[CQ-Contest] Verticals and radials????
nss at mwt.net
Sat May 3 12:32:21 EDT 2014
What you can do since it is elevated, yes they ( The Radials ) do need
to be resonant just like a dipole. And since you can not do full sized
ones. You can just like a dipole add loading coils to them to be allowed
to have them shorter and still be resonant.
Remember being elevated you need them to be resonant for EVERY band of
operation also, and at least 4 per band. Goona get complicated. I see
LOTS of interactions between them all, trying to get all of them
resonant on all those bands at the same time. WOW.
The Original Rolling Ball Clock
On 5/3/2014 10:19 AM, Douglas Ruz wrote:
> Let me give more information.
> I am trying to build the antenna published in Sep/1981 QST. It is 44
> ft high plus a capacitance hat.
> It is 5/8 on 30m, 1/2 on 40m, 1/4 on 80m and 1/8 on 160m (the vertical
> In my case, IT IS NOT on ground. My backyard is about 15 by 15 ft, so
> i decide install the antenna in top of mast about 15 ft high, so,
> radials are elevated and running over the roof but only till 60 ft, so
> for 160m i need do "something" to get match.
> I think i must install independent radials for each band to get
> resonance cause i am using elevated resonant radials.
> Dave, K3ZJ and Bob WP2XX now you have more information.
> Thanks in advance
> 73...Doug, CO8DM - Member of T48K Team
> ----- Original Message ----- From: "David Siddall" <hhamwv at gmail.com>
> To: "CQ-Contest" <cq-contest at contesting.com>; "Douglas Ruz"
> <co8dm at frcuba.co.cu>
> Sent: Saturday, May 03, 2014 11:01 AM
> Subject: Re: [CQ-Contest] Verticals and radials????
> If laid on or under ground, as many as possible and lengths don't
> matter. If elevated, need to be resonant, but assume this is not your
> For excellent info on radials, see:
> 73, Dave K3ZJ
>> On May 3, 2014, at 9:55 AM, Mirko S57AD <miroslav.sibilja at amis.net>
>> Don't worry about quarterwave radials. Just put as many short ones as
>> can afford!
>> 73, Mirko, S57AD
>> 2014-05-03 5:04 GMT+02:00 Douglas Ruz <co8dm at frcuba.co.cu>:
>>> I am building a vertical antenna for low bands, 160, 80, 40 and 30m.
>>> Unfortunately my property is small, so, i can not install quarter wave
>>> radials for 160m. 60ft is maximun length.
>>> If somebody has experience or some information about short radials
>>> or some article published please let me know.
>>> Thanks !!!
>>> 73...Doug, CO8DM - Member of T48K Team
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