Dave wrote:
your request makes no sense... just what are you trying to do??

wrote in message
oups.com...
Hello,

Does anyone know of any AC (alternating current) 220V or 350V
Shortwave Antenna circuits? It is for use with a long vertical wire
antenna or TV antenna pole. I was wondering if anybody new of any
antenna circuits that meat this description.

Thank you,
Matthew William Coan
Sat Jul 15 15:48:04 EDT 2006


I am trying to make a powered shortwave antenna circuit for use with a
shortwave crystal radio. I wanted the circuit to use power directly
from the wall socket (AC 220V) so as to make a powerful and sensitive
antenna out of a TV antenna or just a long wire.

Thank You,
Matthew William Coan
Sat Jul 15 17:32:10 EDT 2006

wrote:
Dave wrote:
your request makes no sense... just what are you trying to do??

wrote in message
oups.com...
Hello,

Does anyone know of any AC (alternating current) 220V or 350V
Shortwave Antenna circuits? It is for use with a long vertical wire
antenna or TV antenna pole. I was wondering if anybody new of any
antenna circuits that meat this description.

Thank you,
Matthew William Coan
Sat Jul 15 15:48:04 EDT 2006


I am trying to make a powered shortwave antenna circuit for use with a
shortwave crystal radio. I wanted the circuit to use power directly
from the wall socket (AC 220V) so as to make a powerful and sensitive
antenna out of a TV antenna or just a long wire.

Thank You,
Matthew William Coan
Sat Jul 15 17:32:10 EDT 2006

Sounds like you need an active antenna. Try Google on active antenna
and see what you get. An active antenna uses transistors or I.C's to
amplify very short or poor antennas to increase the signal strength.
Active antennas can be powered from AC mains with an appropriate power
supply.

With a crystal radio, normally you don't need any active devices. If
signal boost is desired, you can do it on the RF end (active antenna),
or on the Audio side (audio amp).
Good Luck.
Gary N4AST

wrote in message
ups.com...

Dave wrote:
your request makes no sense... just what are you trying to do??

wrote in message
oups.com...
Hello,

Does anyone know of any AC (alternating current) 220V or 350V
Shortwave Antenna circuits? It is for use with a long vertical wire
antenna or TV antenna pole. I was wondering if anybody new of any
antenna circuits that meat this description.


I am trying to make a powered shortwave antenna circuit for use with a
shortwave crystal radio. I wanted the circuit to use power directly
from the wall socket (AC 220V) so as to make a powerful and sensitive
antenna out of a TV antenna or just a long wire.

Thank You,
Matthew William Coan
Sat Jul 15 17:32:10 EDT 2006


From your written question - these observations.

1. English is not your native language. IF it is - your spelling and
grammar need work.

2. It appears to lack fundamental electrical and radio theory knowledge - a
good way to get electrocuted with commercial line voltages (120 or 220 VAC)
and appliances.

3. A crystal radio (shortwave) is limited by its overall sensitivity and the
RF from broadcast stations that it can capture by the antenna.
You just need a better antenna (higher in height or longer in length)

The Xtal Set Society
http://www.midnightscience.com/

Simple crystal radios
http://sci-toys.com/scitoys/scitoys/radio/radio.html

4. If you wish to improve the receiver - then you need to read Edwin
Armstrong (regenerative and superhetrodyne designs)
http://world.std.com/~jlr/doom/armstrng.htm
who blazed this trail you are attempting almost 100 years ago.

5. I think you need to follow this line of construction for improving your
crystal radio
http://www.techlib.com/electronics/crystal.html

http://www.thebest.net/wuggy/

http://www.schmarder.com/radios/crystal/

gb

"We who give advice or responses are survivors of the electrical and radio
craft --
those who made serious mistakes -- did not survive their mistakes."

wrote:
Dave wrote:

your request makes no sense... just what are you trying to do??

wrote in message
groups.com...

Hello,

Does anyone know of any AC (alternating current) 220V or 350V
Shortwave Antenna circuits? It is for use with a long vertical wire
antenna or TV antenna pole. I was wondering if anybody new of any
antenna circuits that meat this description.

Thank you,
Matthew William Coan
Sat Jul 15 15:48:04 EDT 2006



I am trying to make a powered shortwave antenna circuit for use with a
shortwave crystal radio. I wanted the circuit to use power directly
from the wall socket (AC 220V) so as to make a powerful and sensitive
antenna out of a TV antenna or just a long wire.

Thank You,
Matthew William Coan
Sat Jul 15 17:32:10 EDT 2006

Tell me where to send the flowers for your funeral.