[Elecraft] K2 power output measurement accuracy?

[Darwin, Keith]

Thanks Don,

So with my basic K2, I should get agreement between the K2's setting and
its output when driving my 50 ohm dummy load.  I'll check it that way
and report back.

I never completed the RF probe with the K2 (didn't need it).  I assume
it simply converts RF AC voltage into DC voltage (probably RMS) so you
can measure it with a DVM, right?  So at 10 watts into a dummy load, I
should see 22.4 volts?  Does the diode drop some voltage so I'll
actually see 21.7?

There is so much I don't know about this stuff since rig since it went
together with no problems and worked fine the first time.  It didn't
give much opportunity to do any trouble shooting.  Gee Darn :-)

- Keith KD1E -

-----Original Message-----
From: Don Wilhelm [mailto:w3fpr at earthlink.net] 

The basic K2 power ouput indication is very accurate when operating into
a 50 ohm non-reactive load.  If it is driving anything other than that
load, the indication will be inaccurate - the basic K2 does not have a
wattmeter, it does have an RF Probe type detector which reports the RF
Voltage to the microprocessor and the 'power' is computed based on the
assumption that the load is 50 ohms.