HEllo Wayne
What´s your interest? Contest or DX?
If contest, you will do SOAB, Single operator monoband or Multi Single?
If I were you and I will do DX, I choose a tribander.
If I will do Contest and Single Operator entries, the tribander is OK to
start. If you will do Multi operator or SO2R, you will need more towers in
the future but if you buy the monobanders, you don´t need to buy new
antennas once you have the second tower
Just my 2 cents
73,
Jorge
CX6VM/CW5W
-----Mensaje original-----
De: TowerTalk [mailto:towertalk-bounces@contesting.com] En nombre de Gene
Smar
Enviado el: jueves, 18 de abril de 2013 22:04
Para: Jerry; towertalk@contesting.com
Asunto: Re: [TowerTalk] Please Help Me Decide on a Tribander or Monobanders
Gents:
Here, here for the Skyhawk. I've had mine up for 12 years, loads on 17
and 12, broadbanded.
73 de
Gene Smar AD3F
----- Original Message -----
From: "Jerry" <grf@npgcable.com>
To: <towertalk@contesting.com>
Sent: Thursday, April 18, 2013 7:47 PM
Subject: Re: [TowerTalk] Please Help Me Decide on a Tribander or Monobanders
I love my Skyhawk and you can load it with a tuner to work 17 & 12M.
Just finished my DXCC on those bands.
73
Jerry France
K7LY
Lake Havasu City, AZ
On 4/18/2013 4:01 PM, k2qmf@juno.com wrote:
> Go for the SkyHawk tribander.
> Much better than the Force 12 and less expensive too...
> Longer boom etc.
>
> 73,
> Ted K2QMF
>
> On Thu, 18 Apr 2013 17:24:31 -0500 Richard Thorne <rthorne@rthorne.net>
> writes:
>> I sure like my C31XR at 79' with a Delta 240 mounted 10' above it. I
>>
>> plan on changing out the 240 with a Delta 230/240 and lower it to
>> about
>> 7' above the C31xr then add a WARC 2/2 at the 10' level. That will
>> give
>> me a rotatable 10 through 40 solution.
>>
>> I also have a C3 tribander (going on 17 years old) mounted on a
>> rotatable swinging side gate at 40'.
>>
>> I really like the F12 antennas, instant band change and made in
>> America.
>>
>> Rich - N5ZC
>>
>>
>> On 4/18/2013 4:06 PM, Wayne Willenberg wrote:
>>> My 86 or 89 foot crank-up tower project seems to be progressing
>> through my
>>> County review boards. So now I am getting really excited for my
>> first
>>> tower.
>>>
>>> I am now in ham nirvana because I have to start making up my mind
>> on which
>>> antenna(s) to put on the 15? mast. Here is my first dilemma.
>> Should I put
>>> up a tribander (10, 15 and 20M) or 3 monobanders. My intuition
>> said there
>>> was no way a tribander with the same 20M boom length could beat 3
>>> monobanders having a 20M antenna with the same boom length.
>>>
>>> So, just as an exercise, I looked at Force 12 antennas. (I am
>> not
>>> endorsing Force 12 antennas, although they do seem to have a good
>>> reputation. I am also aware that the performance specs of
>> antenna
>>> manufacturers need to be taken with a grain of salt ?this is not
>> meant to
>>> be a criticism of Force 12.)
>>>
>>> I started with the Force 12 model C-31XR tribander. It has 14
>> elements on
>>> a boom length of 31?, a wind load of 10.7 sqft and published
>> figures of:
>>> 20M gain: 14.0dBi, a F/B of 20dB,
>>>
>>> 15M gain: 14.3dBi, a F/B of 22dB, and
>>>
>>> 10M gain: 15.6dBi, a F/B of 21dB. Published price: $2,970
>>>
>>> Then, I looked for monobanders from Force 12 that had a boom
>> length for the
>>> 20M monobander close to the C-31XR and a gain in the vicinity of
>> the of the
>>> tribander for each of the 3 bands. Here is what I found:
>>>
>>> EF-420 (20M with 4 elements) has a boom length of 30?, a gain of
>> 14.5Dbi,
>>> a F/B of 22dB, a wind load of 5.5 sqft, and a cost of $1,300.
>>>
>>> EF-415 (15M with 4 elements) has a boom length of 20?, a gain of
>> 14.6Dbi, a
>>> F/B of 22dB, a wind load of 2.8 sqft, and a cost of $869.
>>>
>>> EF-510 (10M with 5 elements) has a boom length of 18?, a gain of
>> 15.1dBi, a
>>> F/B of 23, a wind load of 2.5 sqft, and a cost of $799.
>>>
>>> The total wind load of the 3 monobanders is 10.8 sqft and a total
>> cost of
>>> $2,968.
>>>
>>> So, at first glance, the price and wind load of the tribander is
>>> practically the same as the sum of the 3 monobanders. There is no
>> more
>>> than an additional 0.5dB of gain (and 0.5 dB loss of gain on 10M)
>> with
>>> monobanders; a gain of 2dB F/B (and 2dB more F/B on 10M) for
>> monobanders.
>>> However, I am aware that there will be a degradation of the
>> performance of
>>> at least the middle monobander if I put 3 of them, in a Christmas
>> tree
>>> fashion, on a 15? mast. I haven?t been able to find a good
>> discussion of
>>> the amount of degradation?even the 22nd Edition of the Antenna
>> Book has
>>> only a few words to say about this. Please direct me to a
>> discussion of
>>> this topic if you know one. I may have to model these antennas on
>> EZNEC to
>>> see the impact of 3 antennas confined to a 15 foot mast.
>>>
>>> On the other hand, there has to be a compromise when 3 antennas
>> are mounted
>>> on a single boom.
>>>
>>> I would really appreciate your help in finding all of the specs I
>> should be
>>> looking at in making this decision. Any other comments that would
>> push me
>>> one way or the other would also be appreciated.
>>>
>>> Please help me with my first tower!
>>>
>>> 73, Wayne KK6BT
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
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>>> TowerTalk@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>
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