- 1. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: Kevin Normoyle <knormoyle@surfnetusa.com>
- Date: Sun, 18 Jul 2010 09:43:46 -0700
- 40M 2L 50 ohm impedance? with reasonable gain/f/b/swr bandwidth? I don't think so, or I couldn't do it (with my boom length and full length elements) Am I missing something? Actually I did create one
- /archives//html/Towertalk/2010-07/msg00334.html (9,283 bytes)
- 2. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
- Date: Sun, 18 Jul 2010 11:50:37 -0500
- Hi Kevin, The W6NL Moxon is pretty simple (no matching components) and it is a 50 ohm feed. Check out: http://www.k3lr.com/engineering/moxon/W6NL_Moxon104.pdf The VSWR never gets over 1.4:1 from 7 to
- /archives//html/Towertalk/2010-07/msg00335.html (10,498 bytes)
- 3. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: "Tom Osborne" <w7why@verizon.net>
- Date: Sun, 18 Jul 2010 09:55:19 -0700
- I'm not sure what the difference in a 20 or a 40 meter antenna would be, but I built a 2-element 20 meter antenna here that I feed directly with 50 ohm coax. It is on a 1/4 wave boom with a split dri
- /archives//html/Towertalk/2010-07/msg00336.html (8,948 bytes)
- 4. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: jimlux <jimlux@earthlink.net>
- Date: Sun, 18 Jul 2010 10:53:56 -0700
- There's really nothing special about "matching components" vs "antenna feed method" to get a particular feed point impedance. most of the feed schemes are, in effect, a lumped or distributed matching
- /archives//html/Towertalk/2010-07/msg00337.html (11,565 bytes)
- 5. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: "donhall161" <donhall161@sbcglobal.net>
- Date: Sun, 18 Jul 2010 13:49:15 -0500
- Kevin, The ARRL Antenna Book has a 2el 40M Yagi with direct feed. Check out any late edition(mine is the 17th). 73 Don K5AQ _______________________________________________ ___________________________
- /archives//html/Towertalk/2010-07/msg00339.html (8,299 bytes)
- 6. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: Kevin Normoyle <knormoyle@surfnetusa.com>
- Date: Sun, 18 Jul 2010 12:23:47 -0700
- Don K5AQ to me mentioned the 50 ohm yagis in the ARRL antenna book. . I have 20th ed so. let's see. oh yeah Don's right..I guess I misremembered stuff.. But let's look at the performance: using the A
- /archives//html/Towertalk/2010-07/msg00341.html (9,212 bytes)
- 7. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: jimlux <jimlux@earthlink.net>
- Date: Sun, 18 Jul 2010 14:10:56 -0700
- Or, make a slightly more complex matching network. 7.0-7.3 MHz is 5% bandwidth, which is fairly broadband for a High Q (low loss) matching network. But nothing says you have to be limited to a single
- /archives//html/Towertalk/2010-07/msg00349.html (10,333 bytes)
- 8. Re: [TowerTalk] 50 ohm yagis (40M2L) ? (score: 1)
- Author: Kevin Normoyle <knormoyle@surfnetusa.com>
- Date: Sun, 18 Jul 2010 16:17:13 -0700
- Don pointed out a mistake in what I said... Correcting something I said about the ARRL antenna book 40M2L. I said something wrong about it's swr bandwidth, but it confirms what I'm saying anyhow. I m
- /archives//html/Towertalk/2010-07/msg00357.html (11,085 bytes)
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