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#1
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I must be doing something right because we had another power outage
last night, or early this morning from 1:00AM until 3:00AM. I had restrung a 50' random wire antenna from the WR LWA-0130 Long Wire Antenna Adapter mounted under the eves to a fiber glass pole tied to a fence post. I compared three antennas, a Lankford "Simplified Complimentary Antenna', the same antenna with a built in Lankford "Norton RF amp" and the LWZ-0130. After a few tests I dropped the active with the built in Norton RF amp. Simply put, there is still too much background noise to make the amp useful. I A/B tested the other 2 from CB, 27.035 had a nice distance conversation, down to 100KHz Loran C. As expected the Lankford "Simplified Complimentary Antenna' was the winner. At every frequency the signals were cleaner on the Lankford antenna, though in many cases the difference was just noticeable. At 3:03AM when the AC came back on, the LWA-0130 and 50' random wire antenna became nearly useless. The QRM jumped up to at least S3 up to 15MHz on the LWA-0130. The noise increased on the Lankford active antenna rose as well, but never reached S1. As I thought, if one lives in a remote RFquite area the typical random wire antenna is clearly a worthwhile antenna. In built up and noisy areas it's utility decrease. I admit that I need to mount the LWA-0130 at least 50' from our home, but that isn't practical right now. Terry |
#2
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On Jan 1, 9:16 am, wrote:
I must be doing something right because we had another power outage last night, or early this morning from 1:00AM until 3:00AM. I had restrung a 50' random wire antenna from the WR LWA-0130 Long Wire Antenna Adapter mounted under the eves to a fiber glass pole tied to a fence post. I compared three antennas, a Lankford "Simplified Complimentary Antenna', the same antenna with a built in Lankford "Norton RF amp" and the LWZ-0130. After a few tests I dropped the active with the built in Norton RF amp. Simply put, there is still too much background noise to make the amp useful. I A/B tested the other 2 from CB, 27.035 had a nice distance conversation, down to 100KHz Loran C. As expected the Lankford "Simplified Complimentary Antenna' was the winner. At every frequency the signals were cleaner on the Lankford antenna, though in many cases the difference was just noticeable. At 3:03AM when the AC came back on, the LWA-0130 and 50' random wire antenna became nearly useless. The QRM jumped up to at least S3 up to 15MHz on the LWA-0130. The noise increased on the Lankford active antenna rose as well, but never reached S1. As I thought, if one lives in a remote RFquite area the typical random wire antenna is clearly a worthwhile antenna. In built up and noisy areas it's utility decrease. I admit that I need to mount the LWA-0130 at least 50' from our home, but that isn't practical right now. Terry Loop antennas are better at rejecting man made noise. I think I've plugged Wellbrook too much already on the group, but their products are the way to go for urban environments. But even in the boonies, my ala100 and homemade loop worked better than about 80ft of wire and the palomar magnetic balun. The advantage to the loop is you can rotate it to null the noise source if the frequency is relatively low. Certainly for MW and lower. |
#3
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On Jan 1, 8:26 pm, wrote:
On Jan 1, 9:16 am, wrote: I must be doing something right because we had another power outage last night, or early this morning from 1:00AM until 3:00AM. I had restrung a 50' random wire antenna from the WR LWA-0130 Long Wire Antenna Adapter mounted under the eves to a fiber glass pole tied to a fence post. I compared three antennas, a Lankford "Simplified Complimentary Antenna', the same antenna with a built in Lankford "Norton RF amp" and the LWZ-0130. After a few tests I dropped the active with the built in Norton RF amp. Simply put, there is still too much background noise to make the amp useful. I A/B tested the other 2 from CB, 27.035 had a nice distance conversation, down to 100KHz Loran C. As expected the Lankford "Simplified Complimentary Antenna' was the winner. At every frequency the signals