[Elecraft] [KX1] KX1 ATU problem

[Don Wilhelm]

Luke,

I believe 6.3 W is the maximum that is displayed by the KX1 (that often 
is the power level indicated when I am calibrating the tuner wattmeter 
for an SWR=2.0 with my 100 ohm dummy load attached.  So what 6.3 W 
indicated usually means is that you are trying to operate into an open 
circuit or a very high impedance.  Think about what changes may have 
occurred to your antenna on 30 meters since the last time you checked - 
are you using the same length feedline? (as one example of how a change 
can easily creep in).  I doubt it is the tuner.  You can check the tuner 
by tuning into a dummy load - try that and see if it works, and if so, 
take a critical look at your antenna.

73,
Don W3FPR


KD0FIN wrote:
> Well I figured out my problem (operator error). The ATU was in Calibrate mode
> and not Tune mode. So it is working now. However, when I try to tune 30m the
> power jumps straight to 6.3W (!) and doesn't fluctuate like the power
> reading does on other bands (40m jumps from around 4.6-5.1 watts with a 12v
> supply) Not to mention that the ATU gives me a somewhat poor SWR (1:2.8) on
> 30m even when it used to match relatively well (<1:2). I don't currently use
> 30m so it's not a big deal to me but something doesn't seem right...?
>
> Luke <>< KD0FIN
>
>
>
> KD0FIN wrote:
>   
>> So I just installed the KXB3080 and completed the 2 resistor "power mod"
>> but now my ATU doesn't seem to be working. It gives me power and SWR
>> reading when I use the "tune" function but I don't hear the relays
>> clicking and it isn't matching anything anymore. It might be unrelated but
>> also it seems to be very hard to find signals as well. I could hear a
>> couple faint ones on 80m but everything else seemed dead. The radio was
>> working as normally as I could tell after installing the KXB3080, and I
>> don't think I could have screwed up the the 2 resistors enough to cause
>> any problems?
>>
>>     
>
>   
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