[Antennas] Help on 5-BTV radials

[Cesar Gamez]

Gentlemen,

Thank you very much for all the info, it has been great feedback.
Hope to QSO with you soon, over the air, of course.

César.

1. Fere libenter homines id quod volunt credunt
2. Braccae tuae aperiuntur
;)

On 10/5/05, David W Sher <davew9lya at juno.com> wrote:
> Radials are a must.  They do not need to be straight, although I wouldn't
> fold the longest (80 or 40 M) radials completely back on themselves; you
> can make a right angle turn in the middle or so.
>
> Band width on 80 will be ca. 50-75 KHz for a 2:1 SWR.  You can get a good
> match on all bands with proper tuning; 40 will probably give you a
> 100-150 KHz bandwidth, the others should cover all the band.  This is
> based on measurements I made with my Butternut HF-6V and HF-9V antennas
> using a MFJ analyzer.  If you have modern all solid state finals, they
> will generally have foldback circuits which will protect them; the
> exception is Ten-Tec which uses very rugged finals which don't need it.
> Try to get an inexpensive tuner MFJ, etc. possibly a used one on eBay or
> at a hamfest.  If you have a tube final (2 x 6146, like Kenwood TS-830)
> you have nothing to worry about.
>
> Dave    W9LYA
> Sometimes a cigar is only a cigar.  S. Freud
>
> On Wed, 5 Oct 2005 00:41:22 -0500 Cesar Gamez <cgamezt at gmail.com> writes:
> > Hi,
> >  I'm new into ham radio, although done CB DX'ing some years ago
> > (70's &
> > 80's).
> > Hope somebody can give me some hints or help.
> > I've finally decided to put up a 5-BTV Hustler Vertical (resonator
> > tuned)
> > antenna on my base. I've just got the antenna and planning to set it
> > up next
> > weekend.
> > The antenna will lie on top of a 12 meter mast, sitting on my roof
> > (2
> > stories high).
> >  The antenna manual clearly specifies putting up radials (2 for each
> > band
> > minimum); but these are extremely long on the low freq. bands and
> > since I'm
> > in a pretty small footprint house in a residential area, I'm not
> > sure what
> > options I may have.
> >  My questions/ideas are:
> > 1. No radials: the mast is not planned to be grounded, I'm afraid of
> > severe
> > intereference at home and neighbors, even if using the ugly 1:1
> > balun
> > recommendation.
> > 2. Attach 10m band radials (shortest, about 8 feet long): I will be
> > using a
> > lot the antenna on 10m band locally, up to 100km distance radius
> > max.,
> > although I'm also interested in the DX use. I'm wondering if the 10m
> > will
> > help the multiples (20m, 40m and 80m bands) at all.
> > 3. What frequency on 80m should I tune the antenna (for a newbie,
> > like me?)
> > apparently the resonator has a tight tolerance on this.
> > 4. What is the max. recommended SWR for safe transmission without
> > burning
> > the equipment? I don't have a tuner, just a SWR meter and will
> > transmit max.
> > 100W.
> >  Thanks for your help.
> >  Regards, Cesar.
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