On Dec 26, 7:06 am, David wrote:
On Mon, 25 Dec 2006 23:48:08 -0800, John Smith





wrote:
Telamon wrote:
...
Well, I think you mean noise currents. The signals the single element
antenna picks up are also common mode.

Here the voltage type UNUN has the advantage of DC isolation between the
...

Balun = "BALanced-to-UNbalanced"

Unun = "UNbalanced-to-UNbalanced"

What type of antenna you are feed AND what type of feed your
rcvr/xmitter expects SOLELY determines if you should use a balun or a
unun ...

Regards,
JS

David - What you call "Semantics."
in a Technical Field like Electronics
are Words-that-Have-Meanings and
are used to Communcate Effectively .

i hope that we are communicating . . .
semantically speaking that is ~ RHF

In article ,
John Smith wrote:

Telamon wrote:
...
Well, I think you mean noise currents. The signals the single element
antenna picks up are also common mode.

Here the voltage type UNUN has the advantage of DC isolation between the
...

Balun = "BALanced-to-UNbalanced"

Unun = "UNbalanced-to-UNbalanced"

What type of antenna you are feed AND what type of feed your
rcvr/xmitter expects SOLELY determines if you should use a balun or a
unun ...


That's the conventional terminology. I capitalize to make the acronym
obvious.

Five reasons I can think of to use some type of transformer.

1. Impedance transformation.

2. Matching a balanced or unbalanced antenna to the same for the feed
line used.

3. DC static electricity isolation.

4. Isolate RF ground from AC mains ground.

5. Decouple the antenna feed from the antenna so the feed does not act
as part of the antenna.

--
Telamon
Ventura, California

Telamon wrote:
...

This is where it is necessary to implement the "KISS Rule", one device
is usually used to do most if not all that.

However, one can feel important by over-complicating things ...

JS

John Smith wrote:
Telamon wrote:
...

This is where it is necessary to implement the "KISS Rule", one device
is usually used to do most if not all that.

However, one can feel important by over-complicating things ...

JS

Or learning disabled, as in your case................

On Dec 26, 11:10 am, John Smith wrote:
Telamon wrote: ...

This is where it is necessary to implement the "KISS Rule", one device
is usually used to do most if not all that.

- However, one can feel important by over-complicating things ...
-
- JS

ego - 'i' am very very very important ~ RHF

On Dec 26, 10:42 am, Telamon
wrote:
In article ,
John Smith wrote:





Telamon wrote:
...
Well, I think you mean noise currents. The signals the single element
antenna picks up are also common mode.

Here the voltage type UNUN has the advantage of DC isolation between the
...

Balun = "BALanced-to-UNbalanced"

Unun = "UNbalanced-to-UNbalanced"

What type of antenna you are feed AND what type of feed your
rcvr/xmitter expects SOLELY determines if you should use a balun or a
unun ...That's the conventional terminology. I capitalize to make the acronym
obvious.

Five reasons I can think of to use some type of transformer.

1. Impedance transformation.

2. Matching a balanced or unbalanced antenna to the same for the feed
line used.

3. DC static electricity isolation.

4. Isolate RF ground from AC mains ground.

5. Decouple the antenna feed from the antenna so the feed does not act
as part of the antenna.

--
Telamon
Ventura, California

Telamon - Well Reasoned ~ RHF

Telamon wrote:


reasons I can think of to use some type of transformer.


3. DC static electricity isolation.

I would respectfully submit that static electricity is -NOT- DC