- 1. Topband: 160m Inverted L High SWR (score: 1)
- Author: Bill Stewart <cwopr@embarqmail.com>
- Date: Tue, 1 Oct 2013 17:08:56 -0400 (EDT)
- Good afternoon all, I just finished installing a new Inverted L. The previous one was removed because a tree fell across a set of guys on my tower, which had to be taken down. The new Inverted L is s
- /archives//html/Topband/2013-10/msg00008.html (7,336 bytes)
- 2. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Richard Karlquist <richard@karlquist.com>
- Date: Tue, 01 Oct 2013 15:14:12 -0700
- The vert. section is abt 55 ft & the rest is nearly flat horizontal. Total length is 130 ft/6 in. I am using a 4 wire c-poise abt 9 ft high of which none are directly under the horiz. section. Each
- /archives//html/Topband/2013-10/msg00010.html (8,394 bytes)
- 3. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Grant Saviers <grants2@pacbell.net>
- Date: Tue, 01 Oct 2013 15:21:10 -0700
- In order of approximate decreasing importance: 1. the elevated radials should not be grounded anywhere. 2. With elevated radials, you must have a good feedline choke at the feedpoint, about 9 turns o
- /archives//html/Topband/2013-10/msg00011.html (9,290 bytes)
- 4. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Bill Stewart <cwopr@embarqmail.com>
- Date: Wed, 2 Oct 2013 13:04:49 -0400 (EDT)
- Tnx Richard for the info. I've got a small collection of doorknobs and will ck to see if I can cobble up that much capacitance. I only run less than 200 watts output, so won't need any HV vacuum caps
- /archives//html/Topband/2013-10/msg00013.html (9,493 bytes)
- 5. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Jim Bennett <w6jhb@mac.com>
- Date: Wed, 02 Oct 2013 10:16:21 -0700
- Bill, FWIW, I'm using 30 turns of 9913 coax close wound on a length of 8" ID PVC tube. Works very well for me. Jim / W6JHB _________________ Topband Reflector
- /archives//html/Topband/2013-10/msg00014.html (10,323 bytes)
- 6. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: "Tom W8JI" <w8ji@w8ji.com>
- Date: Wed, 2 Oct 2013 13:50:44 -0400
- I thought the "Q" of the antenna was not vry good since the SWR curve is vry broad. Q means many things. Some things might be good, some things might be bad, and some things are just meaningless. SWR
- /archives//html/Topband/2013-10/msg00015.html (8,101 bytes)
- 7. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Mike Waters <mikewate@gmail.com>
- Date: Wed, 2 Oct 2013 12:57:45 -0500
- Bill, If you lengthen the L portion, you will raise the feedpoint Z significantly. As I mentioned here last month, my inverted-L is about 155' long (vertical portion also about 55'). The simple 2-cap
- /archives//html/Topband/2013-10/msg00016.html (8,303 bytes)
- 8. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: "Gary Smith" <Gary@ka1j.com>
- Date: Wed, 02 Oct 2013 16:30:40 -0400
- Bill, I'm probably the least savant of those on the reflector. Really... But I have an inverted-L which is held up under the tallest tree I can find and I have 45-50 130' radials on the ground and I'
- /archives//html/Topband/2013-10/msg00017.html (9,655 bytes)
- 9. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Mike Waters <mikewate@gmail.com>
- Date: Wed, 2 Oct 2013 22:28:15 -0500
- It was not in the NCJ, Carl. (At least not that I'm aware of). It was in the ARRL Contest Update newsletter at http://www.arrl.org/contest-update-issues?issue=2013-09-25 73, Mike www.w0btu.com ______
- /archives//html/Topband/2013-10/msg00018.html (8,321 bytes)
- 10. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Bill Stewart <cwopr@embarqmail.com>
- Date: Thu, 3 Oct 2013 15:47:53 -0400 (EDT)
- To all who responded...many thanks. I am now in the process of reading over all the suggestions, which were plentiful. So far I have tried folding back (shortening) the C-P wires by 2 ft....no chan
- /archives//html/Topband/2013-10/msg00024.html (8,952 bytes)
- 11. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Mike Waters <mikewate@gmail.com>
- Date: Thu, 3 Oct 2013 15:52:40 -0500
- This is the feedpoint choke I use on mine. Based on an effective K9YC design (thank you, Jim!). http://www.w0btu.com/files/antenna/160m_inv-L/ The 4 stacked cores are 2.4" OD #31 Fair-rite (7 bucks e
- /archives//html/Topband/2013-10/msg00025.html (8,950 bytes)
- 12. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>
- Date: Sat, 2 Nov 2013 17:29:54 -0400
- Hi, Bill In your first post, you indicated that min VSWR was 2.9:1 at 1833 KHz, indicating that the system was resonant exactly where you wanted I to be. Could I respectfully suggest that at 1.8 MHz,
- /archives//html/Topband/2013-10/msg00026.html (11,046 bytes)
- 13. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: Richard Karlquist <richard@karlquist.com>
- Date: Thu, 03 Oct 2013 15:35:19 -0700
- dealt with by using a tuner between the transceiver and the feed-line, rather than doing all that work at the antenna. Not much All what work at the antenna? Just add a 2400 pF shunt capacitor and a
- /archives//html/Topband/2013-10/msg00027.html (8,873 bytes)
- 14. Re: Topband: 160m Inverted L High SWR (score: 1)
- Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>
- Date: Sat, 2 Nov 2013 17:42:31 -0400
- 10-fo' !! :-) All what work at the antenna? Just add a 2400 pF shunt capacitor and adjust the length of the antenna for resonance? Works perfectly on my vertical. Rick N6RK _________________ Topband
- /archives//html/Topband/2013-10/msg00028.html (9,140 bytes)
- 15. Topband: 160m Inverted L High SWR (score: 1)
- Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
- Date: Fri, 4 Oct 2013 21:28:28 +0100
- Works OK for me as well! Although mine needs 1600pF and I use little ceramic capacitors rated at 6.3KV, which are readily available from CPC/Farnell at about 10p each. 73 Tom G3OLB <<All what work at
- /archives//html/Topband/2013-10/msg00036.html (8,017 bytes)
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