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Total 66 documents matching your query.

41. Re: Topband: Inverted L (score: 1)
Author: "Milt, N5IA" <n5ia@zia-connection.com>
Date: Fri, 12 Feb 2010 23:17:33 -0700
I had forgotten about the insulating of the parasitics on the F12 stuff. He would just have to remove the slit plastic tubing (slit pvc water pipe) and tighten the element mount U bolts directly on t
/archives//html/Topband/2010-02/msg00123.html (9,597 bytes)

42. Re: Topband: Inverted L (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 14 Feb 2010 13:19:47 -0500
An even larger problem is that changing the elements of an F12 antenna from insulated mounting to grounded with the relatively large boom to element plate will detune the antenna. The element mounti
/archives//html/Topband/2010-02/msg00130.html (11,953 bytes)

43. Re: Topband: Inverted L (score: 1)
Author: RT Clay <rt_clay@bellsouth.net>
Date: Mon, 15 Feb 2010 07:36:37 -0800 (PST)
I recently went through this- on top of my 100 foot tower that I shunt feed for 160 is a Force 12 EF 420/240 (4 element 20 + 2 shortened 40m elements). On 160 I was not getting any flashover of the
/archives//html/Topband/2010-02/msg00138.html (9,212 bytes)

44. Topband: Inverted L (score: 1)
Author: "Michael Kincaid" <w7fkf@fast.net>
Date: Mon, 29 Nov 2010 16:11:30 -0600
Have built an inverted L based on info derived from this list. The 128' 14ga solid copper plastic coated wire is installed on a 45' oak tree. Had to use elevated radials at 8' high. Only able to inst
/archives//html/Topband/2010-11/msg00123.html (6,912 bytes)

45. Re: Topband: Inverted L (score: 1)
Author: Guy Olinger K2AV <olinger@bellsouth.net>
Date: Tue, 30 Nov 2010 03:05:08 -0500
Elevated radials are also part of the resonance equation. You did not mention how long the radials are and whether they are all the same length and evenly distributed. If they are short, then your re
/archives//html/Topband/2010-11/msg00126.html (9,795 bytes)

46. Topband: Inverted L (score: 1)
Author: "Carol Richards" <n2mm@comcast.net>
Date: Tue, 29 Nov 2011 21:56:23 -0500
I have a few questions which I am hopeful that the gurus can help me with. 1. Using an rf-choke at the feed point...How many turns and what diameter? 2. Where can I get 200-500feet of 75 ohm tv cable
/archives//html/Topband/2011-11/msg00284.html (7,095 bytes)

47. Re: Topband: Inverted L (score: 1)
Author: Rik van Riel <riel@surriel.com>
Date: Tue, 29 Nov 2011 22:27:16 -0500
No. 160m is a very wide band, 200kHz at 2MHz is about 10%. This results in your wire antenna being quite reactive on a large part of the band. On one part of the band, the antenna will be inductive,
/archives//html/Topband/2011-11/msg00285.html (9,560 bytes)

48. Re: Topband: Inverted L (score: 1)
Author: Phil Duff <na4m@arrl.net>
Date: Wed, 30 Nov 2011 03:40:16 +0000
Check eBay. I recently got a 1000ft spool of CommScope 75 ohm flooded (for underground burial) double shielded RG6 for $35. + shipping. 73 Phil NA4M -- -. .- ....- -- -. .- ....- -- -. .- ....- -- Ph
/archives//html/Topband/2011-11/msg00286.html (7,419 bytes)

49. Re: Topband: Inverted L (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Wed, 30 Nov 2011 04:51:29 +0100
Be careful with cheap tv cable. Some are just steel wire with a very thin copper layer which does not matter at UHF with the skin effect there. But on 160m you might run into too high losses. 73 Pete
/archives//html/Topband/2011-11/msg00287.html (6,865 bytes)

50. Re: Topband: Inverted L (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Tue, 29 Nov 2011 22:48:22 -0600
Very true. But the 1000' rolls of Commscope RG-6 I bought cheaply off of eBay had a sufficiently thick coating of copper. CATV-type Commscope brand quad aluminum shield RG-6 is all I use here to feed
/archives//html/Topband/2011-11/msg00288.html (7,937 bytes)

