[TowerTalk] JK 402 versus CC XM-240

Jim Brown jim at audiosystemsgroup.com
Mon Feb 25 18:37:19 EST 2019


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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