HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Dec 10, 2001, 05:57 PM
Registered User
United States, PA, Canonsburg
Joined Sep 2001
185 Posts
Easy way to calculate antenna legth

Here's a link for antenna length calculations. Just put in the frequency for whatever channel you're using and click submit.
http://www.crompton.com/wa3dsp/hamradio/antcalc.html
Skysailor is offline Find More Posts by Skysailor
Reply With Quote
Sign up now
to remove ads between posts
Old Dec 10, 2001, 07:01 PM
Registered User
Walled Lake, MI, USA
Joined Feb 2000
11,182 Posts
And here's a link for exact frequency by channel number. But how important is it to have the antenna length tuned to the exact frequency of each channel, or does 39 inches work just fine for all of the 72mHz channels?

http://www.boeinghawks.org/club/freqchart.htm
Dave Hederich is offline Find More Posts by Dave Hederich
Reply With Quote
Old Dec 10, 2001, 07:10 PM
Registered User
Colorado Springs
Joined Mar 2001
75 Posts
The trailing wire antenna need only be a quarter wavelength long.

The wavelength at 72 MHz is approximately 4 meters.

A one-meter wire length is close enough. There are other effects that will act to alter the exact length, but for practical use it's adequate.
Ray Heaton is offline Find More Posts by Ray Heaton
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sanding Formica templates the easy way! mralston Power Systems 2 Feb 04, 2002 12:57 PM
True Flaps (is there a easy way) LJH Electric Plane Talk 13 Jan 08, 2002 08:03 PM
Easy Way to Route Cutie Antenna AirVenture Electric Plane Talk 4 Dec 08, 2001 03:31 PM
Easy way to break in a .61? KMKAZE Life, The Universe, and Politics 4 Nov 24, 2001 09:00 AM
Article An Easy Way to Calculate Wing Loadings Dennis Weatherly Electric Plane Talk 0 Jun 01, 1996 01:00 AM