Mobile antennas

greeneyes965 · #1 (**permalink**) 10-07-2009, 03:43 AM

I'm trying to make a vhf antenna for my radio,can anyone help me

ka3jjz · #2 (**permalink**) 10-07-2009, 05:25 AM

There are so many kinds of mobile antennas - a very simple one would be to get the 1/4 wave Larsen sells (I think...) and cut the whip down for the frequency range you're interested in with a simple formula 234/f(mhz) where f(mhz) is the frequency in Mhz.

Are you looking for something specific - a 5/8 wave, collinear - what? 73 Mike

greeneyes965 · #3 (**permalink**) 10-07-2009, 10:51 PM

How do you make one with a coil?

prcguy · #4 (**permalink**) 10-08-2009, 02:32 AM

Why do you want a coil in your antenna?
prcguy

Quote:

Originally Posted by greeneyes965

How do you make one with a coil?

gewecke · #5 (**permalink**) 10-08-2009, 03:21 AM

Quote:

Originally Posted by greeneyes965

How do you make one with a coil?

A coil is only needed to electrically reduce the length of an antenna. You can make a simple antenna without a coil.
N9ZAS

poppafred · #6 (**permalink**) 10-08-2009, 06:48 AM

Quote:

Originally Posted by greeneyes965

I'm trying to make a vhf antenna for my radio,can anyone help me

I went to Radio Shack and bought a cheap mag mount cell phone antenna with a BNC connector. It cost less that $20 and doesn't blow off the roof. Can't hear stuff 100 miles away but when you're mobile, you want local stuff anyway. I can listen to VHF and UHF plus 800mHz without a problem.