Isn't the a half wave high tower the general rule of thumb for a decent dx
angle?
After 60ft (1/2 wave on 20m) you need more guys with Rohn 25 and the work
difficulty starts increasing rapidly.
Sent from my iPhone
On Dec 1, 2011, at 12:31 AM, towertalk-request@contesting.com wrote:
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> Today's Topics:
>
> 1. Determine cost-effective tower height (Andreas Hofmann)
> 2. Re: Determine cost-effective tower height (Jim Lux)
> 3. Re: Determine cost-effective tower height (Dick Dievendorff)
> 4. Re: Determine cost-effective tower height (Gene Fuller)
> 5. Re: Determine cost-effective tower height (Dick Dievendorff)
> 6. FW: Determine cost-effective tower height (km5vi)
> 7. Re: Determine cost-effective tower height (Jim Lux)
> 8. top loaded vertical radial length (LY2KZ)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 1 Dec 2011 00:47:46 +0000
> From: Andreas Hofmann <Andreas.Hofmann@microsoft.com>
> Subject: [TowerTalk] Determine cost-effective tower height
> To: "towertalk@contesting.com" <towertalk@contesting.com>
> Message-ID:
>
> <A9B46A478518064C8E335B938C8768840EBE9F66@TK5EX14MBXC288.redmond.corp.microsoft.com>
>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi,
>
> I have decided I need a tower to get better antennas up in the air. Thinking
> about the SteppIR DB 18, 40m 2 el, 20 and up 3el. Now, my property slopes
> pretty much in every direction by 5 degrees. I need to determine a proper
> tower height without breaking the bank.
>
> I was told I should run a computer program to figure a good height of the
> yagi for my most important directions/DX locations. In fact a friend of mine
> did the same (on a similarly sloping property) and he found out that a 55
> foot tower would be similar to a 120 foot tower on a flat ground. Hence he
> put up a 55 foot crank up mast and it is rocking. He forgot the program he
> used.
>
> So, what tool can I use to find the optimal (not maximal) height of a tower
> that would work well here?
> Also, the tower would be setting on the side of the house with a metal roof
> (roof about 15 feet high), not sure if this would matter...
>
> Thanks
> Andreas
> KU7T
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 30 Nov 2011 16:59:54 -0800
> From: Jim Lux <jimlux@earthlink.net>
> Subject: Re: [TowerTalk] Determine cost-effective tower height
> To: towertalk@contesting.com
> Message-ID: <4ED6D18A.10405@earthlink.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 11/30/11 4:47 PM, Andreas Hofmann wrote:
>> Hi,
>>
>> I have decided I need a tower to get better antennas up in the air. Thinking
>> about the SteppIR DB 18, 40m 2 el, 20 and up 3el. Now, my property slopes
>> pretty much in every direction by 5 degrees. I need to determine a proper
>> tower height without breaking the bank.
>>
>> I was told I should run a computer program to figure a good height of the
>> yagi for my most important directions/DX locations. In fact a friend of
>> mine did the same (on a similarly sloping property) and he found out that a
>> 55 foot tower would be similar to a 120 foot tower on a flat ground. Hence
>> he put up a 55 foot crank up mast and it is rocking. He forgot the program
>> he used.
>>
>> So, what tool can I use to find the optimal (not maximal) height of a tower
>> that would work well here?
>> Also, the tower would be setting on the side of the house with a metal roof
>> (roof about 15 feet high), not sure if this would matter...
>>
>> Thanks
>> Andreas
>> KU7T
>>
>
> HFTA by Ward Silver which comes with the ARRL Antenna Book is what you
> want. You enter in the surrounding terrain (or extract it from DEM
> files, etc.) and it calculates the pattern.
>
> Only works for horizontally polarized antennas, by the way.
