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Old March 29th 07, 11:00 PM posted to sci.electronics.design,sci.electronics.basics,rec.radio.amateur.antenna
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Default VSWR doesn't matter? But how about "mismatch loss"?


"Cecil Moore" wrote in message
...
Charles Schuler wrote:
Now, since "lossless" is an abstraction and all materials have voltage
and current limits, just make this easy on yourself and always strive for
a VSWR of 2:1 or less. It simply works better and is more reliable.


But renders many all-HF-band dipoles useless. :-) I regularly
run up to an 18:1 SWR on my 450 ohm ladder-line. Owen's
transmission line calculator says I'm losing about 0.8 dB
in 100' of line under those conditions on 40m. IMO, it's
a small price to pay for all-HF-band operation.


How many Ham transmitters have a balanced output?

How are you feeding a balanced line?

If you are using an antenna tuner with unbalanced in (50 ohms) and balanced
out (variable impedance), you should be OK in most situations.




 
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