[Elecraft] K2/100 and KAT100 odd behavior

Sun Jan 25 21:10:00 2004

I use my K2/100 with the 100w atu to drive my Acom 1k amp on 160m and I can 
assure you that my K2 does not behave in this manner. I generally have to 
set the drive level to around 30w to stay within the Irish 400w limit out 
of the amp, I have no problems whatsoever as I move around the band with 
the k2 varying the output power.

the Acom 1k terminates the rig into a 50 Ohm load so the input impedance 
with this amp is fairly constant

I have never had any problems whatsoever with the k2 driving this amp

At 04:06 25/01/2004, Floyd Sense wrote:
>Jack - I don't think you really mean that.  Please go back and read what I
>wrote.  I duplicated the problem INTO A DUMMY LOAD.   To summarize, I set
>the K2 power control for 50 watts and the output was indeed 50 watts at
>1805.  I moved to 1845 and the output was 120 watts for many seconds.  By
>any stretch of the imagination, outside the Elecraft world, that just isn't
>considered normal operation!
>
>73, Floyd - K8AC
>
> >
> > Sounds like it is working normally. Antennas tend to tune rather
> > tightly on 160m since a small change in frequency results in a large
> > change in reactance. Your antenna is showing that change between 1805
> > and 1845 KHz. So when you move the KAT up to the higher frequency, it
> > will try to retune the antenna (in AUTO mode) when it sees RF.
> > When the SWR is something other than 1:1, the power reading will not be
> > accurate. So after the KAT retuned the load, you again saw a correct
> > reading.
> >
> > Sounds normal to me...
> >
> > - Jack Brindle, WA4FIB
> > ------------------------------------------------------------------------
> > ---------------------
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