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 30 Nov 2011 17:25:50 -0800
> From: "Dick Dievendorff" <dieven@comcast.net>
> Subject: Re: [TowerTalk] Determine cost-effective tower height
> To: "'Jim Lux'" <jimlux@earthlink.net>, <towertalk@contesting.com>
> Message-ID: <001b01ccafc8$29967cf0$7cc376d0$@comcast.net>
> Content-Type: text/plain; charset="US-ASCII"
>
> I think HFTA is by Dean Straw, N6BV. In any case, it's the program you want
> for this. Ward edited the new Antenna Book, and included Dean's programs.
>
> Dick, K6KR
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Lux
> Sent: Wednesday, November 30, 2011 5:00 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Determine cost-effective tower height
>
> On 11/30/11 4:47 PM, Andreas Hofmann wrote:
>> Hi,
>>
>> I have decided I need a tower to get better antennas up in the air.
> Thinking about the SteppIR DB 18, 40m 2 el, 20 and up 3el. Now, my property
> slopes pretty much in every direction by 5 degrees. I need to determine a
> proper tower height without breaking the bank.
>>
>> I was told I should run a computer program to figure a good height of the
> yagi for my most important directions/DX locations. In fact a friend of
> mine did the same (on a similarly sloping property) and he found out that a
> 55 foot tower would be similar to a 120 foot tower on a flat ground. Hence
> he put up a 55 foot crank up mast and it is rocking. He forgot the program
> he used.
>>
>> So, what tool can I use to find the optimal (not maximal) height of a
> tower that would work well here?
>> Also, the tower would be setting on the side of the house with a metal
> roof (roof about 15 feet high), not sure if this would matter...
>>
>> Thanks
>> Andreas
>> KU7T
>>
>
> HFTA by Ward Silver which comes with the ARRL Antenna Book is what you want.
> You enter in the surrounding terrain (or extract it from DEM files, etc.)
> and it calculates the pattern.
>
> Only works for horizontally polarized antennas, by the way.
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 30 Nov 2011 21:09:30 -0500
> From: "Gene Fuller" <w2lu@rochester.rr.com>
> Subject: Re: [TowerTalk] Determine cost-effective tower height
> To: "Dick Dievendorff" <dieven@comcast.net>, "'Jim Lux'"
> <jimlux@earthlink.net>, <towertalk@contesting.com>
> Message-ID: <E2520ACDBCEE43858C2FEB22186E5240@FamilyRoom>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Agreed, HFTA is the way to go. ARRL Antenna Handbook ed 21 includes the
> software and instrustrutions you will need. A little hand held GPS will give
> you your tower location, and a fair bit of determination for the novice,
> will give you a great picture of what you have to work with.
> Gene / W2LU
>
>
>
>
> ----- Original Message -----
> From: "Dick Dievendorff" <dieven@comcast.net>
> To: "'Jim Lux'" <jimlux@earthlink.net>; <towertalk@contesting.com>
> Sent: Wednesday, November 30, 2011 8:25 PM
> Subject: Re: [TowerTalk] Determine cost-effective tower height
>
>
>> I think HFTA is by Dean Straw, N6BV. In any case, it's the program you
>> want
>> for this. Ward edited the new Antenna Book, and included Dean's programs.
>>
>> Dick, K6KR
>>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com
>> [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Lux
>> Sent: Wednesday, November 30, 2011 5:00 PM
>> To: towertalk@contesting.com
>> Subject: Re: [TowerTalk] Determine cost-effective tower height
>>
>> On 11/30/11 4:47 PM, Andreas Hofmann wrote:
>>> Hi,
>>>
>>> I have decided I need a tower to get better antennas up in the air.
>> Thinking about the SteppIR DB 18, 40m 2 el, 20 and up 3el. Now, my
>> property
>> slopes pretty much in every direction by 5 degrees. I need to determine a
>> proper tower height without breaking the bank.
>>>
>>> I was told I should run a computer program to figure a good height of the
>> yagi for my most important directions/DX locations. In fact a friend of
>> mine did the same (on a similarly sloping property) and he found out that
>> a
>> 55 foot tower would be similar to a 120 foot tower on a flat ground.
>> Hence
>> he put up a 55 foot crank up mast and it is rocking. He forgot the
>> program
>> he used.
