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#1
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Hi guys, long time no see.
Well for various reasons I missed out on the last two solar peaks and with another one comin' down the pike not so very far away I'm determined not to miss out on that one, too. Trouble is, I'm several floors up in a metropolitan area. It's not as bad as New York, but nevertheless very far from ideal. Any suggestions for an antenna type that's discreet (or at least not too outrageous) that gets out well at HF? Anything from 80m through 10m I'll take whatever I can get. I know given my geographical limitations I have to be realistic so I'm not looking at winning any contests or working DX every night. Just don't want to miss out entirely yet again. Any suggestions? |
#2
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phaedrus wrote:
Hi guys, long time no see. Well for various reasons I missed out on the last two solar peaks and with another one comin' down the pike not so very far away I'm determined not to miss out on that one, too. Trouble is, I'm several floors up in a metropolitan area. It's not as bad as New York, but nevertheless very far from ideal. Any suggestions for an antenna type that's discreet (or at least not too outrageous) that gets out well at HF? Anything from 80m through 10m I'll take whatever I can get. I know given my geographical limitations I have to be realistic so I'm not looking at winning any contests or working DX every night. Just don't want to miss out entirely yet again. Any suggestions? Got a outside facing window? Balcony? A 20 foot "black widow" collapsible fishing pole (try Cabelas online.. they run about $20 each, as of a couple years ago) can easily support a pretty long wire hanging down away from the side of the building. You have to think about the "other side" of the antenna, but another wire serves there. If you have multiple windows, or some way to stick the wire to the side of the building, you can make a sort of "limited radials" scheme (think of a ground plane vertical turned on its side). A tuner at the base of the antenna makes the mismatch issue go away, and you can run the coax from the tuner to your rig. The SGC-239 is convenient and works pretty well. (if you want to hop around bands or within a band, having to reset a manual tuner each time gets old, real fast, especially if the tuner is sitting on the windowsill or balcony rail at the "feedpoint" and the rig is inside on the table where it's more comfortable. lay in a good pile of appropriate EMI suppression cores (I like the #31 mix from Fair-Rite, available in a variety of forms from Mouser and Digikey, among others) so that you can deal with the inevitable RFI issues. |
#3
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On Feb 10, 1:29*pm, Jim Lux wrote:
phaedrus wrote: Hi guys, long time no see. Well for various reasons I missed out on the last two solar peaks and with another one comin' down the pike not so very far away I'm determined not to miss out on that one, too. Trouble is, I'm several floors up in a metropolitan area. It's not as bad as New York, but nevertheless very far from ideal. Any suggestions for an antenna type that's discreet (or at least not too outrageous) *that gets out well at HF? Anything from 80m through 10m I'll take whatever I can get. I know given my geographical limitations I have to be realistic so I'm not looking at winning any contests or working DX every night. Just don't want to miss out entirely yet again. Any suggestions? Got a outside facing window? Balcony? A 20 foot "black widow" collapsible fishing pole (try Cabelas online.. they run about $20 each, as of a couple years ago) *can easily support a pretty long wire hanging down away from the side of the building. *You have to think about the "other side" of the antenna, but another wire serves there. *If you have multiple windows, or some way to stick the wire to the side of the building, you can make a sort of "limited radials" scheme (think of a ground plane vertical turned on its side). A tuner at the base of the antenna makes the mismatch issue go away, and you can run the coax from the tuner to your rig. *The SGC-239 is convenient and works pretty well. (if you want to hop around bands or within a band, having to reset a manual tuner each time gets old, real fast, especially if the tuner is sitting on the windowsill or balcony rail at the "feedpoint" and the rig is inside on the table where it's more comfortable. lay in a good pile of appropriate EMI suppression cores (I like the #31 mix from Fair-Rite, available in a variety of forms from Mouser and Digikey, among others) so that you can deal with the inevitable RFI issues. I have used something very similar to what Jim mentioned but literally a collapsible fishing pole with wire tie-wrapped to it and another dangling from the balcony rail. Matching was provided via MFJ tuner. I found an antenna mount in the CB section of a truck stop that consisted of a CB mount welded to a pair of locking pliers. Jimmie |
#4
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g very similar to what Jim mentioned but literally
a collapsible fishing pole with wire tie-wrapped to it and another dangling from the balcony rail. Matching was provided via MFJ tuner. I found an antenna mount in the CB section of a truck stop that consisted of a CB mount welded to a pair of locking pliers. There's also things like a locking pliers (Vise-Grip) welded to a C-clamp or pipe clamp (which looks like a C-clamp, except the fixed part is a V shaped piece. There's also a clamp that is like a vise-grip, except instead of jaws, it has a piece of bicycle chain and a hook. You wrap the chain around whatever it is you want to clamp to, squeeze the handle and it locks it in place. http://www.irwin.com/irwin/consumer/...rwinProd100322 http://www.irwin.com/irwin/consumer/...IrwinCat100299 Take a look at a catalog for stage and theatrical rigging, grip or gaffer's supplies. There's a wealth of nifty things to attach stuff to poles/standards/posts, etc. They're always having to temporarily attach stuff on a set or stage. Things like grip clamps with a baby pin are useful.. For fun, take a look at the Matthews Meat Axe (pricey, but you can hang remarkable stuff from it) http://www.filmtools.com/gripclipandc.html http://www.stage-n-studio.com/Cat_04...ght-Grid-1.pdf If you want to get elaborate, look at stuff used to attach cameras to cars and other stuff. |
#5
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OK, thanks, guys. Antennas have always been my downfall. I'm afraid I
am not very practical in that respect. I have read about some resourceful people running a wire around the edge of their living rooms under the carpet and working DX with 10W but I wouldn't feel comfortable with that. I believe antennas should be way up in the air away from other stuff. Stick a wire under your carpet just seems like taking a bath with your clothes on; there's something not right about it! |
#6
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On Thu, 11 Feb 2010 07:35:19 -0800 (PST), phaedrus
wrote: I believe antennas should be way up in the air away from other stuff. You are way up in the air. The floor is merely an illusion of being on the ground. Stick a wire under your carpet just seems like taking a bath with your clothes on; there's something not right about it! Understandable, but it confuses the issue that you are already up in the air. Rather, it is like taking a very high antenna, and draping a carpet over it and nailing a floor under it. The building composition will certainly have an effect. However, if you have heard of people running a wire around the edge of their living rooms under the carpet and working DX with 10W then it would seem reasonable that their building composition is only marginally affecting their antenna high in the air. The only unknown that remains is how much YOUR building composition will impact the same loop under a carpet. This is something that only you can investigate. It couldn't take much effort to lay out the antenna and listen to how much you can hear. That would go a great distance in answering this unknown. 73's Richard Clark, KB7QHC |
#7
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In article
, phaedrus wrote: Any suggestions for an antenna type that's discreet (or at least not too outrageous) that gets out well at HF? Anything from 80m through 10m I'll take whatever I can get. Several years ago I was in a second floor apartment with a balcony. Someone had previously bolted a 3/8-24 antenna mirror mount to the balcony rail. I used a 40 Meter Hamstick mobile whip with no additional ground plane or radials. The Kenwood TS-690S had a built-in tuner that seemed to work OK. It didn't get out very well, but I was on the air. I expect it would have worked better on higher bands, probably great on Ten or Six Meters with the appropriate whip. Fred K4DII |
#8
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![]() Quote:
Last edited by 328X1 : February 28th 10 at 05:57 AM Reason: text correction |
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