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Old June 1st 04, 02:05 PM
Dan
 
Posts: n/a
Default New DX Questions

I apologize for the simplicity of my questions:

Last night was my first real attempt to dx on 20 meters. I heard a
couple people calling CQ then QRZed allowing a number of stations to
identify. I heard some of the responses, but most were near
impossible to copy (The CQer was always 59). I put out my callsign
after every QRZed but never got a response. Is this normal or am I
having a problem getting my signal out? SWR is tuned to 1:1, my power
meter shows 100% TX power. Using an Icom 728 w/100W power.

I have a G5RV antenna cut to 20m in my attic, fed to a tuner.
Obviously, there isn't enough room for the ladder line to extend all
the way down, so most of it is just routed horizontally from one side
of my attic to another where it meets my RG58.

This brings up another question. When determining health risks (i.e.
how far away you should be from your antenna) does the ladder line or
coax count as part of the antenna, or just the radials?

Thanks for the help.

Dan
  #2   Report Post  
Old June 1st 04, 03:16 PM
Keyboard In The Noise
 
Posts: n/a
Default

Dan -- to roughly determine how well your antenna is working have a local
friend with a good antenna system help you on the band. Let your friend call
CQ or make a contact and then ask the other station to listen for you and
give relative reports. Try this for short hop and long hop contacts. And on
several bands.

Since you have an attic antenna and perhaps not up too high (less than 20
feet) you will have a high angle of radiation -- not good for long haul
DXing. See "How high should your dipole be" URL:
http://www.qsl.net/aa3rl/ant2.html

Since you stated that the other station was CQing then QRZing, perhaps it
was a DX station and they were picking out the strong stations and not
hearing you well or at all. The DX station may have a big tower and beam
running power as opposed to your attic antenna and 100 watts.

Hearing a strong station probably means they have a good antenna system and
maybe running power and have a good propagation path to you. Not hearing
responses may mean they have very poor propagation path to you (or skipping
right over you). Hearing "one way" QSO's on the bands is common depending
where the stations are located.

Since you are new to DXing -- perhaps bone up on propagation, band
characteristics, techniques, antennas -- some good books at eHam URL:
http://www.eham.net/reviews/products/42

As for RF safety --see URL:
http://n5xu.ae.utexas.edu/rfsafety/

73 and GD DX

--
Keyboard In The Noise

Opinions are the cheapest commodities in the world. Author unknown but
"right on"
"Dan" wrote in message
om...
I apologize for the simplicity of my questions:

Last night was my first real attempt to dx on 20 meters. I heard a
couple people calling CQ then QRZed allowing a number of stations to
identify. I heard some of the responses, but most were near
impossible to copy (The CQer was always 59). I put out my callsign
after every QRZed but never got a response. Is this normal or am I
having a problem getting my signal out? SWR is tuned to 1:1, my power
meter shows 100% TX power. Using an Icom 728 w/100W power.

I have a G5RV antenna cut to 20m in my attic, fed to a tuner.
Obviously, there isn't enough room for the ladder line to extend all
the way down, so most of it is just routed horizontally from one side
of my attic to another where it meets my RG58.

This brings up another question. When determining health risks (i.e.
how far away you should be from your antenna) does the ladder line or
coax count as part of the antenna, or just the radials?

Thanks for the help.

Dan



  #3   Report Post  
Old June 1st 04, 03:16 PM
Keyboard In The Noise
 
Posts: n/a
Default

Dan -- to roughly determine how well your antenna is working have a local
friend with a good antenna system help you on the band. Let your friend call
CQ or make a contact and then ask the other station to listen for you and
give relative reports. Try this for short hop and long hop contacts. And on
several bands.

Since you have an attic antenna and perhaps not up too high (less than 20
feet) you will have a high angle of radiation -- not good for long haul
DXing. See "How high should your dipole be" URL:
http://www.qsl.net/aa3rl/ant2.html

Since you stated that the other station was CQing then QRZing, perhaps it
was a DX station and they were picking out the strong stations and not
hearing you well or at all. The DX station may have a big tower and beam
running power as opposed to your attic antenna and 100 watts.

Hearing a strong station probably means they have a good antenna system and
maybe running power and have a good propagation path to you. Not hearing
responses may mean they have very poor propagation path to you (or skipping
right over you). Hearing "one way" QSO's on the bands is common depending
where the stations are located.

