[Elecraft] KX1 S meter calibration

[Howard W. Ashcraft]

I believe the S9 "standard" is 50 millivolts, which is 50 microwatts at
50 ohms  [v**/50], which is -13 dbm [10*log(50uw/1mw)].  So, I would say
that +7 dbm would be your level.   As always, check the math and the
logic.  (I'm sure someone on the reflector will spot an error.)  

-----Original Message-----
From: Mike and Alicia Fanning [mailto:fanning at hiwaay.net] 
Sent: Wednesday, August 24, 2005 7:07 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KX1 S meter calibration

I'm trying to calibrate the S meter on my newly finished KX1 by cheating
and using a good signal generator at work during my lunch break.  The
KX1 manual suggests using another receiver tuned to a strong (S9+20 dB)
signal as the "reference standard", and then setting the KX1 S meter to
full scale (6
bars) using this same signal as a reference.  What level should I set my
sig gen to to generate an S9+20 dB signal level?  I realize it's a
relative thing, but I don't want to put too much signal into the radio
and burn up the front end.

Thanks!
Mike, K4GU





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