New answers tagged antenna-tuner
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I use an SPC (series parallel capacitor) matchbox, or transmatch as designed by Lew McCoy W1ICP (SK).
You're not tuning squat. You're matching the transmitter to the antenna system. - Feedline, traps, baluns - everything between TX out to antenna input. The antenna is or should be tuned, cut to frequency, resonant. So whats the problem simple change ...
-2
AS A HAM FOR 59 YRS, 1. BYPASS THE INTERNAL "TUNER", AND USE A MANUAL (MATCHBOX, TRANSMATCH, COUPLER ETC) BOTH THE BOX ON UR DESK AND / OR THE ONE BUILT INTO YOUR RIG ARE NOT, ARE NOT, ANTENNA TUNERS.
WHEN YOU CUT A DIPOLE FOR 7.25 MHZ AT 64.55' YOU HAVE "TUNED" THAT ANTENNA. CHANGE YOUR FREQUENCY, YOU MUST CHANGE THE LENGTH OF YOUR DIPOLE. - THATS TUNING.
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1
First, I'd say that using both the tuner for the antenna and your built-in antenna tuner probably didn't hurt anything, but was most likely unnecessary. You would have a bit more efficiency if you put your internal tuner on bypass. Of course if you adjusted the whip's tuner at a particular frequency, and then changed the frequency, then you might have had ...
3
It is not normal to have and use tuners on both ends of a feed line.
The purpose of an antenna tuner is to provide an adjustable impedance transformation. The reason we want that transformation is so that the transmitter can work into the (usually) 50 Ω load it was designed for.
If you have an antenna tuner located (only) at the antenna, then this is the ...
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