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#1
January 27th 04, 07:07 AM
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JEFF-UK,
QUESTION - Prior to 'making' your Changes did you do any Reception Testing and Record your Results ? FWIW - Our Memories are "Poor-Recorders-of-the-Facts: When it comes to all the 'factors' that make-up the Ojective Evidence and Subjective Judgements like a Radio Broadcaster's Signal Strength and the Background Noise Level {Signal-to-Noise Ratio} of a Shortwave Band. * Now multiply this by five to ten Broadcasters per SW Band. * Then multiply this by five to ten SW Bands. You now have 50 to 200 Observations to Memorize or Record. I 'favor' the "Write-It-Down" Method. Read Message # 556 Your ANTENNAS Journal-Ledger and Understanding the Shortwave Bands http://groups.yahoo.com/group/SWL-AM...na/message/556 Read Message # 88 Hooking-Up a "Balun" [Matching Transformer] to a Random Wire Antenna http://groups.yahoo.com/group/SWL-AM...nna/message/88 More Balun (Matching Transfromer Reading: * MLB Theory http://groups.yahoo.com/group/SWL-AM...na/message/340 * Magnetic Longwire Balun (MLB) - Help ! http://groups.yahoo.com/group/SWL-AM...na/message/173 * Magnetic Longwire Balun (MLB) - Build Your Own "DIY" http://groups.yahoo.com/group/SWL-AM...na/message/177 * Balun / Matching Transformer Reading List ( Long 43 Links ) http://groups.yahoo.com/group/SWL-AM...na/message/337 iane ~ RHF .. Some Say: On A Clear Day You Can See Forever. http://groups.yahoo.com/group/SWL-AM...na/message/502 I BELIEVE: On A Clear Night... You Can Hear Forever and Beyond ! .. .. = = = "JEFF UK" = = = wrote in message ... Hi. Further to my last post............ This weekend i messed about with my long wire receiving ( only ) antenna. ( Length 20Mtrs, coax fed , earthed 10 mtrs from house). Yesterday i built a 9:1 balun / transformer. Placed it at my earth rod out side. I am not even sure if this is the right one for a long wire ? Anyway.. reception on 20 mtrs now has much less noise now. The signal to noise ratio has vastly improved. Reception on other bands remains about the same as before i added the balun. (I used my Wellbrook loop antenna to compare signals.) My question now is... How do improve reception/noise on other bands ? Do i need a different balun or change the length of my wire ? What ever i have done seems to of peaked on 20mts ( 14Mhz). It would be great to get rid of the noise on 80mtrs for example. Any ideas or diagrams appreciated. Interesting stuff this ! Regards Jeff .. |
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#2
January 27th 04, 07:10 AM
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No. I just know 20 mtrs is very noisy here.
Now its much better on a signal to noise ratio. Every thing appears to be the same signal strengh on know frequencies. Cheers Jeff "RHF" wrote in message m... JEFF-UK, QUESTION - Prior to 'making' your Changes did you do any Reception Testing and Record your Results ? FWIW - Our Memories are "Poor-Recorders-of-the-Facts: When it comes to all the 'factors' that make-up the Ojective Evidence and Subjective Judgements like a Radio Broadcaster's Signal Strength and the Background Noise Level {Signal-to-Noise Ratio} of a Shortwave Band. * Now multiply this by five to ten Broadcasters per SW Band. * Then multiply this by five to ten SW Bands. You now have 50 to 200 Observations to Memorize or Record. I 'favor' the "Write-It-Down" Method. Read Message # 556 Your ANTENNAS Journal-Ledger and Understanding the Shortwave Bands http://groups.yahoo.com/group/SWL-AM...na/message/556 Read Message # 88 Hooking-Up a "Balun" [Matching Transformer] to a Random Wire Antenna http://groups.yahoo.com/group/SWL-AM...nna/message/88 More Balun (Matching Transfromer Reading: * MLB Theory http://groups.yahoo.com/group/SWL-AM...na/message/340 * Magnetic Longwire Balun (MLB) - Help ! http://groups.yahoo.com/group/SWL-AM...na/message/173 * Magnetic Longwire Balun (MLB) - Build Your Own "DIY" http://groups.yahoo.com/group/SWL-AM...na/message/177 * Balun / Matching Transformer Reading List ( Long 43 Links ) http://groups.yahoo.com/group/SWL-AM...na/message/337 iane ~ RHF . Some Say: On A Clear Day You Can See Forever. http://groups.yahoo.com/group/SWL-AM...na/message/502 I BELIEVE: On A Clear Night... You Can Hear Forever and Beyond ! . . = = = "JEFF UK" = = = wrote in message ... Hi. Further to my last post............ This weekend i messed about with my long wire receiving ( only ) antenna. ( Length 20Mtrs, coax fed , earthed 10 mtrs from house). Yesterday i built a 9:1 balun / transformer. Placed it at my earth rod out side. I am not even sure if this is the right one for a long wire ? Anyway.. reception on 20 mtrs now has much less noise now. The signal to noise ratio has vastly improved. Reception on other bands remains about the same as before i added the balun. (I used my Wellbrook loop antenna to compare signals.) My question now is... How do improve reception/noise on other bands ? Do i need a different balun or change the length of my wire ? What ever i have done seems to of peaked on 20mts ( 14Mhz). It would be great to get rid of the noise on 80mtrs for example. Any ideas or diagrams appreciated. Interesting stuff this ! Regards Jeff . |
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#3
January 27th 04, 03:14 PM
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JEFF-UK,
WHAT TO DO: Select from three to five strong International Broadcast Stations on Each Band: 120M, 90M, 75M, 60M, 49M, 41M, 31M, 25M, 22M, 19M, 16M, 13M, and 11M. * Record your S-Meter readings for these Stations and Time of Day/Night. * De-Tune by 5-15 kHz to a 'dead-spot' on the band and also record your Background Noise Level for the Band near each of these Stations. iane ~ RHF .. .. = = = "JEFF UK" = = = wrote in message ... No. I just know 20 mtrs is very noisy here. Now its much better on a signal to noise ratio. Every thing appears to be the same signal strengh on know frequencies. Cheers Jeff "RHF" wrote in message m... JEFF-UK, QUESTION - Prior to 'making' your Changes did you do any Reception Testing and Record your Results ? FWIW - Our Memories are "Poor-Recorders-of-the-Facts: When it comes to all the 'factors' that make-up the Ojective Evidence and Subjective Judgements like a Radio Broadcaster's Signal Strength and the Background Noise Level {Signal-to-Noise Ratio} of a Shortwave Band. * Now multiply this by five to ten Broadcasters per SW Band. * Then multiply this by five to ten SW Bands. You now have 50 to 200 Observations to Memorize or Record. I 'favor' the "Write-It-Down" Method. Read Message # 556 Your ANTENNAS Journal-Ledger and Understanding the Shortwave Bands http://groups.yahoo.com/group/SWL-AM...na/message/556 Read Message # 88 Hooking-Up a "Balun" [Matching Transformer] to a Random Wire Antenna http://groups.yahoo.com/group/SWL-AM...nna/message/88 More Balun (Matching Transfromer Reading: * MLB Theory http://groups.yahoo.com/group/SWL-AM...na/message/340 * Magnetic Longwire Balun (MLB) - Help ! http://groups.yahoo.com/group/SWL-AM...na/message/173 * Magnetic Longwire Balun (MLB) - Build Your Own "DIY" http://groups.yahoo.com/group/SWL-AM...na/message/177 * Balun / Matching Transformer Reading List ( Long 43 Links ) http://groups.yahoo.com/group/SWL-AM...na/message/337 iane ~ RHF . Some Say: On A Clear Day You Can See Forever. http://groups.yahoo.com/group/SWL-AM...na/message/502 I BELIEVE: On A Clear Night... You Can Hear Forever and Beyond ! . . = = = "JEFF UK" = = = wrote in message ... Hi. Further to my last post............ This weekend i messed about with my long wire receiving ( only ) antenna. ( Length 20Mtrs, coax fed , earthed 10 mtrs from house). Yesterday i built a 9:1 balun / transformer. Placed it at my earth rod out side. I am not even sure if this is the right one for a long wire ? Anyway.. reception on 20 mtrs now has much less noise now. The signal to noise ratio has vastly improved. Reception on other bands remains about the same as before i added the balun. (I used my Wellbrook loop antenna to compare signals.) My question now is... How do improve reception/noise on other bands ? Do i need a different balun or change the length of my wire ? What ever i have done seems to of peaked on 20mts ( 14Mhz). It would be great to get rid of the noise on 80mtrs for example. Any ideas or diagrams appreciated. Interesting stuff this ! Regards Jeff . |
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#4
January 27th 04, 09:50 PM
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will do
Jeff "RHF" wrote in message m... JEFF-UK, WHAT TO DO: Select from three to five strong International Broadcast Stations on Each Band: 120M, 90M, 75M, 60M, 49M, 41M, 31M, 25M, 22M, 19M, 16M, 13M, and 11M. * Record your S-Meter readings for these Stations and Time of Day/Night. * De-Tune by 5-15 kHz to a 'dead-spot' on the band and also record your Background Noise Level for the Band near each of these Stations. iane ~ RHF . . = = = "JEFF UK" = = = wrote in message ... No. I just know 20 mtrs is very noisy here. Now its much better on a signal to noise ratio. Every thing appears to be the same signal strengh on know frequencies. Cheers Jeff "RHF" wrote in message m... JEFF-UK, QUESTION - Prior to 'making' your Changes did you do any Reception Testing and Record your Results ? FWIW - Our Memories are "Poor-Recorders-of-the-Facts: When it comes to all the 'factors' that make-up the Ojective Evidence and Subjective Judgements like a Radio Broadcaster's Signal Strength and the Background Noise Level {Signal-to-Noise Ratio} of a Shortwave Band. * Now multiply this by five to ten Broadcasters per SW Band. * Then multiply this by five to ten SW Bands. You now have 50 to 200 Observations to Memorize or Record. I 'favor' the "Write-It-Down" Method. Read Message # 556 Your ANTENNAS Journal-Ledger and Understanding the Shortwave Bands http://groups.yahoo.com/group/SWL-AM...na/message/556 Read Message # 88 Hooking-Up a "Balun" [Matching Transformer] to a Random Wire Antenna http://groups.yahoo.com/group/SWL-AM...nna/message/88 More Balun (Matching Transfromer Reading: * MLB Theory http://groups.yahoo.com/group/SWL-AM...na/message/340 * Magnetic Longwire Balun (MLB) - Help ! http://groups.yahoo.com/group/SWL-AM...na/message/173 * Magnetic Longwire Balun (MLB) - Build Your Own "DIY" http://groups.yahoo.com/group/SWL-AM...na/message/177 * Balun / Matching Transformer Reading List ( Long 43 Links ) http://groups.yahoo.com/group/SWL-AM...na/message/337 iane ~ RHF . Some Say: On A Clear Day You Can See Forever. http://groups.yahoo.com/group/SWL-AM...na/message/502 I BELIEVE: On A Clear Night... You Can Hear Forever and Beyond ! . . = = = "JEFF UK" = = = wrote in message ... Hi. Further to my last post............ This weekend i messed about with my long wire receiving ( only ) antenna. ( Length 20Mtrs, coax fed , earthed 10 mtrs from house). Yesterday i built a 9:1 balun / transformer. Placed it at my earth rod out side. I am not even sure if this is the right one for a long wire ? Anyway.. reception on 20 mtrs now has much less noise now. The signal to noise ratio has vastly improved. Reception on other bands remains about the same as before i added the balun. (I used my Wellbrook loop antenna to compare signals.) My question now is... How do improve reception/noise on other bands ? Do i need a different balun or change the length of my wire ? What ever i have done seems to of peaked on 20mts ( 14Mhz). It would be great to get rid of the noise on 80mtrs for example. Any ideas or diagrams appreciated. Interesting stuff this ! Regards Jeff . |
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