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Question about feedline proximity
There's a particular spot at my home QTH that would be good for a
transmit antenna for 2 meters / 70 cm. Right now I'm picturing a j- pole made of copper tubing in that spot. The only hitch is that one 20 to 25 ft long section of the coax feedline to this antenna will need to run parallel to the coax feed to my hf receive-only loop. Within this 20-25 ft long span, the feedlines would be separated by about a foot. How concerned should I be about this, given that I'll probably never be using be using these antennas at the same time. I'm guessing the effects would be negligible. Am I wrong? |
#2
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Question about feedline proximity
On Sat, 27 Oct 2007 18:59:40 -0700, Steve
wrote: There's a particular spot at my home QTH that would be good for a transmit antenna for 2 meters / 70 cm. Right now I'm picturing a j- pole made of copper tubing in that spot. The only hitch is that one 20 to 25 ft long section of the coax feedline to this antenna will need to run parallel to the coax feed to my hf receive-only loop. Within this 20-25 ft long span, the feedlines would be separated by about a foot. How concerned should I be about this, given that I'll probably never be using be using these antennas at the same time. I'm guessing the effects would be negligible. Am I wrong? You're OK as long as it's one or the other. |
#3
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Question about feedline proximity
On Oct 30, 3:55 pm, "Dale Parfitt" wrote:
"David" wrote in message ... On Sat, 27 Oct 2007 18:59:40 -0700, Steve wrote: There's a particular spot at my home QTH that would be good for a transmit antenna for 2 meters / 70 cm. Right now I'm picturing a j- pole made of copper tubing in that spot. The only hitch is that one 20 to 25 ft long section of the coax feedline to this antenna will need to run parallel to the coax feed to my hf receive-only loop. Within this 20-25 ft long span, the feedlines would be separated by about a foot. How concerned should I be about this, given that I'll probably never be using be using these antennas at the same time. I'm guessing the effects would be negligible. Am I wrong? - - You're OK as long as it's one or the other. - What would be the outcome if both were used simulataneously - and why. - Dale Dale [W4OP], IF - By the same operator at the same time -possibly- a state-of-confusion on the part of the operator ) ~ RHF |
#4
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Question about feedline proximity
On Tue, 30 Oct 2007 16:15:35 -0700, RHF
wrote: On Oct 30, 3:55 pm, "Dale Parfitt" wrote: "David" wrote in message ... On Sat, 27 Oct 2007 18:59:40 -0700, Steve wrote: There's a particular spot at my home QTH that would be good for a transmit antenna for 2 meters / 70 cm. Right now I'm picturing a j- pole made of copper tubing in that spot. The only hitch is that one 20 to 25 ft long section of the coax feedline to this antenna will need to run parallel to the coax feed to my hf receive-only loop. Within this 20-25 ft long span, the feedlines would be separated by about a foot. How concerned should I be about this, given that I'll probably never be using be using these antennas at the same time. I'm guessing the effects would be negligible. Am I wrong? - - You're OK as long as it's one or the other. - What would be the outcome if both were used simulataneously - and why. - Dale Dale [W4OP], IF - By the same operator at the same time -possibly- a state-of-confusion on the part of the operator ) ~ RHF . One will couple into the other. Whether this matters is subject to investigation. |
#5
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Question about feedline proximity
On Nov 1, 6:55 am, David wrote:
On Tue, 30 Oct 2007 16:15:35 -0700, RHF wrote: On Oct 30, 3:55 pm, "Dale Parfitt" wrote: "David" wrote in message . .. On Sat, 27 Oct 2007 18:59:40 -0700, Steve wrote: There's a particular spot at my home QTH that would be good for a transmit antenna for 2 meters / 70 cm. Right now I'm picturing a j- pole made of copper tubing in that spot. The only hitch is that one 20 to 25 ft long section of the coax feedline to this antenna will need to run parallel to the coax feed to my hf receive-only loop. Within this 20-25 ft long span, the feedlines would be separated by about a foot. How concerned should I be about this, given that I'll probably never be using be using these antennas at the same time. I'm guessing the effects would be negligible. Am I wrong? - - You're OK as long as it's one or the other. - What would be the outcome if both were used simulataneously - and why. - Dale Dale [W4OP], IF - By the same operator at the same time -possibly- a state-of-confusion on the part of the operator ) ~ RHF . One will couple into the other. Whether this matters is subject to investigation.- Hide quoted text - - Show quoted text - A greater issue then the 'proximity' of the two FeedLines may be the 'proximity' of the two Antennas -If- both Antennas and FeedLine Systems are used at the same time. ~ RHF |
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