Fellow towertalkians, regarding Jims questions;
Am I right in assuming that the F12 yagis are designed for 20, 15 and 10
mtrs and 17/12 mtrs only work because there is a load at the end of the
coax and you need to use a tuner to operate there..
Performance on those bands seems mediocre at the most. Kinda like stating
that a 20 mtr monobander also works on 17 and 12 mtrs.. of course it does.
Or am I missing something ?
73/Peter SM2CEW
www.qsl.net/sm2cew
At 07:27 2002-03-06 , you wrote:
>Hi all,
>
>Getting ready to replace the old HyGain TH3 with something better. Have
>decided on the F12 C4 series with the 2 el 40 as this seems to best fit
>the constraints of my 33 x 120 ft city lot. (Gotta get something on 40
>better than the present droopy dipole.) The antenna will be at about 50
>ft. Rotor and mast will be upgraded as required. Main interest is
>contesting. Trying to decide between the XL and the SXL.
>
> From looking at the specs I don't see any significant difference in
>gain or F/B between the two models.
>
>The XL has better 2:1 SWR bandwidth on 10 (1.5 MHz vs 1.1 MHz) but do I
>care? i.e. How often am I going to be above 29.1 in a contest? Also,
>the most power I run in a contest is 150W and the MkV can put out 200W
>so I should be able to get 150W into the antenna at frequencies higher
>than 28.1 even if the SWR is getting up past 3:1.
>
>On 12m the XL max SWR is about 3.2:1 vs about 4:1 for the SXL but it
>isn't a contest band so that isn't much of an issue.
>
>SWR specs are identical for the other bands.
>
>The SXL is smaller, lighter and cheaper than the XL.
>
> From the above it would seem that the appropriate choice for me is the SXL.
>
>I would be interested in any comments as to the validity of my choice.
> i.e. do you know something that I don't about these antennas which
>might swing the choice the other way?
>
>TIA for your help.
>
>73 de Jim Smith VE7FO
>
>
>
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