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BBi explains antennas. (put on your high boots)
- Thread starter 543_Dallas
- Start date
DC voltage drop per foot...
Ever put 12V into 100' of wire and get a lot less at the other end ? I'm sure you have.
Ac losses in db/ft @ frequency...
If there is sufficient loss in a lengthy coax run it's nearly the same but,
it works in both directions!
So if 20% of your energy never makes it to the antenna then 20% of the reflected energy never makes it back to the VSWR meter at the radio !
It's just numbers .
Ever put 12V into 100' of wire and get a lot less at the other end ? I'm sure you have.
Ac losses in db/ft @ frequency...
If there is sufficient loss in a lengthy coax run it's nearly the same but,
it works in both directions!
So if 20% of your energy never makes it to the antenna then 20% of the reflected energy never makes it back to the VSWR meter at the radio !
It's just numbers .
For anyone still interested ...
I went here,
https://en.wikibooks.org/wiki/Communication_Systems/Antennas
Found Hertzian Antennas...
If you look at the diagrams and then his
Then his ....
Hence the problem - now if we can only get him back to correcting it - instead of this entire thread - we may have salvaged another user from becoming an isolationist...
He drew "capacitive" effects - we just need to re-direct his efforts...
I went here,
https://en.wikibooks.org/wiki/Communication_Systems/Antennas
Found Hertzian Antennas...
If you look at the diagrams and then his
Then his ....
Hence the problem - now if we can only get him back to correcting it - instead of this entire thread - we may have salvaged another user from becoming an isolationist...
He drew "capacitive" effects - we just need to re-direct his efforts...
man this is an informative thread!
based upon all the good info here, i have made a couple of changes to my antenna system.
I took a hacksaw and cut my aluminum vertical right down the center. then i folded the two halves down to a perfect horizontal angle.
now my signal is coming out the ends of the antenna and my neighbors have never heard me so clearly!
they told my my audio was louder too!
LC
based upon all the good info here, i have made a couple of changes to my antenna system.
I took a hacksaw and cut my aluminum vertical right down the center. then i folded the two halves down to a perfect horizontal angle.
now my signal is coming out the ends of the antenna and my neighbors have never heard me so clearly!
they told my my audio was louder too!
LC
I called, but all I got was some dude trying to sell me an amp.... weird.
~Cheers~
~Cheers~
You just need one of those exposed coil antennas, the reason they work so well is because as the signal goes around that coil the centrifugal force throws the RF off the side of the antenna before it can make it to the top and go straight up.
