Hans,
I would suggest you try re-peaking the K2 bandpass filters using
Transmit. Set the power to 2 watts and adjust the 10 meter inductors
for maximum output (L12 and L13) using TUNE, then switch to 12 meters
and adjust C44 and C46 for maximum output. That should produce the best
setting for both transmit and receive.
If connecting the antenna when tuned to those bands results in an
increase in noise in the receiver, you have all the sensitivity you can
use. You should be using real signals (but weak ones) to compare
receiver sensitivity - if you are comparing on the basis of the
'loudness' of the noise heard, that can create a false impression. What
is important is the signal that stands above the atmospheric noise.
73,
Don W3FPR
On 11/5/2014 4:41 PM, Hans J Rasmusen OZ7BQ wrote:
My K2 (ser 04069) appears to lack a bit of receiver sensitivity on 12 and 10
Meters. I can hear stations and the static noise when the antenna is connected,
only weaker than on other bands.
I have full TX power output on both bands, so the filters appears to be tuned
correctly.I only noticed the apparent lower sensitivity on 12 and 10 Meters
after adding a KX3 to the station.My plan is to rig the K2 up as second
receiver for split operation on a special RX antenna using the K2 Rcvr Antenna
module.
If the apparent lower sensitivity on 12 and 10 Meters is normal, so be it.
However, I wonder if any one has made the same observations and found a
solution.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
