Unless the antenna is 1/2 wave above a prfectly conducting ground or
counterpoise, it really won't matter because it won't be directional.

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca

Gregg wrote:

Unless the antenna is 1/2 wave above a prfectly conducting ground or
counterpoise, it really won't matter because it won't be directional.


Could you direct me to a source for this theory?

Thanks,

Dale W4OP

Many people will be real disapointed that their Beverage really doesn't work
after all, eh?
"Dale Parfitt" wrote in message
...


Gregg wrote:

Unless the antenna is 1/2 wave above a prfectly conducting ground or
counterpoise, it really won't matter because it won't be directional.


Could you direct me to a source for this theory?

Thanks,

Dale W4OP

Behold, CW signalled from keyed 4-1000A filament:

Many people will be real disapointed that their Beverage really doesn't
work after all, eh?

Let's let him have a wee frustration, then we'll tell him to terminate the
far end with a 600 ohm resistor ;-)

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca

Behold, Dale Parfitt signalled from keyed 4-1000A filament:



Gregg wrote:

Unless the antenna is 1/2 wave above a prfectly conducting ground or
counterpoise, it really won't matter because it won't be directional.


Could you direct me to a source for this theory?

Thanks,

Dale W4OP

ARRL Antenna Anthology.

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca

For fractional wavelength antennas, directionality will be lost at low
heights. At one wavelength or longer, they become directioal at any height.
"Gregg" wrote in message
news:WmPcb.2427$uG.1407@edtnps84...
Behold, Dale Parfitt signalled from keyed 4-1000A filament:



Gregg wrote:

Unless the antenna is 1/2 wave above a prfectly conducting ground or
counterpoise, it really won't matter because it won't be directional.


Could you direct me to a source for this theory?

Thanks,

Dale W4OP

ARRL Antenna Anthology.

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca

Gregg wrote:

Behold, Dale Parfitt signalled from keyed 4-1000A filament:

Gregg wrote:

Unless the antenna is 1/2 wave above a prfectly conducting ground or
counterpoise, it really won't matter because it won't be directional.
Antenna theory, and NEC modeling radically disagree with this- How many
antennas do you want to see that are not 1/2 wave above a perfect ground
and yet show outstanding directionality?

W4OP

Behold, Dale Parfitt signalled from keyed 4-1000A filament:

Antenna theory, and NEC modeling radically disagree with this- How
many
antennas do you want to see that are not 1/2 wave above a perfect
ground and yet show outstanding directionality?

W4OP

Phased arrays can be made directional. We are talking longwires here.

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca

Gregg wrote:

Behold, Dale Parfitt signalled from keyed 4-1000A filament:

Antenna theory, and NEC modeling radically disagree with this- How
many
antennas do you want to see that are not 1/2 wave above a perfect
ground and yet show outstanding directionality?

W4OP

Phased arrays can be made directional. We are talking longwires here.


So am I. The higher a longwire antenna is in terms of wavelength, the
better defined the nulls become; i.e. its directional characteristics are
enhanced. Nothing magical about 1/2 wave above perfectly conducting
ground.
If you can read AO files, I'll be happy to send a file demonstrating this.

W4OP

Behold, Dale Parfitt signalled from keyed 4-1000A filament:



Gregg wrote:

Behold, Dale Parfitt signalled from keyed 4-1000A filament:

Antenna theory, and NEC modeling radically disagree with this- How
many
antennas do you want to see that are not 1/2 wave above a perfect
ground and yet show outstanding directionality?

W4OP

Phased arrays can be made directional. We are talking longwires here.


So am I. The higher a longwire antenna is in terms of wavelength, the
better defined the nulls become; i.e. its directional characteristics
are enhanced. Nothing magical about 1/2 wave above perfectly conducting
ground.
If you can read AO files, I'll be happy to send a file demonstrating
this.

W4OP

Great! I learn something new every day :-)

AO file? I'm sure I can apt-get something to read them (I run Linux).
Fire away!

geek at scorpiorising dot ca

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca