[Elecraft] Follow up on KX1 Field Ops
Ron D'Eau Claire
ron at cobi.biz
Thu Aug 22 17:55:39 EDT 2013
Note that the KX1 is not a 5-watt rig.
The specifications say 3-4 watts output with an external 12V supply and
1.5-2W when running from a fresh internal battery pack delivering 9V.
Of course, the difference between 4 and 5 watts is only 20% - just about the
typical error in good RF wattmeters including the "professional" meters used
to measure transmitter output. So it's not surprising that some measurements
might suggest 5 watts, even when used with a good dummy load. On the other
hand, don't be dismayed with a lower reading.
At those power levels a quite good power meter may be assembled using a
diode to rectify the RF across a dummy load and measure the d-c with a
well-calibrated DMM. A little Ohm's law calculation will yield the RF power.
The Elecraft DL1 is a great example of such a dummy load/rectifier combo.
I have had a great many QSO's over the years, including occasional DX,
running 1 to 2 watts with my homebrew rigs, a Heathkit HW-8 and then the
KX1, into a variety of antennas. Some were random wires strung up where
convenient and, when I had the space and time, a doublet up in the clear.
73, Ron AC7AC
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