View Single Post
  #167   Report Post  
Old December 31st 08, 10:56 PM posted to rec.radio.shortwave
Telamon Telamon is offline
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 4,494
Default MatchBoxes Do They Work ? -aka- Improve Your Effective Radiated Power ?

In article ,
John Smith wrote:

RHF wrote:
On Dec 29, 1:44 pm, John Smith wrote:
RHF wrote:

[...]

- Anyway you cut it ... a matchbox never will improve
- the performance of a poor antenna,

JS,

So you are saying that I have an Antenna and Transceiver
and can hear 5 Radio Operators in a Net on a Frequency;
but only 2 of them can hear me.

I then put a MatchBox in-line between my Antenna and
Transceiver and Adjust-It; and can still hear all 5 Radio
Operators on a Frequency and now all 5 of them can
hear me.

To Me That Is Very Real Improved Performance from
My Antenna and Transceiver that is a direct result of
using the MatchBox between them. ~ RHF
.

increase the capture area of a poor antenna, etc.

It will MASK that antennas' short-comings ... same as sweeping dirt
under a rug (notice, another mechanical analogy to the above.)



I guess, any possibly way it can be explained to you, will fail ...

If you introduce an inductance to resonate the antenna, you introduce a
loss, if you introduce a capacitance, the same ... LC or PI networks,
commonly used in matchboxes, have notable losses.

I have a 60ft longwire, mounted ~40 ft. in the air. Since it is only
physically resonate on but a couple/few freqs, and, since I am not
employing some form of matching on the antenna, and since the antenna
does not, naturally, present a correct impedance to my feedline/rig,
some form of lossy matching must be tolerated ... since the matchbox is
located at my receiver, whatever feedlines I choose will also become a
part of the "antenna." The ideal placement for a matchbox would be at
the antenna, as everyone is and has been aware of for a long time, or
should have been aware.

As I stated, continue to state, and have no other choice than to state
when worried about being correct--no matchbox will ever improve the
performance of a poor antenna--all it can do is allow you to get maximum
benefit of that poor performance.


SNIP

"all it can do is allow you to get maximum benefit of that poor
performance"

What the hell is this supposed to mean?

My best guess is you can continue to wrong.

--
Telamon
Ventura, California