RadioBanter - View Single Post - What effect does a tuner have at the antenna?

David G. Nagel · June 5th 08, 06:36 PM posted to rec.radio.amateur.antenna

wrote:
...100% efficient? The only thing I have ever had that was 100%
efficient was my 'Ex', which she pointed out to me quite often. So,
using a tuner that got just a tiny bit 'warm' from it's inefficiency
just wasn't/isn't that big'a deal. When it became noticeably 'warm',
it was because I was trying to match something that just was not very
close to reasonable. Then again, it sort of depends on the tuner you
happen to be using, it's 'usable' impedance matching range, just how
'robust' the thing happens to be built, and what you are trying to do
with it to start with. There are limits. How often you approach
those limits sort of defines how much heat you will see, they make
pretty nice coffee warmers at times , not the best idea in the
world, but...
- 'Doc

And just for 'grins', for those who do not 'approve' of using a tuner,
what do you think those gama, delta, and other variety of thingys on
the feed point of that beam are?
(if that don't stir the 'worm soup' up a little, I just haven't had
enough coffee yet. I'm still warming it on the tuner.)

For more grins, what do you think the "LOAD" and "TUNE" knobs on an
older tube transmitter are? They match the output power tube impedance
to the antenna system impedance. If you don't believe me mistune a tube
transmitter and feel the warmth come from the finals. Have a spare in
stock for when you are done.

Dave WD9BDZ