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Old November 21st 09, 12:53 AM posted to rec.radio.amateur.antenna,alt.internet.wireless
JIMMIE JIMMIE is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 625
Default Matching on the MFJ-1800

On Nov 13, 8:28*am, "amdx" wrote:
*Hi All,
*My original thread seems to have died, still wondering how the folded loop
is matched to 50 ohms. (probably isn't? cheap, but works?)
*I've added a dimensional drawing and some more pics.
If more info is needed let me know.

Here is a drawing and some more pics.http://i395.photobucket.com/albums/p...Jruledcoax.jpg
* Hope I covered everything,
* * * * * * * * * * * * * * * * *Mike


The folded dipole is going to have about 4 times the impedance of a
plain old dipole.(POD) In this case if you used a POD with your yagi
antenna the feedpoint impedance would be in the neighborhood of 10
ohms
with a folded dipole it will be more like 40. Not a bad match for 50
ohm coax

Jimmie