[Elecraft] KX1 Power Output

[Phil Hystad]

> 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.


Wouldn’t that mean you made two mistakes.  Unless of course you had an extra
0.1 mF capacitor.  But, if you have exactly the right amount of parts, which is the
usual thing, then all misplaced part mistakes come in pairs.

73, phil, K7PEH



> On Jun 17, 2015, at 7:58 AM, KG5VU <mlhooper1 at comcast.net> wrote:
> 
> 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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