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1. Topband: Parasitic vertical director? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Tue, 27 Dec 2011 19:38:10 -0500; I don't have a lot of room for antennas on my antenna restricted lot. After doing some reading on larger antenna farms I thought that a parasitic director added to my toploaded vertical might afford; /archives//html/Topband/2011-12/msg00555.html (7,206 bytes)
2. Topband: Open coil traps? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Thu, 28 Jun 2012 11:42:02 -0400; I've been looking for info on trap construction for a trap dipole that doesn't use coiled coax construction. I haven't had a lot of success. Are there issues (other than cost) with coil/capacitor con; /archives//html/Topband/2012-06/msg00240.html (6,490 bytes)
3. Topband: Reversible BOG? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Fri, 11 Jan 2013 17:33:34 -0500; I'm putting in reversible Beverages to give me better reception on 80, 40 and 160m. I realize both of them are likely too short for great 160m performance but it's the best I can do with my limited l; /archives//html/Topband/2013-01/msg00078.html (6,922 bytes)
4. Re: Topband: Reversible BOG? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Sat, 12 Jan 2013 00:17:17 -0500; As a follow up I wonder if rather than using windowline, whose transmission line performance would be subject to variations in weather, it might be better to use coax. The outside of the shield would; /archives//html/Topband/2013-01/msg00081.html (6,609 bytes)
5. Re: Topband: Reversible BOG? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Sun, 13 Jan 2013 12:55:55 -0500; Several have replied that the antenna is shown in ON4UN's book. I don't know how I missed it but I certainly did. I've now read that section of the book several times and am planning some experiments; /archives//html/Topband/2013-01/msg00099.html (7,519 bytes)
6. Topband: JT65 to EU? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Mon, 10 Nov 2014 21:12:41 -0500; I'm about half way to DXCC on 160 and looking for any way to move the needle. Most of my EU 160 has been CW but I've been wondering if any have had luck using WSJT modes either JT65 or JT9. If so is; /archives//html/Topband/2014-11/msg00039.html (6,436 bytes)
7. Re: Topband: JT65 to EU? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Tue, 11 Nov 2014 08:23:26 -0500; Hi Brian Thanks for the quick reply! Has it been mostly JT65 or have you seen JT9 in use? Thanks again Jim ab3cv On Tue, Nov 11, 2014 at 5:33 AM, Brian Duffell <topband@planet3.freeuk.co.uk _________; /archives//html/Topband/2014-11/msg00045.html (8,315 bytes)
8. Topband: 160m RX antenna testing surrogates? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Sat, 20 Dec 2014 12:32:28 -0500; Here in the US we have the AM broadcast band which I assume other countries can use as 160m testing surrogates to some degree. Are there other DX broadcasters either just above or below 160m that I c; /archives//html/Topband/2014-12/msg00346.html (7,065 bytes)
9. Topband: Beacons? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Sun, 13 Sep 2015 21:29:41 -0400; This is a bit of a newb question but here goes. I've used the beacons on 20m and upwards and found them to be helpful. Is there a reason they don't exist on 40, 80 and 160? Perhaps regulatory? Fundin; /archives//html/Topband/2015-09/msg00076.html (6,378 bytes)
10. Topband: Inverted L off tower? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Mon, 16 May 2016 19:40:59 -0400; One of my friends is thinking about installing a 70 ft. tower with a 2-element shortened 40M yagi. He is thinking about installing the new tower in a location where he now has a vertical used for 80M; /archives//html/Topband/2016-05/msg00036.html (6,847 bytes)
11. Re: Topband: Inverted L off tower? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Mon, 23 May 2016 10:34:34 -0400; Thanks for all the feedback and suggestions. My friend (not me...) is considering his options. 73 jim ab3cv _________________ Topband Reflector Archives - http://www.contesting.com/_topband; /archives//html/Topband/2016-05/msg00044.html (8,306 bytes)
12. Topband: Voltage at top of vertical and scaling? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Tue, 16 Apr 2019 08:38:03 -0400; Is there any data on what the voltage might be at the top of a full size 80m vertical at 1500w input? Is there some zener like ionization at the top that limits the voltage? If so is there a way to e; /archives//html/Topband/2019-04/msg00063.html (6,658 bytes)
13. Re: Topband: Voltage at top of vertical and scaling? (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Tue, 16 Apr 2019 20:22:12 -0400; Thanks all for your help on this. It sounds like my 15Kv relay at 53ft on the 68ft vertical is safe. It's never hot switched and provides connection to a 160 "tail" to give me my inverted L there. Be; /archives//html/Topband/2019-04/msg00069.html (9,688 bytes)
14. Topband: Testing FST4 on 160m (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Mon, 8 Feb 2021 19:51:44 -0500; I've been looking at FST4 as a possibility for getting some more difficult new ones on 160. https://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main-2.4.0-rc1.html#SLOW_MODES you can see th; /archives//html/Topband/2021-02/msg00040.html (6,975 bytes)
15. Re: Topband: Testing FST4 on 160m (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Tue, 9 Feb 2021 12:53:30 -0500; I'll post any skeds for others to participate as well. stay safe! jim ab3cv _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector; /archives//html/Topband/2021-02/msg00044.html (8,014 bytes)
16. Re: Topband: Testing FST4 on 160m (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Tue, 9 Feb 2021 13:09:51 -0500; First test Feb 10, 0100z, Dial freq 1837.5. DF1500 FST4-60 for a fine tone freq of 1839. R7LV on the other end. I know this is too early for W6/7 but I'd like to get a first try without staying up to; /archives//html/Topband/2021-02/msg00045.html (9,202 bytes)
17. Topband: 8 Circle question (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Mon, 7 Feb 2022 16:38:09 -0500; I'm looking at putting out an 8 circle but three of the antennas on the circumference may need to be seasonally placed since they would be on my neighbor's property. If those three were removed would; /archives//html/Topband/2022-02/msg00049.html (7,549 bytes)
18. Re: Topband: 8 Circle question (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Mon, 7 Feb 2022 16:45:39 -0500; I was doing the YCCC version which uses 9 antennas to form a 3 element endfire in each direction. I'm obviously limited in space here... Thanks and sorry for the confusion jim ab3cv _________________; /archives//html/Topband/2022-02/msg00052.html (8,867 bytes)
19. Topband: My new 9 Circle works great! (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Sun, 4 Dec 2022 14:34:27 -0500; Thanks to Steve's, VE6WZ, excellent YouTube videos, I decided to tackle a better RX antenna. I've been using a 2 element array phased by an NCC-2 which is better than what I've had in the past (BOG,; /archives//html/Topband/2022-12/msg00011.html (7,961 bytes)
20. Re: Topband: My new 9 Circle works great! (score: 1): Author: Jim Miller <jim@jtmiller.com>; Date: Wed, 7 Dec 2022 10:45:53 -0500; I failed to mention that W1FV was the original designer whose work was published in NCJ. My apologies for that! 73 Jim ab3cv _________________ Searchable Archives: http://www.contesting.com/_topband; /archives//html/Topband/2022-12/msg00035.html (9,399 bytes)

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