John,
I'm not comparing stacked TH7s to the vert, but a TH7 at 25 ft to the
vert. IMO, a dipole would perform significantly better than a vertical
on 20-10.
73,
Barry
John Barber GW4SKA wrote:
> Given a choice between stacked TH7s and my verticals, maybe the beams
> would win!
>
> In the real world of many contesters, especially beginners, not many
> will have the space or the cash for big towers and beams. Verticals
> offer an alternative and cost next to nothing to build. The only
> commercial antenna that I have ever bought was a multi-band trapped
> vertical; very expensive with an 80M add-on. The first time I showed
> it some power the traps burnt out! It taught me to stick with single
> band quarter waves which will stand the abuse.
>
> It's surprising that nobody has mentioned the different requirements
> of antenna systems for contesting or DXing. Stacked monobanders would
> be great for beating the dx station pile-up; contesting is a different
> game. Big gain comes at the expense of coverage. That's why it is a
> little unfair to compare the performance of a beam, in one direction,
> with an omnidirectional antenna. Yes, I know that's how gain is
> measured and quoted, but it's not the whole story.
>
> Cheers,
>
> John GW4SKA.
>
>
>
> ----- Original Message ----- From: "Barry" <w2up3@verizon.net>
> To: "RTTY List" <rtty@contesting.com>
> Sent: Friday, March 27, 2009 7:58 PM
> Subject: Re: [RTTY] RTTY Contesting and Verticals
>
>
>> When I first set up my SO2R station, I had a pair of TH7s stacked. To
>> minimize potential interactions, I put up a ground-mounted Hygain
>> vertical about 200 ft from the tower. A dummy load worked better!
>>
>> I remember calling a KP4 on 15m and I got beat out by everyone, and I
>> was running high power. I couldn't get through until nobody else was
>> calling. Sooo, I put a third TH7 on the tower at 25 feet (yes, 25 feet)
>> fed separately from the stack. I did A/B comparisons vs. the vertical,
>> and the average difference was 6 S-units. After that experience, I
>> swore off (and at) verticals for the high bands.
>>
>> 73,
>> Barry W2UP
>>
>> Gedking@aol.com wrote:
>>> Stick that 2 el 40 at 120 ft and someplace in the world will always
>>> be open.
>>> " quote Jamie N8TT"
>>> ED K8OT
>>>
>>>
>>> In a message dated 3/27/2009 12:06:22 P.M. Eastern Daylight Time,
>>> ws7i@ewarg.org writes:
>>>
>>> Just thought I would add some comments on Verticals. I have used
>>> butternuts
>>> for some time in various configurations. I started with it roof
>>> mounted
>>> using the kit from butternut with about 10 additional radials.
>>>
>>> That worked the best BTW.
>>>
>>> Later I ground mounted it and had rather extensive radials as I
>>> installed
>>> them prior to putting in a lawn. I then tried phasing two of the
>>> butternuts
>>> but that never worked as well as a 2-element old Hygain yagi at 40
>>> feet on 40
>>> meters.
>>>
>>> The best butternut I have ever used was at Hal Blegens back in our
>>> eary
>>> contest days. It was mounted on top of his tower at just over 100
>>> feet. Hard to
>>> believe some of the stuff we did to try and get a single tower M/S
>>> station
>>> going.
>>>
>>> That was one band opening and closing antenna and it worked on all
>>> bands
>>> 10-80 quite well.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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>>
>> --
>>
>> Barry Kutner, W2UP Newtown, PA
>>
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--
Barry Kutner, W2UP Newtown, PA
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