[Elecraft] KX1 Excessive Power Out

Ron D'Eau Claire rondec at easystreet.com
Thu Nov 18 13:41:11 EST 2004


John, isn't the OHR WM2 an in-line wattmeter? 

If so, do you have it connected to your KX1 antenna jack and to a good dummy
load? 

If your 24 foot wire antenna is connected to the WM2 it will *not* show the
correct power. It requires a 50-ohm non-reactive load to read power
accurately, and the 24 foot wire won't provide that.

Remember, the ATU inside the KX1 does a good job of converting the impedance
at the antenna jack to something close to 50 ohm non-reactive for the KX1
transmitter final, but it does nothing to change the SWR seen at the antenna
jack.

For the antenna analyzer, you might try MFJ at: http://tinyurl.com/3tgrr

Ron AC7AC 

-----Original Message-----
   A few weekends ago (sweepstakes weekend) I broke out my KX1 in the 
back yard to test and play with a few antennas I had been working on. 
(Tnx Mike, KK5F-Multi-Band Dipole) The ATU in the KX1 tuned the dipole 
beautifully with ~3.5-4 watts out. I then wanted to try the 24' piece of 
wire & counterpoise 12-16' combination as I haven't had any luck with 
this in the house or hotel rooms. The power out jumped up to 7 w as 
measured on my OHR WM-2 ! Knowing that's not possible, I'm befuddled. 
(is that a real word ?)
   ...
   One more question please. Does anyone have a link to a source were I 
might purchase a new MFJ-259 ant analyzer?...
John, KD5EJA, K1 #679 & KX-1 #479, K2 just around the corner




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