Since you are new to DXing -- perhaps bone up on propagation, band
characteristics, techniques, antennas -- some good books at eHam URL:
http://www.eham.net/reviews/products/42

As for RF safety --see URL:
http://n5xu.ae.utexas.edu/rfsafety/

73 and GD DX

--
Keyboard In The Noise

Opinions are the cheapest commodities in the world. Author unknown but
"right on"
"Dan" wrote in message
om...
I apologize for the simplicity of my questions:

Last night was my first real attempt to dx on 20 meters. I heard a
couple people calling CQ then QRZed allowing a number of stations to
identify. I heard some of the responses, but most were near
impossible to copy (The CQer was always 59). I put out my callsign
after every QRZed but never got a response. Is this normal or am I
having a problem getting my signal out? SWR is tuned to 1:1, my power
meter shows 100% TX power. Using an Icom 728 w/100W power.

I have a G5RV antenna cut to 20m in my attic, fed to a tuner.
Obviously, there isn't enough room for the ladder line to extend all
the way down, so most of it is just routed horizontally from one side
of my attic to another where it meets my RG58.

This brings up another question. When determining health risks (i.e.
how far away you should be from your antenna) does the ladder line or
coax count as part of the antenna, or just the radials?

Thanks for the help.

Dan



  #4   Report Post  
Old June 1st 04, 06:41 PM
Dee D. Flint
 
Posts: n/a
Default


"Dan" wrote in message
om...
I apologize for the simplicity of my questions:

Last night was my first real attempt to dx on 20 meters. I heard a
couple people calling CQ then QRZed allowing a number of stations to
identify. I heard some of the responses, but most were near
impossible to copy (The CQer was always 59). I put out my callsign
after every QRZed but never got a response. Is this normal or am I
having a problem getting my signal out? SWR is tuned to 1:1, my power
meter shows 100% TX power. Using an Icom 728 w/100W power.


DX stations often have so many people calling that you may not be able to
cut through the pile up. Even if you only hear a handful of stations, the
DX station is probably hearing many that you do not. This is perfectly
normal. It often takes a great deal of patience to get through, especially
if the station is rare. Sometimes you never get through.

I have a G5RV antenna cut to 20m in my attic, fed to a tuner.
Obviously, there isn't enough room for the ladder line to extend all
the way down, so most of it is just routed horizontally from one side
of my attic to another where it meets my RG58.


This is less than ideal but you should still be able to work DX. If you can
hear them, it is generally possible to work them if not too many others are
trying at the same time. It will just take a lot more patience. A better
antenna setup would improve your chances.


This brings up another question. When determining health risks (i.e.
how far away you should be from your antenna) does the ladder line or
coax count as part of the antenna, or just the radials?


It depends on the setup. In the case of the G5RV, the ladder line is part
of the antenna for most bands and thus radiates so you should include the
ladder line in your calculation (other types of antennas with ladder line
may be different). Generally coax, if the antenna is properly set up, does
not radiate so you would not include the coax.


Dee D. Flint, N8UZE

  #5   Report Post  
Old June 1st 04, 06:41 PM
Dee D. Flint
 
Posts: n/a
Default


"Dan" wrote in message
om...
I apologize for the simplicity of my questions:

Last night was my first real attempt to dx on 20 meters. I heard a
couple people calling CQ then QRZed allowing a number of stations to
identify. I heard some of the responses, but most were near
impossible to copy (The CQer was always 59). I put out my callsign
after every QRZed but never got a response. Is this normal or am I
having a problem getting my signal out? SWR is tuned to 1:1, my power
meter shows 100% TX power. Using an Icom 728 w/100W power.


DX stations often have so many people calling that you may not be able to
cut through the pile up. Even if you only hear a handful of stations, the
DX station is probably hearing many that you do not. This is perfectly
normal. It often takes a great deal of patience to get through, especially
if the station is rare. Sometimes you never get through.

I have a G5RV antenna cut to 20m in my attic, fed to a tuner.
Obviously, there isn't enough room for the ladder line to extend all
the way down, so most of it is just routed horizontally from one side
of my attic to another where it meets my RG58.


This is less than ideal but you should still be able to work DX. If you can
hear them, it is generally possible to work them if not too many others are
trying at the same time. It will just take a lot more patience. A better
antenna setup would improve your chances.


This brings up another question. When determining health risks (i.e.
how far away you should be from your antenna) does the ladder line or
coax count as part of the antenna, or just the radials?


It depends on the setup. In the case of the G5RV, the ladder line is part
of the antenna for most bands and thus radiates so you should include the
ladder line in your calculation (other types of antennas with ladder line
may be different). Generally coax, if the antenna is properly set up, does
not radiate so you would not include the coax.


Dee D. Flint, N8UZE



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