Bill,
The one downside of the F12 40, as opposed to the Cushcraft:
I used the Cushcraft very successfully on 12 and 17m. The F12 does not
load on those bands, I presume as a side effect of its design to avoid a
15m resonance, hence closer stacking to tribanders without interaction.
73,
Barry
P.S. No problems with the linear loading wires, so far.
Bill Parry wrote:
> Howdy Barry,
>
> I was using the EF version not the Magnum version of the F12 antenna.
> Possibly the Magnum has the problems fixed. I know that it is a larger
> antenna and costs quite a bit more.
>
> According to the F12 website the Magnum 2 element 40 is:
>
> Magnum 240N $1,189.00
> 2ele Yagi, 24' boom, 58' ele >5KW and weighs 85 lbs.
>
> According to my manual:
>
> Cush craft XM240 apex $700
> 2ele Yagi, 22' boom, 43.75' ele >2KW and weighs 55 lbs.
>
>
> I had a great deal of trouble with the phasing lines breaking on the F12
> antenna, as well as those little stand-off connectors out on the elements. I
> got a call from the company admitting that these stand off connectors were
> faulty, and they replaced them. Small consolation since the antenna was
> stacked above another antenna at 100 feet. The phasing lines broke on three
> separate occasions!
>
> The XM240 has several modifications that were made after the original
> 40-2CD. I believe that some of the moods were the ones recommended in an
> article in QST. The band width of my XM240 is about 240 KHz which is far
> more than necessary for my needs. I did have difficulties with interaction
> between both of these antennas and my other antennas. If I remember
> correctly, when F12 came out with the Magnum version of the 40 M antenna,
> one of the advantages it was supposed to have is that it didn't interfere
> with other nearby antennas. That would certainly be a plus for the antenna.
>
> Glad your antenna works well,
>
> Bill, W5VX
>
> -----Original Message-----
> From: Barry [mailto:w2up3@verizon.net]
> Sent: Wednesday, October 17, 2007 9:02 AM
> To: Bill Parry
> Cc: 'Greg Clark'; towertalk@contesting.com
> Subject: Re: [TowerTalk] Shorty 40
>
> I"ve had a F12 Magnum 240 up a few months now, replacing a Cushcraft
> 40-2CD that damaged by lightning. I think the F12 is a significantly
> better performer and has a bit wider bandwidth, as well.
> Barry W2UP
>
> Bill Parry wrote:
>
>> The XM240 is a fine antenna. I had the F12 40 and it is NOT a fine antenna
>> (physically). I don't know about the other two.
>>
>> Bill, W5VX
>>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com
>> [mailto:towertalk-bounces@contesting.com] On Behalf Of Greg Clark
>> Sent: Wednesday, October 17, 2007 7:30 AM
>> To: towertalk@contesting.com
>> Subject: [TowerTalk] Shorty 40
>>
>> Folks,
>>
>> I'm in the process of rebuilding my station and am in need of a 2 ele 40m
>> yagi. In the past I had an old 40-2CD by Cushcraft on the tower.
>>
>> In shopping around I have looked at:
>>
>> XM240
>> Force 12 (new and old linear loading designs)
>> Hy-Gain
>> M2
>>
>> The Optibeam looks nice but is out of my budget.
>>
>> -The XM240's are kinda hard to find - all on backorder at most of the
>>
> major
>
>> shops in the US as of the end of last week. Not sure if this has anything
>> to do with the company recently being purchased??
>>
>> -Force 12 has a 4-6 week lead time (even with that quote it's "iffy" as to
>> when it will arrive).
>>
>> -M2 - I couldn't find a direct link on their site for a 2 ele version any
>> longer, so I don't even know if they are still available as I have not
>> called the factory yet. Anyone know if they still make a 2 ele 40m yagi?
>>
>
>
>>
>> -As for Hy-Gain - well - I just don't see many of these yagis - are they
>> that poor of a performer? We had one at the WM5G multi years ago - I
>>
> don't
>
>> remember much about it. I can get one of these in a reasonable amount of
>> time but don't want to be wasting my money and time.
>>
>> Greg
>> K9IG
>>
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