[TowerTalk] Mosley Beam Questions

[Lane Zeitler]

The two element Lightning Bolt quad covers five bands and is still under
$300 and only weighs around 25 pounds. The Tennadyne antennas are built like
battleships and the advertised prices include shipping. I would first go for
the quad followed by the log. If you do NOT need WARC then I would go with
the X-7. It is a flamethrower.

Lane
Ku7i


----- Original Message -----
From: <K7LXC@aol.com>
To: <emoore@windemullerelectric.com>; <towertalk@contesting.com>
Sent: Tuesday, December 05, 2000 9:58 AM
Subject: Re: [TowerTalk] Mosley Beam Questions


> In a message dated 12/5/00 7:12:25 AM Pacific Standard Time,
> emoore@windemullerelectric.com writes:
>
> > I'm looking into upgrading my station in the spring and realizing
Mosley's
> >  long lead time, I will order it know to have in plenty of time for a
spring
> >  installation.  I currently use a TH-3JR. and really have to be careful
with
> >  my power output.  I have a SB-220 amplifier.
> >
> >  I am undecided between the TA-53-M and the CL-33-M-WARC.
> >
> >  My questions to the group are:
> >
> >  1. Which is more important, forward gain, or front to back ratio?
>
>     What kind of operating are you planning? Contestors typically want
more
> gain and would be interested in working stations off the back whereas
DX'ers
> are typically interested in F/B since they're usually trying to hear thru
a
> pileup and want as much other signal rejection as possible.
> >
> >  2.  Should I sacrifice gain on 17M and 12M for better front to back
ratio?
> >
>     ANYTHING you do to a Yagi antenna is a compromise. Your design
parameters
> include forward gain, F/B, bandwidth, SWR, feedpoint impedance, etc. so if
> you change one thing, it affects everything else. Mosley antennas are not
> known for their clean (or discernible) patterns so in this case it
probably
> doesn't make any difference.
>
> >  3.  Is there another 5 band beam I should consider other than Mosley?
>
>     Uh...ANY other antenna IMO. Pete suggested an LPDA; they're becoming
> pretty popular. You didn't mention how big of an antenna you'd consider;
> another choice would be a TH11 as is the Cushcraft X-7 (smaller than the
> X-9). For the best bang-per-buck (and small size since your antennas of
> choice have 14' and 15' booms), I'd go with the Force 12 C-3 in a NY
minute.
> It'll run circles around most Mosleys (even the PRO antennas) and the
> *compromise* performance on 12 and 17M means that it still works
reasonably
> well on those bands.
> >
> >  4.  Any other thoughts.
>
>     Generally gain is a function of boomlength so you need a bigger boom
to
> realize much in the way of performance gain over a 15-foot or so long
boom.
> You won't see hardly any difference between the little Mosleys and the
TH3;
> the only thing you get is some WARC band coverage - hardly worth the work
and
> investment IMO.
> >
> >  5.  I am aware in the long lead time and are not concerned, as I am
also
> >  familiar with the Mosley quality.
> >
>     Are you familiar with their performance? Try our tribander comparison
> report for an on-the-air analysis of a dozen tribanders including 3
Mosleys.
> Available from Champion Radio Products.
>
> >  I will be mounting this at around 35' and can accommodate around 15sq.
ft.
> I
> >  should minimize the number of elements to keep the XYL happy, but are
open
> >  to any suggestions!
> >
>     If you've got that much capacity, skip the little antennas and go
> directly to the TH11, LPDA or something similar. Even a CC stack of an A-3
> w/40M kit and a A-3WS with 30M kit will give you better performance than
the
> Mosleys and total 40-10M coverage.
>
> Cheers & GL,   Steve     K7LXC
> www.championradio.com
> Tower Tech
>
>
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