[Elecraft] KX3 transmitting but not receiving on all bands

[Don Wilhelm]

Roger,

Simplify things - right now all I can say is that you have a problem 
with either your antenna, your amplifier, your external tuner or the 
KX3.  Any of those can be suspect.

Try the KX3 alone with your antenna, extra gear just complicates the 
picture.
Take the KXAT3 out of bypass and do an ATU TUNE on all bands - you 
should be able to receive if the band is not dead.
Then try a transmit on all bands.

Better yet, try the above tests into a dummy load (do an ATU TUNE into 
the dummy load first) and see if you can transmit.  That takes the 
complication of the antenna out of the picture.

Once you can transmit into the dummy load, then add the antenna and do 
an ATU TUNE on all bands with the antenna connected.  Observe the SWR 
that is produced at the tuner input - it should be low (1.5 or lower).

After that, try receive.  If all is well, then add back in the AT200 
first and bypass the internal tuner (that is a per band setting - do it 
on each band).
When you have good results with the external tuner, add the amplifier 
and see if there is any difference.

If adding the external tuner or the amplifier causes the receive to drop 
off, the problem is in the gear added and not the KX3.

73,
Don W3FPR

On 3/27/2013 7:56 PM, Roger Brisson wrote:
> New to ham.  I have a new KX3 with a RM italy 100 watt amp and AT200 Pro II auto tuner, 160 meter window dipole antenna.  I can transmit and receive on 20 meters, can transmit on 80 meters but not receive same on 40 meters.
> tuner shows it is tuning.  ATU is bypassed.  Went through the menu and everything is still set to factor.  Am I missing something?
>
> AB1SX
>