|[AMRadio] antenna tuners|
bcarling at cfl.rr.com
Thu Apr 20 07:29:03 EDT 2006
> I don't believe in them.
> If you can't resonate your antenna, then what are you doing?
You ar etransmitting some energy and you are getting a whole
lot of reflected power that is wasted. You might also be cutting
back a lot of your power in the final RF amplifier of a modern rig.
> If you use a tuner, you are creating a voltage divider effect that
> creates a reactive load in your shack, to ground that makes your antenna
> "feed line + radiating elements".
Maybe - what if the tuner is outside at the base of the antenna?
> Over the years, the importance of having at least a 2:1 match with at
> least 1.5:1 some where in the the antenna design.
Over the years many of us have transmitted with a 3:1 SWR and
no tuner and made plenty of contacts - tube finals of course!
> Proper antenna design for your favorite frequencies is the best choice.
But some of us can't always get what we want. When you MUST
compromise, there is a LOT of good that can be said about
a matching network for one's antenna. It is usually an impedance
transformer rather than a "voltage divider."
> I currently use a multi-element dipole to cover 80,40,20,15 and 10 meters.
> Just like microphones in the sound work I help out with at church. If
> they are not singing into the mic, I cannot "fix it" without creating a
> gain structure that is sucking up to feed back"
Different entirely from an antenna tuner.
> You need to fix your problems at the source.
The antenna is the load.
> I our cases, it is resonance of your antenna, by some means.
> Even my hamstick on my jeep
I have had GREAT success RESONATING antennas with a matching
network. I don't understand why anyone would "not believe in"
something when they are so effective.
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