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61. RE: Topband: FEEDING AN END-FED LONGWIRE (score: 1): Author: "Richard Karlquist" <richard@karlquist.com>; Date: Thu, 11 Mar 2004 08:28:20 -0800; I used to have a 130 foot horizontal wire between two 55 foot towers. I used a simple L-C step up network on the top of one tower to load the wire up as a voltage fed antenna on 80 and 40. It worked; /archives//html/Topband/2004-03/msg00152.html (8,952 bytes)
62. RE: Topband: Erecting irrigation pipe (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Thu, 11 Mar 2004 13:35:39 -0800 (PST); I used a 3 pulley system with the "falling derrick" method to tilt up my 50 ft aluminum tower. I pulled the rope by tying it to the trailer hitch of my van. The method definitely scales up. Rick N6RK; /archives//html/Topband/2004-03/msg00161.html (7,999 bytes)
63. Re: Topband: Long Path Direction! (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 30 Mar 2004 11:38:28 -0800 (PST); What I don't understand is this: if both stations are on the gray line, why would the propagation be better on the long path than the short path? Both paths are 100% in "grayness", ie neither dayligh; /archives//html/Topband/2004-03/msg00338.html (7,957 bytes)
64. RE: [Fwd: Re: Topband: Long Path Direction!] (score: 1): Author: "Richard Karlquist" <richard@karlquist.com>; Date: Wed, 31 Mar 2004 07:34:41 -0800; I used to have 1 wl beverages every 30 degrees, and there was only a few dB difference between the correct beverage and its nearest neighbor. With a 60 degree difference, there was a drastic loss of; /archives//html/Topband/2004-03/msg00348.html (7,917 bytes)
65. Re: Topband: New High-Performance Beverage Pre-amp (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Thu, 15 Apr 2004 11:23:57 -0700 (PDT); Is the IP3 spec referred to input or output? The 1 dB compression spec (+15 dBm) does not make sense in light of the 20 dB gain spec. It implies that you can get +34 dBm out if you put +15 dBm in. +; /archives//html/Topband/2004-04/msg00105.html (7,411 bytes)
66. Re: Topband: 160m Ant on 80m? (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Fri, 16 Apr 2004 13:29:59 -0700 (PDT); I do that with my 90 foot top loaded vertical. Works perfectly. Rick N6RK _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mail; /archives//html/Topband/2004-04/msg00118.html (7,750 bytes)
67. RE: Topband: PSK-31 (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 27 Apr 2004 17:42:41 -0700 (PDT); It is entirely possible to generate PSK signal that has a constant envelope. You simply hold the amplitude constant and rotate the phase 180 degrees, instead of holding the phase constant and rampin; /archives//html/Topband/2004-04/msg00242.html (8,134 bytes)
68. RE: Topband: PSK-31 (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Wed, 28 Apr 2004 15:33:55 -0700 (PDT); You're both right. The RRC filter does limit occupied bandwidth at the transmitter and limits noise bandwidth at the receiver, and does it (as you describe) in a way that does not introduce harmful I; /archives//html/Topband/2004-04/msg00252.html (9,082 bytes)
69. Re: Topband: RX antennas (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Mon, 10 May 2004 16:18:15 -0700 (PDT); I have found that a 40 meter dipole (@60 ft) is very competitive with beverages. I figure this must be because the noise is mainly vertically polarized. I would like to try an array of short dipoles; /archives//html/Topband/2004-05/msg00019.html (9,974 bytes)
70. Re: Topband: RX Loops (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Mon, 17 May 2004 13:59:21 -0700 (PDT); True, but irrelevent. In the far field, (by definition), the electric and magnetic fields are always in a ratio of 377 to 1. Thus it makes no difference which one you sense. Rick N6RK _______________; /archives//html/Topband/2004-05/msg00040.html (7,578 bytes)
71. RE: Topband: 1/2 Mile Super Loop? (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Wed, 9 Jun 2004 19:47:21 -0700; Low horizontally polarized antennas do poorly on 160 meters compared to verticals, in spite of what NEC predicts. Put up four 70' verticals in a 4 square and you'll do much better. Rick N6RK ________; /archives//html/Topband/2004-06/msg00030.html (9,420 bytes)
72. RE: Topband: New way of DXing on Topband (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Sun, 20 Jun 2004 19:13:59 -0700; A DX station recently told me that he received a QSL card from a station "confirming" a QSO at a date and time when the DX station actually worked me. For some funny reason, I actually remembered thi; /archives//html/Topband/2004-06/msg00062.html (10,524 bytes)
73. RE: Topband: New style 1.8MHz antenna (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Sun, 20 Jun 2004 19:38:48 -0700; A patent attorney once told me the correct interpretation of the word "skilled" means someone who merely has ordinary competance in the appropriate area. It doesn't refer to highly skilled experts.; /archives//html/Topband/2004-06/msg00063.html (7,872 bytes)
74. RE: Topband: Analog to Digital converter for 1.8MHz (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Fri, 2 Jul 2004 08:38:35 -0700; You certainly want to bandpass filter the input to get rid of AM BCB signals. Assuming a passband 250 kHz wide and a stopband 500 kHz wide, you only need to sample at 1 MSample/s. (Of course you stil; /archives//html/Topband/2004-07/msg00003.html (9,725 bytes)
75. RE: Topband: Switch for 160 meter antenna (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Wed, 21 Jul 2004 06:49:48 -0700; I have been experimenting for years with my 90 foot vertical with vacuum relays installed across insulators at the 30 and 60 foot level. The reliability problems with the relays are not related to co; /archives//html/Topband/2004-07/msg00038.html (10,507 bytes)
76. RE: Topband: Switch for 160 meter antenna (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Thu, 22 Jul 2004 21:21:55 -0700; I believe I have considered nearly every one of the ideas presented below (except the hardwood boiled in paraffin :-) I even started to build some of the solutions, but ran into various roadblocks. W; /archives//html/Topband/2004-07/msg00048.html (10,858 bytes)
77. Re: Topband: Beverages (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Wed, 25 Aug 2004 10:31:27 -0700 (PDT); I have 3 beverages in a triangle, with switch boxes at the vertices connected to 3 separate coax runs. I can feed any beverage from either end, giving me 6 directions spaced 60 degrees. I will mentio; /archives//html/Topband/2004-08/msg00081.html (8,357 bytes)
78. RE: Topband: Adding radials, a question (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Thu, 2 Sep 2004 08:12:33 -0700; I have observed similar effects to the one's Tom describes. I have a 3ft by 3ft grid of wires forming a 230 ft diameter ground screen. I installed a 40M vertical at the center and connected a signal; /archives//html/Topband/2004-09/msg00004.html (8,653 bytes)
79. RE: Topband: Phased active anntennas on 160m (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 21 Sep 2004 12:23:59 -0700 (PDT); I used to have a 4 element vertical receive array using 30 foot verticals w/o top hats. Although they were guyed, I could have put in more substantial bases and dispensed with the guying. Add a shun; /archives//html/Topband/2004-09/msg00108.html (8,230 bytes)
80. RE: Topband: Antenna Comarisons (score: 1): Author: "Richard (Rick) Karlquist (N6RK)" <richard@karlquist.com>; Date: Mon, 11 Oct 2004 08:32:44 -0700; The tower with 1 radial is probably not omnidirectional. It could easily favor one direction 2 dB at the expense of other directions. Maybe you happened to measure it in a direction where it has 2 dB; /archives//html/Topband/2004-10/msg00049.html (9,667 bytes)

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