Made a big difference here going from a 48' Delhi to a
72' Trylon tower ......
After 70' I would not think of any big gain until 100'
However that would be on real long haul stuff, 100' might
be to high for Europe at times...
You need more than 1 antenna but some of us are
stuck on city lots ( sigh )
Glenn VA3DX
Sent: Saturday, March 20, 2010 6:11 PM
Subject: Re: [CQ-Contest] Going from 50 to 70 ft.
> Hi Ralph,
>
> This is totally unsubstantiated with any personal "...blood, sweat, &
> tears"
> on my part, but I recall reading somewhere years & years ago (the "NCJ",
> maybe...?) that in order to experience any detectable/noticeable benefit
> in
> making your tower taller, you have to at least double the existing
> height...
>
> Increments of one, or two, sections just doesn't cut it, apparently...
>
> ...But I defer to the real-world experts reading this who have first-hand
> practical knowledge & experience in all this...!
>
> ~73~ de Eddy VE3CUI - VE3XZ
>
>
> ************************************
>
> --- Original Message -----
> From: "Ralph Bellas" <k9zo@hotmail.com>
> To: <cq-contest@contesting.com>
> Sent: Saturday, March 20, 2010 10:17 AM
> Subject: [CQ-Contest] Going from 50 to 70 ft.
>
>
>>
>> Folks,
>>
>>
>>
>> I'm beginning to frame up an article for the July/August NCJ "Contesting
> on a Budget" column. The topic will be to look at the benefits, costs,
> and
> considerations associated with raising a tower from 50 feet to 70 feet.
> Here are some of the thoughts I have:
>>
>>
>>
>> Benefits:
>>
>> You will hear and work dx which was previously unavailable. My estimate
> is that you will add an S unit.
>>
>> Occasionally get to run dx, especially during non-contest times.
>>
>> Be able to raise your lowband antennas.
>>
>> Add the possibility of mounting a tribander in a fixed direction to add
> contest flexibility.
>>
>> Possibly decrease RF in your shack and get rid of unresolved problems.
>>
>>
>>
>> Considerations:
>>
>> If you live in a hill, or have a good view, perhaps there will not be as
> great a benefit.
>>
>> Now you always must use proper safety equipment when climbing.
>>
>> Perhaps this is the time to replace coax, or go to a bigger antenna.
>>
>> It becomes more noticable
>>
>> Is a permit required?
>>
>> You will need to locate a gin pole for the last few sections.
>>
>> Could your signal be worse to certain areas?
>>
>>
>>
>> Costs:
>>
>> Probably you will be moving away from the simple house bracketed tower
>> and
> will have to add real anchors and guy wires.
>> You might have to relocate the tower and use two sets of guy wires.
>>
>> Two sections of tower, turnbuckles, clamps, rotor cable, coax, tape
>>
>>
>>
>>
>>
>> If you have been in the situation where you have raised your tower I'd
> love to hear from you and learn what you came across. Thanks.
>>
>>
>>
>> Ralph
>>
>> K9ZO
>>
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>
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