[Elecraft] KX1 Power Output

[KG5VU]

Hi,

I just finished building KX1 Serial Number 2879 which is the standard
20M/40M version.  It's a great little rig but, I have a few issues, one
major and two minor:

A)  On final testing I only had about 2.5W on 20M and 2.0W on 40M with power
supply at 13.8V.  I tried to compress the winding on L2, as suggested, but
this only degraded the output slightly (2.2W on 20M and 1.8W on 40M). 
Checked the components on the board against the schematic and everything
checked out OK.  Any ideas on what else I should try?  Any idea what RF
voltage levels I should see at each stage?  (I have several decent
oscilloscopes for testing if need be.)

B) The receiver is sensitive (I can hear 0.1 microvolt RF signal on 20 & 40)
but the audio level (particularly for weak signals) is pretty low unless I
advance the AF Gain control to full clockwise.  Is this normal?  Do I just
need to experiment with different sets of ear-buds?

C) The firmware on my KX1 is version 1.02.  The Menu on my unit is different
than the Manual.  It does not include SLO, SHI or CAL.  Instead there are
SIG, DDS and BFO.  Are support documents for revised version available?

For background, I had no difficulty during assembly.  The KX1 passed all
tests except the transmit power output.  

I did make one mistake during assembly however.  I mistakenly inserted a .1
microfarad capacitor at C30 instead of a .01 microfarad capacitor.  Since
everything seemed to be working, so I have not corrected this issue.  Think
this could be significant?

Thanks for any assistance you can provide.

Lee
KG5VU







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