View Single Post
Old 20-Apr-2011, 9:04 PM   #2
GroundUrMast's Avatar
Join Date: Oct 2010
Location: Greater Seattle Area
Posts: 4,773
I would be reluctant to destroy a good factory built antenna. You can build a few inexpensive test / trial antennas using wood or plastic boom and wire elements. That would leave you a working antenna as a reference to compare performance against. You could then answer the question, "Will all of this WORK for me and will the effort increase the GAIN much for me?" for yourself. In theory, adding five more directors could yield 3 dB of forward gain... if you get it right.

450 ohm ladder line is a great stacking harness material, if you can find some. Open wire twin lead is easy to build, and Wikipedia has the formulas needed to calculate characteristic impedance.

Wavelength = Speed of light / Frequency

Channel 13's band center is 213 MHz, therefor 299792458 M/s divided by 213 MHz is about 1.4 Meters. Half of that is about 0.7 Meters.
If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)

(Please direct account activation inquiries to 'admin')

Last edited by GroundUrMast; 21-Apr-2011 at 4:54 AM.
GroundUrMast is offline   Reply With Quote