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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Inverted\s+L\s+Radials\s*$/: 6 ]

Total 6 documents matching your query.

1. Topband: Inverted L Radials (score: 1)
Author: james soto via Topband <topband@contesting.com>
Date: Thu, 1 Dec 2016 19:59:57 +0000 (UTC)
Hi allLast year i install an inverted L antenna for 160 with few radials different lenght.ohms was between 20 to 25 ohms and swr about 2.2 . This past weekend i was checking thethe antenna with the m
/archives//html/Topband/2016-12/msg00007.html (7,523 bytes)

2. Re: Topband: Inverted L Radials (score: 1)
Author: "K1FZ-Bruce" <k1fz@myfairpoint.net>
Date: Thu, 01 Dec 2016 15:14:25 -0500
This is normal, but without the radials your RF is  mostly heating up the earth.   If you make the L a little longer, then insert a variable capacitor at the feed point, you should be able to find a
/archives//html/Topband/2016-12/msg00008.html (8,163 bytes)

3. Re: Topband: Inverted L Radials (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Thu, 1 Dec 2016 16:20:18 -0500
Yup, and some very large percentage of your power is now being dissipated in the ground. Could be as bad as 80 or 90 percent, depending on how low the actual radiation resistance of the L is. . Worst
/archives//html/Topband/2016-12/msg00009.html (8,031 bytes)

4. Re: Topband: Inverted L Radials (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Thu, 1 Dec 2016 16:53:53 -0800
As you were disconnecting the radials the ground losses were increasing until it got to enough ohms and you had a good match at 50ohms. My 160 T matches 25 ohms 1.12:1 at 1812Khz and is fed with a 50
/archives//html/Topband/2016-12/msg00010.html (9,732 bytes)

5. Re: Topband: Inverted L Radials (score: 1)
Author: Drew Vonada-Smith <drew@whisperingwoods.org>
Date: Fri, 2 Dec 2016 12:11:14 -0600
I agree with the comments so far, and also that a 2:1 transmission line transformer is a good method.  But if you are in a hurry, here is an very easy approach.   Just use a hairpin match.  Mine was
/archives//html/Topband/2016-12/msg00015.html (11,148 bytes)

6. Re: Topband: Inverted L Radials (score: 1)
Author: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Sat, 3 Dec 2016 08:27:21 -0500
My planned inverted L has morphed a bit ... I modeled it it is planned as a 95 100 vertical section (depends on the amount of droop I can remove from a ~400 line from the top guy ring at 122 to a tre
/archives//html/Topband/2016-12/msg00016.html (9,532 bytes)

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