Actual power out and the WM-2
Posted by
Vin Cortina on
Nov 22, 2005; 1:20pm
URL: http://elecraft.85.s1.nabble.com/Actual-power-out-and-the-WM-2-tp383971.html
Hi everyone,
I have been enjoying my K1-4 immensely for many months now, and am getting ready to build the KAT-1. But I decided to build my OHR WM-2 first, so as to get a good idea of how the antenna tuner is actually performing. Well, the meter went together on a Sunday afternoon/evening very nicely, but there is one thing I noticed.
My K1 goes from 100 mW to about 7.1 W according to the front panel display (of the K1). Now, when I look at the power out on the meter, I see good agreement with that from around say 2 watts to about 5 watts. But at the low and high end, the meter reads high. Approximately 300 mW when the radio says 100 mW, and about 6 watts when the radio says 5 watts. At the top end, the difference is even a little worse, approx 8.5 watts on the WM-2 when the K1 says 7 watts.
Yes, I definitely checked and re-checked the calibration of the meter according to the manufacturer's instructions. It occurred to me that maybe there is nothing really wrong, and that the K1 is just delivering more than it indicates at those levels. My years of training and experience in electronics tells me that that is probably not the case. The news is NEVER good.
I am certain many of you use the WM-2 with your K1's, so certainly someone must have some info on this. And the bad news is...?
Vin KR2F
K1 s/n: 1977
Vin
Mount Tremper, NY
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