http://elecraft.85.s1.nabble.com/Not-sure-my-KX1-ATU-is-working-correctly-tp7144358p7145127.html
solder connection between that connector and the board ground. Make
the solder actually flows instead of just being "pasted on". If there
> Hi Don,
> I followed your instructions and did the following:
> I removed my ATU from the KX1 and put the jumper in place.
> With my shack tuner, using my Icom I tuned it for a perfectly flat SWR
> on 20 meters.
> I moved the coax from my Icom to my KX1.
> I peaked the 20a and 20b trimmers
> I moved the coax back to my icom and tuned the shack tuner for 40 meters
> I moved the coax back to my KX1 and peaked the 40 trimmer
> I removed the jumper in the KX1 and re-installed the ATU and set it to
> CAL.
> I connected the KX1 to my dummy load (Bird ERI-003F 150 watt 50 ohm
> dummy load)
> I changed bands on the KX1 to 20m
> I proceeded to adjust trimmer capacitor C9.
> I was able to get the voltage to .000 (it had a range from about 2.9
> volts and bottomed out at .000).
> The power meter was only showing about 2.8 watts and the SWR showed 1.0
> I connected my icom back up and re-tuned the antenna for 20m
> I moved the coax from my icom back to my kx1.
> With the KX1 still in cal, I pressed tune. Now the power was showing
> about 1.9 watts and 9.9 (infinite) SWR.
> I moved the from the KX1 to my icom and tuned the antenna for 40m.
> I changed bands on the KX1 to 40m
> I moved the antenna from my icom back to the kx1 and made sure it was
> stil on CAL. I pressed tune and it was showing 2.9 watts out and 1.0 swr.
> These are the results. I'm not sure if I was supposed to see it dip to
> .000 volts or not.
> It definitely appears the issue is something with 20m. I wish I had a
> wattmeter for QRP to see what the power/swr was doing without the ATU
> on 20m.
> Also, I have a 13.8 volt supply connected, 3 watts sounds a bit low?
> 73,
> James KB2FCV
>
>
> -----Original Message-----
> From: Don Wilhelm <
[hidden email] <mailto:
[hidden email]>>
> To: james1787 <
[hidden email] <mailto:
[hidden email]>>
> Cc: elecraft <
[hidden email] <mailto:
[hidden email]>>
> Sent: Mon, Jan 2, 2012 1:30 pm
> Subject: Re: [Elecraft] Not sure my KX1 ATU is working correctly
>
>
>
>
> James,
>
>
>
> I am not sure from your prblem description whether you have a KX1
>
> receiver problem or a KXAT1 problem or some sort of setup problem with
>
> your shack tuner.
>
>
>
> First thing to do is to peak the KX1 receiver front end, and you remove
>
> the tuner (put the jumper in) and connect it to a signal generator or to
>
> an antenna that presents close to a 50 ohm load.
>
>
>
> Do the following things in order:
>
> You have a shack tuner, so I suggest you set it for a 1:1 SWR - you can
>
> do that with another transmitter or with an antenna analyzer - set it up
>
> first for 20 meters.
>
>
>
> Once you have a 50 ohm signal source connected to the KX1 input, peak
>
> the 20A and 20B trimmers for the maximum output from the KX1. Re-tune
>
> your shack tuner to 40 meters, then connect the KX1 and peak the 40
>
> meter trimmer - it must be done in that band order, reversing it will
>
> only lead to frustration.
>
>
>
> After having done that, you can remove the jumper and install the KXAT1
>
> and set ATU to CAL
>
> First connect a good 50 ohm dummy load and balance (null) the wattmeter
>
> with the trimmer capacitor. If you can obtain a good low millivolts
>
> reading, that is good - above .010 volts is bad, below .003 volts may be
>
> the best you can do.
>
>
>
> With the KXAT1 still in CAL, again tune your shack tuner to 50 ohms on
>
> 20 - now you can compare the KX1 receive with you other receiver. Then
>
> set the ATU menu to "tun" and it should tune to less than 1.2 and you
>
> should still be able to hear signals at the same level as before
>
>
>
> Switch your shack tuner to 40 meters and do the same as you did on 20.
>
>
>
> After doing that, if you still have a problem, ask again.
>
>
>
> On 1/2/2012 12:34 PM,
[hidden email] wrote:
>
> > Hi Folks,
>
> > I just finished putting together my KX1 with the ATU. I am having a problem
>
> with it on 20m when using it through my shack tuner (viking matchbox to a dipole
>
> up 60-70 ft). As the manual states, I place the tuner into CAL to bypass the
>
> tuner. The problem is that it seems kind of quiet. I listen to a loud S-9 signal
>
> on my IC-746pro and it is much quieter on the KX1. For kick's I placed it in the
>
> tuner-on setting and hit tune. It tuned for a seconds and now it's louder. I
>
> tapped the key and it went back to being quiet.
>
> > ?
>
> > I didn't seem to notice this on 40m last night and made a few QSO's.
>
> > ?
>
> > Just wondering where I might check to see that everything is ok. I wonder if
>
> C9 on the ATU is set correctly? With my DMM I was able to get the voltage down
>
> to almost zero.
>
> > ?
>
> > Thanks& 73,
>
> >
>
>
>
>