>>>
>>> So, what tool can I use to find the optimal (not maximal) height of a
>> tower that would work well here?
>>> Also, the tower would be setting on the side of the house with a metal
>> roof (roof about 15 feet high), not sure if this would matter...
>>>
>>> Thanks
>>> Andreas
>>> KU7T
>>>
>>
>> HFTA by Ward Silver which comes with the ARRL Antenna Book is what you
>> want.
>> You enter in the surrounding terrain (or extract it from DEM files, etc.)
>> and it calculates the pattern.
>>
>> Only works for horizontally polarized antennas, by the way.
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 30 Nov 2011 18:19:50 -0800
> From: "Dick Dievendorff" <dieven@comcast.net>
> Subject: Re: [TowerTalk] Determine cost-effective tower height
> To: "'Gene Fuller'" <w2lu@rochester.rr.com>, "'Jim Lux'"
> <jimlux@earthlink.net>, <towertalk@contesting.com>
> Message-ID: <001801ccafcf$b4a4c4d0$1dee4e70$@comcast.net>
> Content-Type: text/plain; charset="us-ascii"
>
> Google Earth is another (free) tool that you can use to determine the
> latitude and longitude of your specific antenna location.
>
> Dick
>
>
> -----Original Message-----
> From: Gene Fuller [mailto:w2lu@rochester.rr.com]
> Sent: Wednesday, November 30, 2011 6:10 PM
> To: Dick Dievendorff; 'Jim Lux'; towertalk@contesting.com
> Subject: Re: [TowerTalk] Determine cost-effective tower height
>
> Agreed, HFTA is the way to go. ARRL Antenna Handbook ed 21 includes the
> software and instrustrutions you will need. A little hand held GPS will give
> you your tower location, and a fair bit of determination for the novice,
> will give you a great picture of what you have to work with.
> Gene / W2LU
>
>
>
>
> ----- Original Message -----
> From: "Dick Dievendorff" <dieven@comcast.net>
> To: "'Jim Lux'" <jimlux@earthlink.net>; <towertalk@contesting.com>
> Sent: Wednesday, November 30, 2011 8:25 PM
> Subject: Re: [TowerTalk] Determine cost-effective tower height
>
>
>> I think HFTA is by Dean Straw, N6BV. In any case, it's the program you
>> want
>> for this. Ward edited the new Antenna Book, and included Dean's programs.
>>
>> Dick, K6KR
>>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com
>> [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Lux
>> Sent: Wednesday, November 30, 2011 5:00 PM
>> To: towertalk@contesting.com
>> Subject: Re: [TowerTalk] Determine cost-effective tower height
>>
>> On 11/30/11 4:47 PM, Andreas Hofmann wrote:
>>> Hi,
>>>
>>> I have decided I need a tower to get better antennas up in the air.
>> Thinking about the SteppIR DB 18, 40m 2 el, 20 and up 3el. Now, my
>> property
>> slopes pretty much in every direction by 5 degrees. I need to determine a
>> proper tower height without breaking the bank.
>>>
>>> I was told I should run a computer program to figure a good height of the
>> yagi for my most important directions/DX locations. In fact a friend of
>> mine did the same (on a similarly sloping property) and he found out that
>> a
>> 55 foot tower would be similar to a 120 foot tower on a flat ground.
>> Hence
>> he put up a 55 foot crank up mast and it is rocking. He forgot the
>> program
>> he used.
>>>
>>> So, what tool can I use to find the optimal (not maximal) height of a
>> tower that would work well here?
>>> Also, the tower would be setting on the side of the house with a metal
>> roof (roof about 15 feet high), not sure if this would matter...
>>>
>>> Thanks
>>> Andreas
>>> KU7T
>>>
>>
>> HFTA by Ward Silver which comes with the ARRL Antenna Book is what you
>> want.
>> You enter in the surrounding terrain (or extract it from DEM files, etc.)
>> and it calculates the pattern.
>>
>> Only works for horizontally polarized antennas, by the way.
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>> _______________________________________________
>>
>>
>>
>> ___________
>
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