Home |
Search |
Today's Posts |
#1
![]() |
|||
|
|||
![]()
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
![]() |
|||
|
|||
![]()
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
![]() |
|||
|
|||
![]()
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
![]() |
|||
|
|||
![]() "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
![]() |
|||
|
|||
![]() "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 |
#6
![]() |
|||
|
|||
![]() |
#7
![]() |
|||
|
|||
![]() |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Antenna building questions | Antenna | |||
AR88 Restoration project: Some Questions. | Boatanchors | |||
Extra Class License Study Material | Antenna | |||
BEWARE SPENDING TIME ANSWERING QUESTIONS HERE (WAS Electronic Questions) | Antenna | |||
olympus stylus 300/400 basic operation questions on digital camera | Digital |