aka propogation velocity "equals the reciprocal of the square root of the dielectric constant (relative permittivity), ?, of the material through which the signal passes" - wikipedia It's unique to the cable that you would use for the antenna construction. -- Lance McBride
________________________________ From: Virgil N. Salisbury <virg...@bellsouth.net> To: KRnet <kr...@mylist.net> Sent: Thursday, October 20, 2011 3:49 PM Subject: Re: KR> comm antenna 1/4 wave length Velocity Factor ? Virg On 10/20/2011 4:18 PM, Pete Klapp wrote: > > > Mark /Netters > > On your web site, you list the length of each leg of your dipole at 20.3". I > went to an online site that will calculate the needed length , > www.onlineconversion.com/frequency_wavelength.htm. Their conversion formula > gives a length range of 25.0" at 118 MHz to 22.0" at 134 MHz. The range of > frequencies in the Cleveland-Akron-Canton area run from 118 to 135 MHz. An > average / mid range would be about 126 MHz which would be a 1/4 wavelength > antenna of 23.4inches. How did you arrive at 20.3"? Did I make a mistake > somewhere? > > Has anyone else used another method or published table to get the antenna > length? > > Any info greatly appreciated. > > Thanks in advance, > > Pete Klapp, building KR-2S N729PK' > Canton, OH > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
