[Antennas] SWR dipole

2002年9月06日 07:30:03 -0500

Yesterday I put up a 20M half wave vertical dipole with a coax choke
balun at the bottom end of the shield side. . It's 32' long and seems
to work ok. The bottom end is off the ground about 15'. Good sig reports
and it's 1.7:1 or less across the entire band. I don't seem to
have any rf on the feed line, no way to tell. 
I wanted to use ferrite beads as a means of decoupling the shield (ala
W2DU) from the bottom end of the dipole element. But I had some rg-8x on
hand and there is no 73 series bead size to fit the OD of the coax, so I
used the coil balun... . I may make another using rg-58 and fb-73-2401
beads The idea was to have a bottom fed dipole, thats easy to roll
up and store, and to use as a sloper or vertical, depending on tree
size.
Here's my question. 
Does anyone know of a good way to test for rf on the exterior of the
feed line? A sensitive field strength meter perhaps? 
Thanks for any suggestions, and 73�s, Terry, WA�ITP 
--- StripMime Report -- processed MIME parts ---
multipart/alternative
 text/plain (text body -- kept)
 text/html
The reason this message is shown is because the post was in HTML
or had an attachment. Attachments are not allowed.
Please post in Plain-Text only.---