antenna
Why spend money make one, for $20 bucks , I will post it
It is simple and fast
DOCTOR/795
CB VERTICAL<1 hour to build>
« on: March 21, 2007, 02:25:31 PM »
--------------------------------------------------------------------------------
Here is a inexpensive vertical antenna..11 meters 27.115 <chnl 13> or make it for your favoite frequency for top notch transmitting and reception.
You need the following
2-10 foot lengths of 1/2 inch galvanized electrical conduit
2-stainless steel adjustable hose clamps
1- 5/8 inch wooden dowel
cut the conduit to the proper length..17. feet, 2 inches.aROUND 8FT 6 INCHES ON EACH SIDE.
formula 468 divided by f in MHZ
cut the conduit to a length of 17ft 2 inches
the wooden dowel is placed in the middle of your conduit pieces, if it is to tight sand it a bit to make it slide in make sure it is a snug fit. leave a gap of one inch between the two pieces of conduit, plug the top conduit so water doesnt get in use caulking <liquid nail works good>.use the adjustable hose clamps one on each conduit pole close to the end closeto the wooden dowel, one end of your coax goes to one side and the other goes to the other side<example center conductor to one side, ground braid to the other> and tighten them with the hose clamp.
Your swr will be around 1.3 to 1 if higher you might want to cut a small bit off the pole about 1.5 inches no more.
If you want a flat swr run it into a antenna tuner....
You can mount it anywhere <antenna>, vertical just use a u bolt mount it on a pole with a flat small board behind it so not to have the conduit pole touch the pole you are mounting it on.
Drill a hole in the top and have it just hang down from a tree branch or whatever, use good coax also not RAT SHACK stuff.
Hope this helps
Why spend money make one, for $20 bucks , I will post it
It is simple and fast
DOCTOR/795
CB VERTICAL<1 hour to build>
« on: March 21, 2007, 02:25:31 PM »
--------------------------------------------------------------------------------
Here is a inexpensive vertical antenna..11 meters 27.115 <chnl 13> or make it for your favoite frequency for top notch transmitting and reception.
You need the following
2-10 foot lengths of 1/2 inch galvanized electrical conduit
2-stainless steel adjustable hose clamps
1- 5/8 inch wooden dowel
cut the conduit to the proper length..17. feet, 2 inches.aROUND 8FT 6 INCHES ON EACH SIDE.
formula 468 divided by f in MHZ
cut the conduit to a length of 17ft 2 inches
the wooden dowel is placed in the middle of your conduit pieces, if it is to tight sand it a bit to make it slide in make sure it is a snug fit. leave a gap of one inch between the two pieces of conduit, plug the top conduit so water doesnt get in use caulking <liquid nail works good>.use the adjustable hose clamps one on each conduit pole close to the end closeto the wooden dowel, one end of your coax goes to one side and the other goes to the other side<example center conductor to one side, ground braid to the other> and tighten them with the hose clamp.
Your swr will be around 1.3 to 1 if higher you might want to cut a small bit off the pole about 1.5 inches no more.
If you want a flat swr run it into a antenna tuner....
You can mount it anywhere <antenna>, vertical just use a u bolt mount it on a pole with a flat small board behind it so not to have the conduit pole touch the pole you are mounting it on.
Drill a hole in the top and have it just hang down from a tree branch or whatever, use good coax also not RAT SHACK stuff.
Hope this helps