I was discussing this with another ham on Friday, and he raised the question
of enforcement. While I hear questionable use now on 60 meters by some of
the primary users I am sure that amateur use will be closely monitored by
those primary users to see if we behave. Some of these folks are the same
ones that opposed our using this band in the first place. I plan on being
quite careful to say on he safe side.
Keith Lodahl
KB9NUM NNN0ACS NNN0GCE ONE
President, Rock River Radio Club
ARRL Official Emergency Station
ARRL Public Information Officer
ARRL Volunteer Examiner
920-387-4675
kb9num@charter.net
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of ROBERT STEPHENS
> Sent: Friday, May 16, 2003 10:33 PM
> To: tentec
> Subject: FW: Re: [TenTec] 60M
>
>
>
>
>
>
> TT group
>
> [I guess this thread is ok since we are talking about using TT rigs on
> 60 M <grin> ? ]
>
>
> Channelized,50 W ERP operation is sure going to confuse a lot of average
> hams. I'm average and I'm confused. Hopefully the TT reflector will figure
> this out for us. <big grin>
>
> I am not close to being an antenna expert but here is my 2 cents.
>
> The manufacturer of the Carolina Windom claims normal gain off
> the ends on
> 10 meters but they also claim vertical angle gain on the low
> angle, DX lobe
> for 80 meters.
>
> The Carolina Windom is not really a true classic windom. The "CW Windom"
> is an off center fed wire antenna with both a large horizontal
> and a small
> vertical element. The claim is that because of the vertical element's low
> vertical take off angle , there will be a larger low angle lobe
> from the "
> CW windom" as compared to a conventional low height dipole. The
> ads like to
> compare the "CW Win" with a conventional dipole at a "typical" low height
> of about 35 feet.
>
> Let's think about an 80 meter dipole at 35 feet. How much low angle
> vertical lobe will that antenna radiate ? Hardly any ? Now let's suppose
> that the manufacturer is telling us the truth and the " CW Win " really
> does exhibit a 10 dB gain in it's low angle lobe as compared to the,low
> angle lobe of a low conventional dipole. A 10 dB gain over "hardly any" is
> still a QRP signal! I'm not saying that the "CW Win" is a bad antenna. It
> just might grab more low band DX than a low dipole would,
> however, it will
> not have gain over an 80 meter dipole up 130 feet in the air.
>
> So - 60 meters. I think the FCC is saying we can have a signal comparable
> in strength to 50 watts sent to a 60 meter dipole up 1/2 wavelength (over
> 90 feet) over ground. A Carolina Windom would have no gain
> compared to a 60
> meter conventional dipole up 1/2 wave so there is nothing to be worried
> about. The guy who wants to put up a 60 meter Sterba Curtain in his back
> yard probably will be in a certain amount of trouble ;-)
>
>
> 73
> Bob KB1CIW
>
> [Original Message]
> From: Stuart Rohre <rohre@arlut.utexas.edu>
>
> dB of gain on 60m over a dipole! Beware of manufacturers claims, usually
> they are quoting for 10m and over isotropic source, and any
> other way they
>
> Even a 3 element beam only has 5 dB gain Max over a dipole, if that.
>
> <snip>
> 73, Stuart K5KVH
>
>
>
>
>
>
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