The lower you go in frequency, the more "metal" you need to make an "impact" in resonant length.
Ever try snipping an inch or two off a 160m wire dipole? Doesn't make a difference until you take a couple feet off. Kb0wlf > -----Original Message----- > From: [email protected] [mailto:Repeater- > [email protected]] On Behalf Of hitekgearhead > Sent: Wednesday, June 30, 2010 9:58 PM > To: [email protected] > Subject: [Repeater-Builder] lowband HT antennas > > I know I am revisiting this again but I could use some clarification. > > It has been stated before that the Motorola low band helical antennas > have a useful bandwidth of about 1MHz. > > I was just wondering why that was the case, say in comparison to HT > antennas in other bands. For instance, (and correct me if I am wrong) > the mid UHF (430-470MHz) radios often all use the same 6" 1/4 wave > whip. > > What am I missing? I know that the first type of antenna is loaded and > the other is a 1/4 wave whip, but beyond that I don't understand the > fundamental differences that would allow one a wider bandwidth over the > other. Please pardon my antenna theory ignorance > > > Also, in relation to that, what use would be a 99 channel MT1000 unless > one either programmed the frequencies on quite a narrow spread, or > carried multiple antennas? > > Thanks in advance, > > Albert > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: > 06/30/10 06:36:00