were cleaner on the Lankford antenna, though in many cases the difference was just noticeable. At 3:03AM when the AC came back on, the LWA-0130 and 50' random wire antenna became nearly useless. The QRM jumped up to at least S3 up to 15MHz on the LWA-0130. The noise increased on the Lankford active antenna rose as well, but never reached S1. As I thought, if one lives in a remote RFquite area the typical random wire antenna is clearly a worthwhile antenna. In built up and noisy areas it's utility decrease. I admit that I need to mount the LWA-0130 at least 50' from our home, but that isn't practical right now. Terry Loop antennas are better at rejecting man made noise. I think I've plugged Wellbrook too much already on the group, but their products are the way to go for urban environments. But even in the boonies, my ala100 and homemade loop worked better than about 80ft of wire and the palomar magnetic balun. The advantage to the loop is you can rotate it to null the noise source if the frequency is relatively low. Certainly for MW and lower. I owned a Wellbrok ALA1530 for several weeks and found it to be inferior to a active dipole in terms of beam width and ability to operate within a strong MW environment. I live within 3 miles of 2 MW stations that give any device with active components a work out. I found the WL1030 to be at least the equal of, and frequently better then the ALA1530. Both were inferior to the active dipole. I wanted to test my hypothesis that in very quiet, low RF noise, locations, the type of antenna was not of extreme importance. I think I have verified that the worst your environment, the more balanced and antenna must be. Balance, in general, reflects the ability to be easily isolated from the RF common mode noise generated in almost every modern home. No noise means 'anything' goes. Within reason. If you are a fan of loops I urge you to check the WL1030 web page. PCBs are no longer available, but even with SMC it can be built with minimum trouble. The only disagreement I have with the guys at the WL1030 site is their insistence up the need for a hard to get Litz wire for the loop. It might make a difference at LF but I really couldn't tell the difference between Litz, solid or stranded copper wire. To steer the beam I use a 'phaser'. I can get slightly better results with a horizontal active dipole, but that requires a rotator. With a phaser all I need to do is to turn a switch then a pot. Life is GOOD. We have been told they will have to kill the power for up to an hour at 5:00PM. Getting kind of chilly around here....But I am testing my theory by running an antenna straight a 20' fiber glass rod/pole through the window to the receiver. No external matching transformer and no coax in the system. I suspect it will work very well as long as the power is off. I will report the results either this evening or Monday. If the power is off very long and the temps drop as fast as I expect I may have to fire up a genset and then all DXing is over. Terry |
#4
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On Jan 1, 9:16*am, wrote:
I must be doing something right because we had another power outage last night, or early this morning from 1:00AM until 3:00AM. I had restrung a 50' random wire antenna from the WR LWA-0130 Long Wire Antenna Adapter mounted under the eves to a fiber glass pole tied to a fence post. I compared three antennas, a Lankford "Simplified Complimentary Antenna', the same antenna with a built in Lankford "Norton RF amp" and the LWZ-0130. After a few tests I dropped the active with the built in Norton RF amp. Simply put, there is still too much background noise to make the amp useful. I A/B tested the other 2 from CB, 27.035 had a nice distance conversation, down to 100KHz Loran *C. As expected the Lankford "Simplified Complimentary Antenna' was the winner. At every frequency the signals were cleaner on the Lankford antenna, though in many cases the difference was just noticeable. At 3:03AM when the AC came back on, the LWA-0130 and 50' random wire antenna became nearly useless. The QRM jumped up to at least S3 up to 15MHz on the LWA-0130. The noise increased on the Lankford active antenna rose as well, but never reached S1. As I thought, if one lives in a remote RFquite area the typical random wire antenna is clearly a worthwhile antenna. In built up and noisy areas it's utility decrease. I admit that I need to mount the LWA-0130 at least 50' from our home, but that isn't practical right now. Terry Terry, All Those Dallas Lankford Designed Active Antennas . . . Need a Guide to What-is-What. A = Lankford "Simplified Complimentary Antenna" (SCA) B = Lankford SCA with a built in Lankford "Norton RF Amp" 1 - Lankford redesigned PA0RDT micro-whip with a base mounted Lankford amplifier ? ? ? 