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Most of you may be familiar with the standard HF "Ugly
Balun" but this fairly simple project will show you my ideas for one that
is enclosed and out of the weather.
Materials list and description of
work.:
14" of 4" PVC. (all pvc is schedule 40 unless
otherwise noted)
2 - 4" PVC caps
1 - 1 1/4" PVC coupling 2 - PL-259 male
connectors
2 - SO-239 barrel or female
connectors.
18'-20' RG8 cable
#6 or #8 self-tapping screws
small scrap piece of 1/2"
pvc.
I began by turning the 4" caps
on a lathe to drill large holes in the ends for 1 1/4" pvc conduit.
Realizing not everyone has access to a lathe but a correct size
hole-saw will do the job.
Make the TOP cap hole a snug
fit for a 1 1/4" coupling. The bottom cap hole can be whatever you want to
use that will fit up a 1/2" CGB connector for the coax lead to
exit thru. But you want it large enough that the PL259 will go thru it. In
case you don't know what a CGB connector is..see photo
below.
 CGB CONNECTOR Glue the 4" PVC into the BOTTOM CAP. Slide the TOP Cap onto the 4" only far enough that you can get it off again and drill 3 holes equal-distance around the circumference. (Be sure to make one of them as a "match line" ) Now you are ready to coil up
the coax inside the tube. I wrapped the 20' length of coax around a short
piece of 2" pvc and taped it in place overnight. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
