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1. [TowerTalk] real world formula for the length of a quarter wave transmission line (score: 1): Author: n2mm@comcast.net; Date: Wed, 13 Feb 2013 19:39:19 +0000 (UTC); Help, I lost my antenna handbook. Does anyone know the formula that is fairly accurate for a 75ohm quarter wave tranformer for my 80m quad. is it 234xVF or 246 x VF; /archives//html/Towertalk/2013-02/msg00224.html (7,428 bytes)
2. Re: [TowerTalk] real world formula for the length of a quarter wave transmission line (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 13 Feb 2013 21:07:22 -0800; Help, I lost my antenna handbook. Does anyone know the formula that is fairly accurate for a 75ohm quarter wave tranformer for my 80m quad. is it 234xVF or 246 x VF 3e8 m/sec free space speed of ligh; /archives//html/Towertalk/2013-02/msg00230.html (8,449 bytes)
3. Re: [TowerTalk] real world formula for the length of a quarter wave transmission line (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 13 Feb 2013 21:16:43 -0800; And don't forget that Vf varies a bit with frequency (it's slightly lower at lower frquencies). The difference is small, but enough that you want to carefully tune the stub at the frequency that you; /archives//html/Towertalk/2013-02/msg00231.html (8,491 bytes)
4. Re: [TowerTalk] real world formula for the length of a quarter wave transmission line (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Thu, 14 Feb 2013 05:33:33 -0800; On 2/13/13 9:16 PM, Jim Brown wrote: And don't forget that Vf varies a bit with frequency (it's slightly lower at lower frquencies). The difference is small, but enough that you want to carefully tun; /archives//html/Towertalk/2013-02/msg00232.html (9,014 bytes)
5. Re: [TowerTalk] real world formula for the length of a quarter wave transmission line (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 14 Feb 2013 06:39:05 -0800; On 2/14/2013 5:33 AM, Jim Lux wrote: I think the OP was looking for a impedance transformer, and for that application, I think small errors in length won't have a big effect. Say you were using 1/4 w; /archives//html/Towertalk/2013-02/msg00233.html (9,419 bytes)

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