2 - Dallas Lankford "Simplified Complimentary Antenna" (SCA) Push-Pull Output Active Whip Antenna -by- Dallas Lankford - 12 DEC 2007 DL-SCA [TINY-URL*] - http://tinyurl.com/34qbf2 * For this very long Link/URL : http://www.kongsfjord.no/dl/Antennas...ennas%20II.pdf 3 - Lankford Micro Active Antenna ? ? ? 4 - Dallas Lankford's Simpler Active Dipoles {Antennas} http://www.kongsfjord.no/ -&- http://www.kongsfjord.no/dl/ Low Noise Active Antennas AC/DC Power Supplies (PS) -by- Dallas Lankford - 17 FEB 2007 DL-PS [TINY-URL*] - http://tinyurl.com/2va2a6 * For this very long Link/URL : http://www.kongsfjord.no/dl/Antennas...plies%20II.pdf -Note- Page # 3 Has a "Info" on more new Active Whip & Dipole Antennas 5 - Stock PAORDT Mini-Antenna http://www.kongsfjord.no/dl/Antennas...20Antennas.pdf 6 - Dallas Lankford - LW-MW-SW "Relay Tuned" Fifteen Foot (15') Noise Reducing Vertical Antenna DL-15V [TINY-URL*] - http://tinyurl.com/2ncu3n * For this very long Link/URL : http://www.kongsfjord.no/dl/Antennas...%20Antenna.pdf This Lankford 15' Relay Switched Antenna. It is elevated* with a set of 16 15' elevated radials. * Mounted about 3' (1M) above the ground. CopyRight © Dallas Lankford - All Rights Reserved. |
#5
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On Jan 1, 11:37*pm, RHF wrote:
On Jan 1, 9:16*am, wrote: I must be doing something right because we had another power outage last night, or early this morning from 1:00AM until 3:00AM. I had restrung a 50' random wire antenna from the WR LWA-0130 Long Wire Antenna Adapter mounted under the eves to a fiber glass pole tied to a fence post. I compared three antennas, a Lankford "Simplified Complimentary Antenna', the same antenna with a built in Lankford "Norton RF amp" and the LWZ-0130. After a few tests I dropped the active with the built in Norton RF amp. Simply put, there is still too much background noise to make the amp useful. I A/B tested the other 2 from CB, 27.035 had a nice distance conversation, down to 100KHz Loran *C. As expected the Lankford "Simplified Complimentary Antenna' was the winner. At every frequency the signals were cleaner on the Lankford antenna, though in many cases the difference was just noticeable. At 3:03AM when the AC came back on, the LWA-0130 and 50' random wire antenna became nearly useless. The QRM jumped up to at least S3 up to 15MHz on the LWA-0130. The noise increased on the Lankford active antenna rose as well, but never reached S1. As I thought, if one lives in a remote RFquite area the typical random wire antenna is clearly a worthwhile antenna. In built up and noisy areas it's utility decrease. I admit that I need to mount the LWA-0130 at least 50' from our home, but that isn't practical right now. Terry Terry, All Those Dallas Lankford Designed Active Antennas . . . Need a Guide to What-is-What. A = Lankford "Simplified Complimentary Antenna" (SCA) B = Lankford SCA with a built in Lankford "Norton RF Amp" 1 - Lankford redesigned PA0RDT micro-whip with a base mounted Lankford amplifier ? ? ? 2 - *Dallas Lankford "Simplified Complimentary Antenna" (SCA) Push-Pull Output Active Whip Antenna -by- Dallas Lankford - 12 DEC 2007 DL-SCA [TINY-URL*] -http://tinyurl.com/34qbf2 * For this very long Link/URL :http://www.kongsfjord.no/dl/Antennas...ementary%20Pus... 3 - Lankford Micro Active Antenna ? ? ? 