Yes, on tuning the radials on none mounted verticals. Look at the design information on any VHF ground plane 1/4 wave vertical.
Mel, K6KBE ________________________________ From: Matt Zilmer <mzil...@verizon.net> To: Terry Schieler <w...@swbell.net> Cc: 'Randy Cook' <k6cr...@gmail.com>; elecraft@mailman.qth.net Sent: Tuesday, July 2, 2013 8:17 AM Subject: Re: [Elecraft] OT- Radials for Vertical Antenna Actually, I don't think we're disagreeing. But if so, point(s) taken. I didn't mention that elevated radials shouldn't be used with a ground mounted vertical (I wouldn't try this either). Anyway, thanks for the info about having to tune them. That part I didn't know. 73, matt W6NIA On Tue, 02 Jul 2013 10:04:32 -0500, you wrote: >I'll have to go on record as disagreeing with Matt, W6NIA's statement below. Elevated radials *are* better than buried radials only *if* the vertical is not ground-mounted and the radials are tuned to resonance for each band. > >With ground-mounted verticals, the radials need not be tuned and do a better job if a large quantity of them are spread out on or below the ground. I would not use elevated radials with a ground-mounted vertical. > >Terry W0FM > >-----Original Message----- >From: Matt Zilmer [mailto:mzil...@verizon.net] >Sent: Monday, July 01, 2013 12:33 PM >To: Randy Cook >Cc: elecraft@mailman.qth.net >Subject: Re: [Elecraft] OT- Radials for Vertical Antenna > >Elevated radials are better than buried, but more radials are better than a >few or none. A good minimum number (for each band) would be 8. >Many studies on this have shown many more than 8 per band (like > 25) is much >better and, of course, much harder and expensive to field. > >I have a 33' vertical made of heavywall aluminum that has 7 radials for 40m >and another 7 for 15m. It works well enough, but generally I use it as an RX >ANT for the K3's sub rx. In my own case, the radials are buried for aesthetic >reasons. Plus, I don't want to need to duck down when mowing. There is no >ATU at the base of this vertical. > >When using this antenna for RMS Winmor (for Navy-Marine Corps MARS) just below >40m, it had no trouble handling all states west of the Mississippi with 150W >drive. > >I would say that you should do what you can to maximize the radial count, even >if it means changing your location plan. > >73, >matt W6NIA > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
