Gotta watch that vid..I tried a version of that on youtube but they all made so techy and i couldnt grasp it..Ill try with that bid.....
My rig expert has that smith chart option in it now that i think of it..
A thread that will never die
Discussion in 'CB Radio Forum' started by Gadfly, Jan 18, 2019.
Page 12 of 17
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LC circuits 101
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yeah, thats good but there is one measurement used to determine the condition of the coax which is the most important test and no aa can do.
Timin770 Thanks this. -
Which is??
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It is a bit more complicated to figure out how well the coax is working, so I won't post the details. -
18ft of coax is commonly used because it was the length from the dashboard of a 4wheeler to the metal bumper where they mounted that big antenna with the tennis ball and had it strapped down to the roof in the 70s.
18foot.
It's a D A M N SCAM
4ft works if it's all you need.
Good post -
It makes it seem very technical, or very important to those who want to pretend they are much more knowledgable than the rest of us to spend time fiddling with velocity factor and just the "right" length of coax to get that O-n-n-n-n-n-n-e eensy extra watt out when that one eeensy little bit of RF will be undetectable on the other end. ---And that's fine if one want to do that. But, IMHO, and my experience shows me its a waste of time.
I recently (and finally after the WX improved) got my 80-10M HF system in my pickup. From the bumper into the cab where the radio is remoted behind the back seat, its about....oh, 6-7 feet to the radio. The coax length is not related to ANYTHING. I'm making contacts on 75 and 40 Meters on a regular basis. We don't need no "stinkin'" 60, or 30, or 14 feet of coax. It works fine on ALL bands with 6 feet!jammer910Z Thanks this. -
On the other hand it's not a big challenge to do 30 seconds of math, cut 3 feet off and refit the connector. 5 minutes tops
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So, since length doesn’t much matter, the only REAL criterion is coax and connector quality.
A few feet more than necessary — and AMPHENOL connectors — majes for those of us who order online an easy job.
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