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#1
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N0KHQ and some other have recommended to use a Sterba Curtain antenna
designed for 10 m, as an all band antenna for 160 to 10 m. http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=16537 Is this really a good recommendation ? What makes this antenna so good as an all band antenna for 160 to 10 m ? Thanks a lot ! Best 73 de Claude |
#2
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![]() Is this really a good recommendation ? No, not at all. I ran the model and it is less than 10 dbi on ten meters. A 3 ele beam would blow it away. What makes this antenna so good as an all band antenna for 160 to 10 m ? Nothing at all. A random piece of wire will do as well. Rick K2XT |
#3
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On Mon, 20 Jul 2009 08:08:00 +0200, Claude Frantz
wrote: What makes this antenna so good as an all band antenna for 160 to 10 m ? Nothing in particluar. 73's Richard Clark, KB7QHC |
#4
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On Mon, 20 Jul 2009 08:08:00 +0200, Claude Frantz
wrote: N0KHQ and some other have recommended to use a Sterba Curtain antenna designed for 10 m, as an all band antenna for 160 to 10 m. http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=16537 Is this really a good recommendation ? If a yagi or quad is not practical (trees, power lines, expense, etc.) a Sterba curtain is a viable alternative. I use a pair on 6M with one's pattern being N/S and the other's being E/W. One antenna is matched with a HB 6M balanced tuner while a commercial HF balanced tuner does the matching for the other. Depending upon the available room additional bays can be easily added to a Sterba curtain. Like any antenna HAAT matters. Even so I have worked EU with a 5 bay curtain mounted 30 feet up. What makes this antenna so good as an all band antenna for 160 to 10 m ? A 10M Sterba curtain is a 'good' all-band HF antenna because it does work better than no antenna at all. A 10M Sterba curtain will show some directivity on 12M and possibly 15M and 17M as well. Beyond that it becomes more of a random wire. 73 de n4jvp Thanks a lot ! Best 73 de Claude |
#5
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Even so I have worked EU with a 5 bay curtain mounted 30 feet up.
Do you know if you could also have worked EU at the same time if you had, say a 2 element beam on a 4 ft boom? Or even a dipole? Maybe if you had a converted CB vertical your signal into EU would have been 30 db stronger? See my point? Rick K2XT |
#6
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On Tue, 21 Jul 2009 02:16:32 GMT, "Rick" wrote:
Even so I have worked EU with a 5 bay curtain mounted 30 feet up. Do you know if you could also have worked EU at the same time if you had, say a 2 element beam on a 4 ft boom? Or even a dipole? Maybe if you had a converted CB vertical your signal into EU would have been 30 db stronger? What kind of vertical provides 30 dBi? Gain estimates for Sterba curtains are all over the map, 2 dBi per bay is a commonly considered figure. A 5 bay curtain's gain is better than any two element yagi or a single dipole. It may have been possible to work EU with a either the yagi or a dipole but I have neither. See my point? No. There is no place at this QTH where a yagi can be mounted within a hundred feet of the shack. Even with a HB yagi the required coax, mast, rotor, rotor cable, guy supplies etc. represent a substantial expense. Window line, insulators, rope and #14 THHN is a lot less costly. Of course if someone wanted to gift the funds ... hi, My seven-bay curtain was built and hung at 50 feet in less than day with no assistance. I don't believe that can be done from the ground up with a plumber's delight. Wire antennas don't require antenna parties to go up or down. This makes both experimentation and maintenance very easy, My primary HF antenna is a full-wave loop for 160M. This antenna is also fed using a balanced tuner and window line. The loop works well on 6M but lacks the directionality on rx that a curtain provides. With my curtains another benefit is going from NS to EW only takes the flip of a switch. There are situations where a Sterba curtain is a more viable choice than a yagi. In my case even if trees and power lines didn't preclude mounting a rooftop yagi, the landlord might not consent to such an installation. 73 de n4jvp |
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