 500
> watts - not cool.
> >
> > Have I missed a setting somewhere that will make this happen, in case
> I forget to put the amp in standby mode, before I run a tune cycle?
> >
> > Tnx, Jim / W6JHB
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