[Elecraft] Tuning 88' with KX1 autotuner?

Vic Rosenthal vic at rakefet.com
Mon Feb 21 01:06:07 EST 2005


Rick Dettinger wrote:

>  I could probably get the SWR
> on 40 meters down by changing the feed line length.  Of course, this would
> change the other bands.  

Easier than trimming (and maybe lengthening!) window line is the following: 
wrap a piece of aluminum foil about 1 foot (30 cm) wide around the ladder line. 
  Slide it around on the line until you find a place where all the bands are 
within matching range.  You can use more than one piece of foil if it helps.

You have made a capacitor whose effect on the impedance will be greater as you 
approach a voltage loop for a particular band.  I have done this successfully 
with a few hundred watts -- it probably would not be good for very QRO 
situations where the voltage loops can reach thousands of volts, but it should 
be safe for your KX1 :-)

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco



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