[TowerTalk] JK 402 versus CC XM-240

[Grant Saviers]

All true, Jim.

I think Ken of JK really knows his stuff re antenna design both RF and 
mechanical.  I trust his NEC4 patterns and plots.  I have confirmed with 
NEC4 the design of the JK 80m 2L beam which I own. The 80m 2L is awesome 
mechanically.  At 157' not much gets missed.

As well, re W6NL's design of the 40m Moxon being discussed.  I built/own 
two.  Also NEC4 verified.  K3LR and 8P5A use them.  The JK Moxon looks 
like a close derivative.

Grant KZ1W

On 2/25/2019 15:37 PM, Jim Brown wrote:
> On 2/25/2019 2:02 PM, Tony Brock-Fisher via TowerTalk wrote:
>> just take a look at the SWR curves of each antenna, and you will see 
>> that the JK402T is much more broadbanded. 
> 
> CAUTION -- SWR is NOT a measure of antenna performance. GAIN and the 
> overall pattern ARE. SWR tells us nothing about either. An unterminated 
> 1,000 ft spool of RG58 will read 1.1:1 on 40M. :)
> 
> I'm not suggesting that the JK antenna isn't better, but SWR ONLY tells 
> us about SWR, and whether matching is needed to keep the power amp or 
> output stage happy enough that it will drive it to full power. That's 
> certainly a good thing, but it doesn't tell us how well the antenna works.
> 
> 73, Jim K9YC
> 
> 
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