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eHam Forums / Antennas and Towers and more / RE: Phasing Line Tuning
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on: May 16, 2013, 08:40:55 AM
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That phasing calculator assumes two verticals each with a specific impedance. To really do it correctly you need to measure the impedance of the actual verticals used- the phasing line is not necessarily 71 degrees long. One program that can do the calculations is "simpfeed"
And with dipoles I think you need something completely different.
Tor N4OGW
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eHam Forums / DXing / RE: ARGH !.....DAMNIT !!!!!
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on: May 15, 2013, 08:41:30 AM
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Do you guys on the east coast regularly get short-path propagation to 3A? From here I have only worked Monaco long path (this was on 15 m). From W6 long path might not be too hard but from the midwest long path into western Europe is a very long distance.
Tor N4OGW
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eHam Forums / Station Building / RE: Too many radio choices!
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on: May 02, 2013, 09:44:06 AM
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My shack parameters: I have tall trees behind the house that I could string an antenna up in. The problem is that anything QRP would likely lose the signal in the feed line. (~200 ft worth of feed to be safe) My 'shack' would be on the second story so anything ground-mounted would be going down ~16 feet. That being said I can hang things from the eves of the house.
200 feet of coax really isn't a problem below 30 MHz. If the trees are tall enough a dipole strung up there will far outperform something hung from the eaves of the house. And you will have less RFI to and from other electronics in your house. Tor N4OGW
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eHam Forums / DXing / RE: Modifying an MA-160V turning it into a great lowband DX antenna
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on: April 14, 2013, 04:43:22 PM
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KY6R: your web page says you had a dipole at 65 feet. Why not hang an inverted L from that tree?
Because the squirrels constantly eat through the rope - and the wire antennas keep falling. I finally am giving up on that. I was also using one of the neighbors trees - a 70' Monterrey Pine that he is most likely going to cut down this summer as its starting to die. But that 40M dipole up 65' was a very good antenna while it lasted . . . Yes, wire antennas in trees are a pain to maintain  A tree-supported inverted L with 65 ft vertical can work well on 160- I used to have one up here and remember working 3B9 with it. Tor N4OGW
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eHam Forums / DXing / RE: Modifying an MA-160V turning it into a great lowband DX antenna
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on: April 14, 2013, 06:52:32 AM
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.... I have used a L and many many many hams use a L with good success on Top Band, they do work. From what I understand if you wanted to work more USA you might want the L over a T . But for dxing , I will stick with the T for now. The claim is a T receives better than a L . I have no clue . I use lots of Beverage antenna but then again the T does receive signals very good.
I am no expert on this subject but this my understanding of the antennas and experience I have had.
Basically the choice between a T and L is simple- they are both just shortened verticals. Go with the one that allows you to put up the highest vertical section. If you can put up either, go with the T. Receiving isn't that important because you really want a separate directional rx antenna anyway. KY6R: your web page says you had a dipole at 65 feet. Why not hang an inverted L from that tree? Tor N4OGW
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eHam Forums / Antennas and Towers and more / RE: 40M vertical wire
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on: April 04, 2013, 01:07:46 PM
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What I would really recommend is a four square as close to the salt water as possible. Sink pressure treated 4X4s at the four corners as a base and mount a crappie rod or bamboo pole on each 4X4. Run a wire along the support. It will only be a bit over 16ft tall. 8ft 4X4 with ~5 ft above ground + 11-12 ft fishrod It could be a few feet less if needed just use top loading. This way you will get some gain and some directivity which can make all the difference if you have some trouble hearing due to QRN/QRM. It might even make one of those LP+SP uber-rare DX CW 30+WPM multipath signals that are ringing like crazy become more decodeable. Even a two element 15m vertical array would be obviously better than a single vertical or trying to make a 40m/15m combo compromise vertical.
Yes, if you really have a "salt marsh" at your qth, start building vertical arrays! They will work very well. Tor N4OGW
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eHam Forums / DXing / RE: DX award degree of difficulty?
