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"Dan/W4NTI" w4nti@get rid of this mindspring.com wrote in message link.net... "zeno" wrote in message ... Seems like everyone I talk to about using ladder line to my proposed 540' horizontal skywire loop does a double take when I say I want to use ladder line into the shack. I was curious if there are any fans of ladderline feed systems who can relate positive experiences, or am I about to really court disaster here. The ARRL antenna book says that coax to this type of antenna is not as "multiband" friendly as was once fantasized....they recommend ladder line. Anyone actually have such a loop? What is your experience? Bill, K6TAJ I use 450 ohm ladder line on two seperate antennas here. One is a full sized 40 meter loop, in right triangle configuration, vertical. I run the line straight into the shack and into a EF Johnson Matchbox. Works all bands 40 thr 10 just fine. I run 600 watts into it, and no problems. No TVI, No computer faults, no telephone problems. On the other antenna I have a 140 CF doublet with 450 Ladder Line feed. This into a Heathkit SA-2040 tuner. Same same as above. The reason I am able to run the LL into the shack is that I have a large out building that I have the shack in. Run it right through, not a problem. Just keep the line away from conductive objects and I run it up to my ceiling then out. Dan/W4NTI slightly off topic.... Hi Dan, What kind of lightning protection do you employ for straight ladderline? What are the options (besides tossing it out the window) - if you aren't using any? I don't run any feeds through my windows, so I wondered what options that left for ladderline, etc. Thanks Jack Virginia Beach |
#2
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On Sun, 25 Apr 2004 21:37:53 -0400, "Jack Painter"
wrote: "Dan/W4NTI" w4nti@get rid of this mindspring.com wrote in message hlink.net... "zeno" wrote in message ... Seems like everyone I talk to about using ladder line to my proposed 540' horizontal skywire loop does a double take when I say I want to use ladder line into the shack. I was curious if there are any fans of ladderline feed systems who can relate positive experiences, or am I about to really court disaster here. The ARRL antenna book says that coax to this type of antenna is not as "multiband" friendly as was once fantasized....they recommend ladder line. Anyone actually have such a loop? What is your experience? Bill, K6TAJ I use 450 ohm ladder line on two seperate antennas here. One is a full sized 40 meter loop, in right triangle configuration, vertical. I run the line straight into the shack and into a EF Johnson Matchbox. Works all bands 40 thr 10 just fine. I run 600 watts into it, and no problems. No TVI, No computer faults, no telephone problems. On the other antenna I have a 140 CF doublet with 450 Ladder Line feed. This into a Heathkit SA-2040 tuner. Same same as above. The reason I am able to run the LL into the shack is that I have a large out building that I have the shack in. Run it right through, not a problem. Just keep the line away from conductive objects and I run it up to my ceiling then out. Dan/W4NTI slightly off topic.... Hi Dan, What kind of lightning protection do you employ for straight ladderline? What are the options (besides tossing it out the window) - if you aren't using any? I don't run any feeds through my windows, so I wondered what options that left for ladderline, etc. I've found the easiest thing is to insert banana jacks/plugs in the ladderline just outside the window. When the clouds come, I simply unplug. The Wireman sells a balanced-line lightning arrester built around a couple of spark plugs, but I'm not sure how well it works. Bob k5qwg Thanks Jack Virginia Beach |
#3
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"Jack Painter" wrote in message news:SJZic.41278$fq4.23897@lakeread05... "Dan/W4NTI" w4nti@get rid of this mindspring.com wrote in message link.net... "zeno" wrote in message ... Seems like everyone I talk to about using ladder line to my proposed 540' horizontal skywire loop does a double take when I say I want to use ladder line into the shack. I was curious if there are any fans of ladderline feed systems who can relate positive experiences, or am I about to really court disaster here. The ARRL antenna book says that coax to this type of antenna is not as "multiband" friendly as was once fantasized....they recommend ladder line. Anyone actually have such a loop? What is your experience? Bill, K6TAJ I use 450 ohm ladder line on two seperate antennas here. One is a full sized 40 meter loop, in right triangle configuration, vertical. I run the line straight into the shack and into a EF Johnson Matchbox. Works all bands 40 thr 10 just fine. I run 600 watts into it, and no problems. No TVI, No computer faults, no telephone problems. On the other antenna I have a 140 CF doublet with 450 Ladder Line feed. This into a Heathkit SA-2040 tuner. Same same as above. The reason I am able to run the LL into the shack is that I have a large out building that I have the shack in. Run it right through, not a problem. Just keep the line away from conductive objects and I run it up to my ceiling then out. Dan/W4NTI slightly off topic.... Hi Dan, What kind of lightning protection do you employ for straight ladderline? What are the options (besides tossing it out the window) - if you aren't using any? I don't run any feeds through my windows, so I wondered what options that left for ladderline, etc. Thanks Jack Virginia Beach I don't have any lightning protection on them at this point. I normally disconnect things when I leave the 'shack' anyway. However back in the old days the use of spark gaps were common for open wire line. Get some of the real Old Timers here to talk about that one. Dan/W4NTI |
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