[Towertalk] Burning ?'s

[Mark Beckwith]

I used a 2 element shorty 40M yagi (forget if it was a HyGain or a
Cushcraft) to make 1000 QSOs (largely NA and EU) on 15M from HC8U in 1989 in
the CQWW CW contest.  If I'd have had a real 15M antenna I should have made
close to twice that.

I put 12M and 17M energy into my model of my 4-element 20M Yagi (on 44 foot
boom) and there is a small amount of gain - front to back of about 2 db on
24.9 MHz and a small amount of "back-to-front" on 18 MHz.  I agree this
answer probably depends more on your exact antenna, but all 20M parasitics
whether directors or reflectors are probably reflectors on 17M.

I put 15M energy into a 2-el 40 model and the pattern is best described as a
butterfly, with roughly a 10db front-to-back ratio.  The largest lobes off
the front were not straight ahead, but at more like plus and minus 30
degrees.  Nothing off the back was within 10db of the bog lobes off the
front.  Like I said above, it worked at least.

Software: AO

Mark, N5OT

----- Original Message -----
From: "Tom Martin" <tmartin@chartermi.net>
To: <towertalk@contesting.com>
Sent: Saturday, May 25, 2002 1:02 PM
Subject: [Towertalk] Burning ?'s


> After a few hours trying to copy 40 wpm in the Worked All States (!!!)
> contest, I decided to ask the experts on this forum a few questions.
>
> 1.  Does my 2 element 40 meter beam act as a two element 15 meter beam
> when I use it on 15, or more as a dipole.  I have front to back and side
> rejection when I rotate it, but is there any gain?
>
> 2.  I have been using my 5 element 20 monobander through a tuner for 12
> and 17 meters because a windom at 40 feet doesn't work very well at all
> on these bands.  Same question.  Any gain or just a dipole with a lot of
> aluminum around it?  Sometimes it works best aiming 180 degrees away
> from the station and I don't think it's long path.  However, I worked
> R1MVI this a.m. at 30 degrees and a few days ago VK9KV at 170 degrees
> for the best received signal.
>
> 3. Does anyone north of Chicago hear any signals on 10 meters except
> Central America and the Caribbean?
>
> 73, Tom W8JWN
>
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