51. Re: Topband: Inverted L (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 30 Nov 2011 00:12:45 -0500
While that may be true for loss at the lower HF range, it is not the case in the upper HF/Low VHF and UHF range. RG-6 will show from 1 to 5 dB more loss depending on frequency. In addition, RG-6 wil
/archives//html/Topband/2011-11/msg00289.html (8,986 bytes)

52. Re: Topband: Inverted L (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Wed, 30 Nov 2011 00:13:51 -0600
You're right. But after all, this is the Topband list, and not an upper HF/VHF/UHF list, right? :-) For 160 meters, RG-213/U has zero advantage over RG-6 either for loss or power handling. 73, Mike w
/archives//html/Topband/2011-11/msg00290.html (7,899 bytes)

53. Re: Topband: Inverted L (score: 1)
Author: "ZR" <zr@jeremy.mv.com>
Date: Wed, 30 Nov 2011 09:22:29 -0500
Since this is the Topband reflector and a 160M inverted L is the subject then RG-6 is fine. Ive been using about 100' of it for about 13 years to feed an 80M sloper and there hasnt been any problem a
/archives//html/Topband/2011-11/msg00294.html (11,362 bytes)

54. Re: Topband: Inverted L (score: 1)
Author: "N2TK, Tony" <tony.kaz@verizon.net>
Date: Wed, 30 Nov 2011 09:48:28 -0500
After 15 years of using Commscope flooded RG6 for my 80M wire 4-sq I am showing corrosion on the center conductor at the feedpoints and Comtek box. So got another roll of the same stuff from eBay and
/archives//html/Topband/2011-11/msg00295.html (9,496 bytes)

55. Re: Topband: Inverted L (score: 1)
Author: Phil Duff <na4m@arrl.net>
Date: Wed, 30 Nov 2011 15:23:53 +0000
One thing I learned from my recent antenna project using RG6 and F connectors was to buy quality environmentally sealed F connectors (Snap-N-Seal) and the proper RG6 cutting/stripping and Snap-N-Seal
/archives//html/Topband/2011-11/msg00296.html (8,716 bytes)

56. Re: Topband: Inverted L (score: 1)
Author: Eddy Swynar <deswynar@xplornet.ca>
Date: Wed, 30 Nov 2011 10:51:41 -0500
Hi Phil, All I do here to make my terminations / connections is employ standard PL-259 plugs, with RG-59 reducers... The RG-6 fits very nicely into those. Because I use aluminum foil shielding in min
/archives//html/Topband/2011-11/msg00297.html (9,088 bytes)

57. Re: Topband: Inverted L (score: 1)
Author: Michael Goins <wmgoins@gmail.com>
Date: Wed, 30 Nov 2011 09:56:54 -0600
I am looking ofr coax for a quad (10/12/15/17/20 as well as a half square or inverted L. Will I have issues with loss on the upper bands with this coax? Mike, k5wmg __________________________________
/archives//html/Topband/2011-11/msg00298.html (10,075 bytes)

58. Topband: Inverted L (score: 1)
Author: "Don" <w4dee@truvista.net>
Date: Fri, 30 Jan 2015 12:55:58 -0500
What interaction between a Inverted L and 80 & 40 meter dipoles off the same tower ? Don W4DEE _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2015-01/msg00323.html (6,146 bytes)

59. Re: Topband: Inverted L (score: 1)
Author: KD0Q-Glenn <kd0q@traer.net>
Date: Fri, 30 Jan 2015 18:13:15 -0600
There will be some interaction. How much? All depends. You can get some idea by modeling with EZNEC. The tower can have some effect too. Glenn KD0Q Don W4DEE _________________ Topband Reflector Archi
/archives//html/Topband/2015-01/msg00337.html (7,202 bytes)

60. Re: Topband: Inverted L (score: 1)
Author: "chetmoore" <chetmoore@cox.net>
Date: Fri, 30 Jan 2015 20:55:04 -0500
NO interaction noted at my qth on 80 or 40m. 90 foot tower, 2 element cushcraft xm 240 at 75 feet, ten foot yardarm through the tower (ab-105) at 70 feet. 80m inverted vee hung off one side, inverted
/archives//html/Topband/2015-01/msg00339.html (8,246 bytes)

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