THE KL7JR 5 BAND PIPE VERTICAL
A simple, cheap and easy to build 33 feet long vertical antenna
that works DX on 20 - 10 meters including WARC BANDS.
That's 20, 17, 15, 12 and 10 meters!
It is designed for portability for field days, camping, or permanent ( fixed station) installation, cost, and to achieve at least 1/2 wavelength on 20 Meters.
You will not believe it's performance until you try it!
1 ea 10 foot 1 inch EMT conduit
1 ea 10 foot 3/4 inch EMT conduit
1 ea 10 foot 1/2 inch EMT conduit
1 ea 102 inch CB whip
3 each hose clamps
Assorted bolts, nuts from junk box
Insulating support for base of antenna (3 inch)
Assorted # 12 wire or plumbers tape for radial ring
4 to 6 or more radials + - 16 feet long from wire for each radial
NOTES and BUILDING TIPS: (See drawing above)
Slide 1/2 inch EMT pipe into 3/4 inch EMT pipe 18 inches
Slide 1 inch pipe 24 inches OVER end of 3/4 inch pipe and bolt or pin 2 places
Drill and bolt or pin above sections together. (Assure that you have good electrical and mechanical connections between all sections)
Hose clamp the CB whip on the outside surface of the 1/2 inch EMT section assuring that it overlaps 6 inches with the 1/2 EMT for a total length of all 3 sections of 33 feet top to bottom
Use some form of insulator on the base (1 inch section) to isolate the antenna from ground.
Build your ground and radial ring from about 12 inches of wire and lay around the base of the antenna.
Atttach the radials, as many as you can lay out.
Attach the center conductor of your coax to the base of the antenna and the shield to the ground ring where radials are attached.
Raise antenna (See Antenna Raiser Project) and support....you may need to guy it with rope if windy.
Connect to tuner and rig, adjust tuner for lowest
Just to let you
know, I put together the 5 band pipe vertical using the cb whip
antenna and it works great.
Update From Jeff,
This is a quick way
to add 80 meters to the 5 band pipe vertical that is half wave on 20
meters designed by KL7JR.
73's K5ARE from New Albany, MS