[Towertalk] Re: F12 C4XL or C4SXL Which to buy?

[Jan Erik Holm]

If itīs honest  figures do Force 12 say how they did measure them?
If not the value of these figures must be considered small.
Now, on stacked antennas in Scandinavia, this statement mainly
applies to Finland, there are quite few stacked antennas for HF
in Sweden and just about none in Norway and Denmark, why
itīs like this Iīm too lazy to explain right now.

73, Jim SM2EKM
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Pete Smith wrote:

>At 10:46 PM 3/6/02 +0000, SM2CEW wrote:
>
>>Hi Pete!
>>
>>Well, I just find it strange that this advertising is not questioned a bit
>>more. Any manufacturer could claim that their antennas work on any band if
>>we accept F12's way of reasoning. The buyer should be better informed of
>>what is really going on in my point of view. 
>>
>
>Hi Peter --
>
>I may not have given them enough credit.  Here's what Force 12 claims for
>the C-3, and I have always found their specifications to be honest:
>
> 
>BAND			GAIN		NET GAIN	F/B	SWR
>14.000-14.350 	12.6dBi 	4.6dBd 	15dB 	<1.6:1 
>18.068-18.168 	10.3 		2.3 		7 	~2.8:1       
>21.000-21.450 	12.8 		4.8 		17 	<2:1 (425 kHz)       
>24.890-24.990 	10.1 		2.1 		11 	<3.2:1       
>28.000-29.700 	12.5 		4.4 		18 	1.5 MHz  
>
>So you see, there is less gain and F/B on 12 and 17 meters.  Moreover,
>because the feed system is set for the other three bands, the SWR is not
>attractive there.  Still, I have no trouble feeding my stack of C-3Es on 12
>and 17 with my SB-220 or the tuners in either of my radios.  I think it is
>fair for Force 12 to advertise this, because ordinary tribanders do not
>have even this modest level of gain and directivity on 12 and 17, and the
>traps in the driven element might not be happy with significant power on 12
>or 17.
>
>By the way, I've been interested to notice how many stations in Scandinavia
>seem to have either tribander or monobander stacks, compred to the rest of
>Europe.  I'm curious as to why this should be so.
>
>
>73, Pete N4ZR
>
>Check out the World HF
>Contest Station Database at
>www.pvrc.org
>
>
>
>
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