HF WIRE ANTENNAS MADE IN GERMANY
HF WIRE ANTENNASMADE  IN  GERMANY

NEWS FLASH  New QRP RIG:

"ALT-512"

Photo: LZ1JY

AVAILABLE NOW!

SKY-SDR

Photo:  DJ0IP

(No longer available)

Matching Unit

In addition to providing a good match to the antenna, the Model 404-UL's Matching Unit has been optimized to match the antenna's specific common-mode-current characteristics, assuring problem-free installations, even in less than optimum locations.

 

HOW DID WE DO THIS ?

 

We began with extensive field measurements on several OCFD antennas, charting their common-mode-current problems, by band.

 

Using knowledge gleaned from K9YC's excellent paper on RF chokes, entitled "RFI-Ham", plus the charts on G3TXQ's web site, we optimized the Matching Unit's choking impedance to match the Model 404-UL's specific common-mode-current trouble area.


Druckversion Druckversion | Sitemap
{{custom_footer}}