4 - Dallas Lankford's Simpler Active Dipoles {Antennas}http://www.kongsfjord.no/-&-http://w...gsfjord.no/dl/ Low Noise Active Antennas AC/DC Power Supplies (PS) -by- Dallas Lankford - 17 FEB 2007 DL-PS [TINY-URL*] -http://tinyurl.com/2va2a6 * For this very long Link/URL :http://www.kongsfjord.no/dl/Antennas...ve%20Antennas%... -Note- Page # 3 Has a "Info" on more new Active Whip & Dipole Antennas 5 - Stock PAORDT Mini-Antennahttp://www.kongsfjord.no/dl/Antennas/Simplified%20Complementary%20Pus... 6 - Dallas Lankford - LW-MW-SW "Relay Tuned" Fifteen Foot (15') Noise Reducing Vertical Antenna DL-15V [TINY-URL*] -http://tinyurl.com/2ncu3n * For this very long Link/URL :http://www.kongsfjord.no/dl/Antennas...20Tuned%20Nois... This Lankford 15' Relay Switched Antenna. It is elevated* with a set of 16 15' elevated radials. * Mounted about 3' (1M) above the ground. CopyRight © Dallas Lankford - All Rights Reserved. *. *. Kongsfjord - 70°43'N 29°21'E -Main WebPage- Welcome to the KONG DX-Pedition WebPages. KONGSFJORD -http://www.kongsfjord.no/ CopyRight ©www.kongsfjord.noAll Rights Reserved. *. *. The Dallas Files {-aka- Dallas Lankford Files}http://www.kongsfjord.no/dl/dl.htm All Articles on these WebPages are CopyRight © by Dallas Lankfordhttp://www.kongsfjord.no/dl/Dallas%20n%20Muffy%204-05.JPG Collection of Useful Modifications and Projects -by- Dallas Lankford -hosted by- Kongsfjord.No website -Note- These Files are in the "PDF" format and require the use of Acrobat Reader 5.0 or higher to View and Print them properly. *. *. Antennas and Pre-Amplifiers -by- Dallas Lankford -hosted by- Kongsfjord.No websitehttp://www.kongsfjord.no/dl/dl.htm#Antennasand preamplifiers CopyRight © Dallas Lankford - All Rights Reserved. -Note- These Files are in the "PDF" format and require the use of Acrobat Reader 5.0 or higher to View and Print them properly. List of these Dallas Lankford Antennas and Pre-Amplifiers Files : * Close Spaced Phased MW Verticals * Common Base Transformer Feedback Norton Amplifiers * IIP2 Adjustments For Active Whip Antennas with FET Gate Bias Adjustment NEW ! * Loop Antenna Sensitivty * Low Noise Active Antenna AC/DC Power Supplies * LW-MW-SW Relay Tuned 15' Noise Reducing Vertical Antenna * Measurements of Some Antennas Signal to Man Made Noise Ratios * MW And LW Noise Reducing Antennas *UPDATED ! * MW Filter # 3 * Simplified Complementary Push-Pull Output Active Whip Antennas UPDATED ! * Some of My Favorite Small Antennas for MW and LW * SW Filter # 2 * Variations Of Misek's Center Fed Micro SWA *. *. FWIW - Dallas Lankford resides in Ruston, Louisiana -USA-http://www.kongsfjord.no/dl/Dallas%20n%20Muffy%204-05.JPG Ruston is along the I-20 between Shereveport and Monroe in less-south {northern} Louisiana. *. *. needed a guide to track all the antenna references ~ RHF *.- Hide quoted text - - Show quoted text - Simplifying the Dallas Lankford "Relay Tuned" Fifteen Foot (15') Noise Reducing Vertical Antenna for Shortwave Listening (SWL) Only WRT - # 6 - Dallas Lankford - LW-MW-SW "Relay Tuned" Fifteen Foot (15') Noise Reducing Vertical Antenna DL-15V [TINY-URL*] - http://tinyurl.com/2ncu3n * For this very long Link/URL : http://www.kongsfjord.no/dl/Antennas...%20Antenna.pdf CopyRight © Dallas Lankford - All Rights Reserved. This is basically a Dual-Band "Relay Switched" Passive {meaning Non-Amplified} Vertical Antenna using a Matching Transformer; Ground Rod; and Line Isolator. If you did not want the AM/MW Band and Longwave Band coverage; and are 'only' Interested in the Shortwave Bands between 3 MHz ~ 18 MHz : A 'non-relay' Single Band Passive Vertical Antenna would be simpler choice. 100% PASSIVE : +No Relay +No DC Power Required The Original Lankford : For the 8 MHz ~ 30 MHz High Shortwave Band this Antenna uses a 4T to 10T (1:6) Matching Transformer at the Base of the 15-Foot Vertical Antenna mounted on a 4~8 Foot Ground Rod. Plus a 4T to 4T (1:1) Matching Transformer as a Line Isolator. MODIFIED : For General 'Middle' Shortwave Radio Bands : 60 Meters - 4400~5100 kHz 49 Meters - 5800~6300 kHz 41 Meters - 7100~7600 kHz 31 Meters - 9250~9995 kHz 25 Meters - 11.50~12.16 MHz 22 Meters - 13.57~13.87 MHz 19 Meters -15.00~15.825 MHz For a 4.4 MHz ~ 15.9 MHz Shortwave Band coverage this Antenna would use a 8T to 20T {-or- 7T to 18T} (1:6) Matching Transformer at the Base of the 15-Foot Vertical Antenna mounted on a 4~8 Foot Ground Rod. Plus a 8T to 8T (1:1) Matching Transformer as a Line Isolator. Antenna Side-by-Side : The Lankford Vertical -v- The Doty Inverted "L" It would be interesting to build one and run it along-side a "Doty" Low Noise Inverted "L" Antenna using a 10T to 30T (1:9) Matching Transformer at the Base of the 15-Foot Vertical-Up-Leg mounted on a 4~8 Foot Ground Rod with a 30~45 Foot Horizontal-Out-Arm. Plus a 10T to 10T (1:1) Matching Transformer as a Line Isolator. -Note- Separating both Bases of the Antennas by 30-Feet or more. iane ~ RHF |
