What effect does a tuner have at the antenna?
 

"it is no better than a dummy load."
Well, good. If it does it's job as well as a dummy load does it's
job, then I would think it's doing a pretty good job. Wouldn't you?
'Course, they don't have the same job so I wouldn't expect one to
replace the other (although, it isn't impossible).
Where are you going with this Cecil?
- 'Doc

What effect does a tuner have at the antenna?
 

Cecil Moore wrote:
David G. Nagel wrote:
An antenna tuner does not and can not and will not make any physical
or electrical changes to any antenna it is attached to.

Seems to me that delivery of the maximum available power
to the radiation resistance of an antenna is certainly
a physical/electrical change capable, in the extreme, of
melting the antenna.

Consider what a 1kw amp could do to a 40m hamstick used
on 75m when matched with a 1kw antenna tuner.

It will do to it just what the Hamstick deserves! ;^)

- 73 de Mike N3LI -

What effect does a tuner have at the antenna?
 

Cecil Moore wrote:
AI4QJ wrote:
You can take advantage of the "information" provided by the
transmitter, with reference to its Z0 match condition, by merely
observing the maximum available output power.

The point is, it can be monitored *at the antenna*
thus proving that a tuner does indeed have an effect
at the antenna.

All canards have a kernel of truth in them. My guess is that someone
observed that an antenna "tuner" would "tune" a wide variety of oddball
antennas to transmitters that were looking for a particular impedance.

Then to simplify matters, someone said "the transmitter doesn't care
what is on the end of it, so long as it sees that 50 ohms impedance.

It's a short drive from there to "the tuner has no effect on the antenna".

- 73 de Mike N3LI -

What effect does a tuner have at the antenna?
 

wrote:
Where are you going with this Cecil?

"Reflections"
--
73, Cecil http://www.w5dxp.com

What effect does a tuner have at the antenna?
 

Michael Coslo wrote:
It's a short drive from there to "the tuner has no effect on the antenna".

Actually, it went farther than that:

From QRZ.com regarding tuners:

"The tuner has absolutely no effect at the antenna."

From eHam.net regarding tuners:

"Does nothing. The tuner as the other poster said,
just makes your radio happy."
--
73, Cecil http://www.w5dxp.com

What effect does a tuner have at the antenna?
 

Cecil Moore wrote:
wrote:
Where are you going with this Cecil?

"Reflections"


Again? ;^)


- 73 de Mike N3LI -

What effect does a tuner have at the antenna?
 

Cecil Moore wrote:
David G. Nagel wrote:
Cecil Moore wrote:
Consider what a 1kw amp could do to a 40m hamstick used
on 75m when matched with a 1kw antenna tuner.

How much change in physical length or diameter of wire does an antenna
tuner make to an antenna?

In the above example, it vaporizes the hamstick wire.
IMO, that is quite a change.

Cecil;

A "HAMSTICK" antenna has a "MAX" power rating. If you exceed this power
rating you will indeed vaporize the wire. Of course this is true of ALL
antenna's. Hook up a 50,000 watt transmitter to a 20 gage wire dipole
and watch the copper vapor drift off in the wind.
I am currently to lazy to look up the HAMSTICK power rating but you can
at your leisure.

Dave

PS: Good to talk with you again, it's been a while. I learn from you
each time, usually.

What effect does a tuner have at the antenna?
 

David G. Nagel wrote:
A "HAMSTICK" antenna has a "MAX" power rating. If you exceed this power
rating you will indeed vaporize the wire.

The point is that if an amp is equipped with foldback,
it probably cannot vaporize a severely mismatched antenna
without the aid of an antenna tuner.
--
73, Cecil http://www.w5dxp.com

What effect does a tuner have at the antenna?
 

Cecil Moore wrote:
David G. Nagel wrote:
A "HAMSTICK" antenna has a "MAX" power rating. If you exceed this
power rating you will indeed vaporize the wire.

The point is that if an amp is equipped with foldback,
it probably cannot vaporize a severely mismatched antenna
without the aid of an antenna tuner.

Actually it will most likely vaporize the tuner first...

What effect does a tuner have at the antenna?
 

Cecil Moore wrote:
Consider what a 1kw amp could do to a 40m hamstick used
on 75m when matched with a 1kw antenna tuner.

David:
How much change in physical length or diameter of wire does an
antenna tuner make to an antenna?

Cecil:
In the above example, it vaporizes the hamstick wire.
IMO, that is quite a change.

You have a tuner that vaporizes hamsticks?


Craig 'Lumpy' Lemke

www.n0eq.com