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on: March 31, 2013, 08:54:22 AM
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N4OGW wrote: There are NO individual band honor roll categories; only mode categories. 73, Chuck NI0C I know that. Just pointing out that if you want you can look at the numbers and draw the "HR" line wherever you like... Tor N4OGW
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eHam Forums / DXing / RE: DX award degree of difficulty?
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on: March 31, 2013, 08:23:46 AM
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AA6YQ wrote: Beyond "Mixed DXCC Honor Roll" lies - Honor Roll on individual bands - Honor Roll on individual modes - Mixed Top of the Honor Roll - Top of the Honor Roll on individual bands - Top of the Honor Roll on individual modes - the DXCC Challenge DeSoto Cup
I'm not sure that ARRL has a formal Honor Roll listing for individual bands, but it would be nice if they did. In any event, these are all worthy goals to strive for! 73, Chuck NI0C Right here- well at least you can tell current HR: http://www.arrl.org/dxcc-standingsTor N4OGW
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eHam Forums / DXing / RE: VK9CZ is QRV
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on: March 30, 2013, 08:35:30 PM
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0145 UTC, just barely hear a whisper of them on 21016.
That's about when I worked them- I was surprised the pileup was so small. They were calling for US stations but I think most couldn't hear them. Long path. Tor N4OGW
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eHam Forums / DXing / RE: Any New Antennas Planned for DX-ing?
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on: March 28, 2013, 10:45:36 AM
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On my quarter-acre lot there's not much more I can do other than go significantly higher, which I can't really afford. No space for Beverages, my K9AY is in one corner, an inverted-L for 160 over top of the driveway, tower in the middle. About all I could do would be a vertical in the furthest corner of the yard, but I can't see to what end. I already hear as well as possible on 80 given local noise levels, and can work everything I hear, plus I'm an alligator on 160--and I don't see a way of improving my 160 RX, but I'm sure open to ideas on that front. I've got a reliable range of about 4000 miles on 160. Anything beyond that and it's a crapshoot and relies solely on the quality of the build on the DX side (missed Peter1, 7O6T and a host of other big-name operations beyond that limit).
Probably your inverted L is re-radiating a lot of noise into your K9AY. One potential improvement for low-band rx would be to try detuning the inverted L while receiving. Tor N4OGW
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eHam Forums / Elmers / RE: Wire Recommendations for buried radials
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on: March 26, 2013, 02:51:48 PM
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Same wire. #14 stranded. Put lug on the end and use a long nail to hold it in place. DX Engineering sells lawn staples. Dogs and opossums will dig up any wire.
Yes, but get solid rather than stranded. First, it is usually cheaper than stranded. Second, it is much easier to clean solid wire in case you need to fix an old connection. Third, you can silver solder (braze) it so that the connections pretty much last forever. Tor N4OGW Huh? Solid wire is a total pain in the ass to straighten out and keep from coiling back up. Secondly, I have found no difference from soldering stranded or solid. Brazing? Totally overkill. When I connected my ground radials, I soldered a lug to them, and the the solder connection is permanent. I occasionally removed the lug to wirebrush it out and then reattach to antenna. It's fairly simple. Don't overcomplicate it and make the person do unnecessary work. Yes, stranded is easy to solder when new, but what about when 5 years later you cut a radial and want to repair it? Or need a new lug on it? With solid you can just sand or steel wool the wire and it is easy to solder 20 seconds later. Good luck trying to solder old oxidized stranded copper! Tor N4OGW
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eHam Forums / Elmers / RE: Wire Recommendations for buried radials
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on: March 26, 2013, 06:05:54 AM
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Same wire. #14 stranded. Put lug on the end and use a long nail to hold it in place. DX Engineering sells lawn staples. Dogs and opossums will dig up any wire.
Yes, but get solid rather than stranded. First, it is usually cheaper than stranded. Second, it is much easier to clean solid wire in case you need to fix an old connection. Third, you can silver solder (braze) it so that the connections pretty much last forever. Tor N4OGW
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