#6
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On Jan 1, 12:45 pm, wrote:
On Jan 1, 8:26 pm, wrote: On Jan 1, 9:16 am, wrote: I must be doing something right because we had another power outage last night, or early this morning from 1:00AM until 3:00AM. I had restrung a 50' random wire antenna from the WR LWA-0130 Long Wire Antenna Adapter mounted under the eves to a fiber glass pole tied to a fence post. I compared three antennas, a Lankford "Simplified Complimentary Antenna', the same antenna with a built in Lankford "Norton RF amp" and the LWZ-0130. After a few tests I dropped the active with the built in Norton RF amp. Simply put, there is still too much background noise to make the amp useful. I A/B tested the other 2 from CB, 27.035 had a nice distance conversation, down to 100KHz Loran C. As expected the Lankford "Simplified Complimentary Antenna' was the winner. At every frequency the signals were cleaner on the Lankford antenna, though in many cases the difference was just noticeable. At 3:03AM when the AC came back on, the LWA-0130 and 50' random wire antenna became nearly useless. The QRM jumped up to at least S3 up to 15MHz on the LWA-0130. The noise increased on the Lankford active antenna rose as well, but never reached S1. As I thought, if one lives in a remote RFquite area the typical random wire antenna is clearly a worthwhile antenna. In built up and noisy areas it's utility decrease. I admit that I need to mount the LWA-0130 at least 50' from our home, but that isn't practical right now. Terry Loop antennas are better at rejecting man made noise. I think I've plugged Wellbrook too much already on the group, but their products are the way to go for urban environments. But even in the boonies, my ala100 and homemade loop worked better than about 80ft of wire and the palomar magnetic balun. The advantage to the loop is you can rotate it to null the noise source if the frequency is relatively low. Certainly for MW and lower. I owned a Wellbrok ALA1530 for several weeks and found it to be inferior to a active dipole in terms of beam width and ability to operate within a strong MW environment. I live within 3 miles of 2 MW stations that give any device with active components a work out. I found the WL1030 to be at least the equal of, and frequently better then the ALA1530. Both were inferior to the active dipole. I wanted to test my hypothesis that in very quiet, low RF noise, locations, the type of antenna was not of extreme importance. I think I have verified that the worst your environment, the more balanced and antenna must be. Balance, in general, reflects the ability to be easily isolated from the RF common mode noise generated in almost every modern home. No noise means 'anything' goes. Within reason. If you are a fan of loops I urge you to check the WL1030 web page. PCBs are no longer available, but even with SMC it can be built with minimum trouble. The only disagreement I have with the guys at the WL1030 site is their insistence up the need for a hard to get Litz wire for the loop. It might make a difference at LF but I really couldn't tell the difference between Litz, solid or stranded copper wire. To steer the beam I use a 'phaser'. I can get slightly better results with a horizontal active dipole, but that requires a rotator. With a phaser all I need to do is to turn a switch then a pot. Life is GOOD. We have been told they will have to kill the power for up to an hour at 5:00PM. Getting kind of chilly around here....But I am testing my theory by running an antenna straight a 20' fiber glass rod/pole through the window to the receiver. No external matching transformer and no coax in the system. I suspect it will work very well as long as the power is off. I will report the results either this evening or Monday. If the power is off very long and the temps drop as fast as I expect I may have to fire up a genset and then all DXing is over. Terry I have the ALA100. No problems whatsoever. No need to fiddle with antennas, though I do design different portable loops for use in the field. [In the boonies, more is more.] I have no problem with overload with the ALA100. I am within 5 miles of a 50KW MW radio station. |
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