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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Fw\:\s+GAP\s+VERTICAL\s+QUESTION\s*$/: 29 ]

Total 29 documents matching your query.

1. Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: HAROLD SMITH JR <w0rihps@sbcglobal.net>
Date: Tue, 11 Dec 2012 18:37:43 -0800 (PST)
The GAP Voyager is not much better than a dummy load on 160m.  On 80m and 40m it received fairly well compared to my other 80 and 40 antennas. Doug Original Message-- With the prospect of downsizing
/archives//html/Topband/2012-12/msg00317.html (7,974 bytes)

2. Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: k6xt <k6xt@arrl.net>
Date: Wed, 12 Dec 2012 11:30:36 -0700
My first antenna, still in use, on moving to CO is a GAP Titan, advertised to load up 80 thru 10 including WARC bands. The Titan is a bit shorter than Voyager, 28 feet or something like it. The adver
/archives//html/Topband/2012-12/msg00324.html (9,445 bytes)

3. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Ashton Lee <Ashton.R.Lee@hotmail.com>
Date: Wed, 12 Dec 2012 12:07:59 -0700
This wonderful article written by L.B.Cebic W4RNL sure can make you a believer in a simple wire inverted L. It is the last antenna discussed. http://www.users.on.net/~bcr/files/backyard%20wire%20ante
/archives//html/Topband/2012-12/msg00325.html (11,624 bytes)

4. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Guy Olinger K2AV <olinger@bellsouth.net>
Date: Wed, 12 Dec 2012 14:54:03 -0500
With the following caveat: The very sparse and short buried radial systems he is showing are FAR more lossy in practice than shown in his gain tables. Four twenty foot buried radials beneath a 1/4 wa
/archives//html/Topband/2012-12/msg00326.html (12,844 bytes)

5. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Ashton Lee <Ashton.R.Lee@hotmail.com>
Date: Wed, 12 Dec 2012 13:11:58 -0700
The question is not "How would you set up a contest station?" it is "What is practical to keep on air in a Senior Living situation?" Now if you have a bunch of grand kids you can talk into installing
/archives//html/Topband/2012-12/msg00327.html (14,558 bytes)

6. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: DAVID CUTHBERT <telegrapher9@gmail.com>
Date: Wed, 12 Dec 2012 13:13:54 -0700
20 dB implies that the ground system loss is 10X the inverted-L radiation resistance. This would result in an input resistance of 250 ohms and a minimum VSWR if 5:1. I don't think that is what the re
/archives//html/Topband/2012-12/msg00328.html (15,133 bytes)

7. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: DAVID CUTHBERT <telegrapher9@gmail.com>
Date: Wed, 12 Dec 2012 13:17:18 -0700
Correction, 100X the loss. The deal difference between a single ground rod and a BC station ground will be about 6 dB. _______________________________________________ Topband reflector - topband@cont
/archives//html/Topband/2012-12/msg00329.html (16,179 bytes)

8. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Gary and Kathleen Pearse <pearse@gci.net>
Date: Wed, 12 Dec 2012 11:44:28 -0900
FWIW, at one point on a 5 acre remote parcel I had a GAP Voyager, GAP Titan, 80/160 parallel Inv-L over 120/125' radials, a 160M Inv-V, a F-12 C-4SXL beam at 54', and homemade vertical fan dipoles fo
/archives//html/Topband/2012-12/msg00330.html (8,832 bytes)

9. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Wed, 12 Dec 2012 16:25:24 -0500
With the following caveat: The very sparse and short buried radial systems he is showing are FAR more lossy in practice than shown in his gain tables. Four twenty foot buried radials beneath a 1/4 wa
/archives//html/Topband/2012-12/msg00331.html (11,877 bytes)

10. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Guy Olinger K2AV <olinger@bellsouth.net>
Date: Wed, 12 Dec 2012 17:13:35 -0500
Not all loss is visible as series resistance in the counterpoise system, which is the tack you are taking. Note that a dummy load is 50 ohms, and does not radiate worth a hoot. It takes modeling to i
/archives//html/Topband/2012-12/msg00332.html (16,932 bytes)

11. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: DAVID CUTHBERT <telegrapher9@gmail.com>
Date: Wed, 12 Dec 2012 16:13:40 -0700
Guy, you make it sound like magic. See the IEEE paper RADIATION EFFICIENCY AND INPUT IMPEDANCE OF MONOPOLE ELEMENTS WITH RADIAL-WIRE GROUND PLANES IN PROXIMITY TO EARTH ______________________________
/archives//html/Topband/2012-12/msg00333.html (19,156 bytes)

12. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>
Date: Wed, 12 Dec 2012 16:10:19 -0500
Well, Tom I operate from a small city lot, although I do have some tall trees! I've done OK on 160 and 80 with a 160 inverted L and full size 80m GP - both with elevated resonant radials. (The 160 ra
/archives//html/Topband/2012-12/msg00334.html (12,966 bytes)

13. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: "Scott MacKenzie" <kb0fhp@verizon.net>
Date: Wed, 12 Dec 2012 18:28:08 -0500
Personally, I use an 80 M loop - I like it especially for stateside contest like Sweep or FD. Nice solid signal on 40M and 80M. It does much better than the Titan. But the Titan is much less maintena
/archives//html/Topband/2012-12/msg00335.html (11,392 bytes)

14. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Guy Olinger K2AV <olinger@bellsouth.net>
Date: Wed, 12 Dec 2012 18:34:20 -0500
[I may have sent an incomplete version of something on this topic. Apologies] 6 dB would be someone's calculation based on currents. The sometimes abysmal performance of a ground rod based vertical s
/archives//html/Topband/2012-12/msg00336.html (21,526 bytes)

15. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Eddy Swynar <deswynar@xplornet.ca>
Date: Wed, 12 Dec 2012 18:39:03 -0500
By far, the absolute BEST DX antenna that I've ever had the pleasure of using for the low bands is the inverted Bobtail array (40-meters): no radial fields required, super-easy to feed, all-wire cons
/archives//html/Topband/2012-12/msg00337.html (9,289 bytes)

16. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: DAVID CUTHBERT <telegrapher9@gmail.com>
Date: Wed, 12 Dec 2012 17:10:33 -0700
Guy, here is where I believe your mysterious extra "loss" in NEC is coming from. You are reading the "average gain" loss. NEC calculates that by integrating the power at infinity and dividing by the
/archives//html/Topband/2012-12/msg00339.html (24,020 bytes)

17. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: Guy Olinger K2AV <olinger@bellsouth.net>
Date: Wed, 12 Dec 2012 21:13:33 -0500
Interspersed. Yes, indeed. But where do those ground losses ACTUALLY start? Why is it that what you call "far far" ground losses can vary by raising very low feed points small amounts above ground th
/archives//html/Topband/2012-12/msg00342.html (17,306 bytes)

18. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: "Richard Fry" <rfry@adams.net>
Date: Thu, 13 Dec 2012 06:06:40 -0600
This is ~true only for a "far field" analysis (as defined by NEC software) for a vertical monopole -- which includes the propagation losses present in the radiated fields from that monopole, over an
/archives//html/Topband/2012-12/msg00344.html (8,334 bytes)

19. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: "Charlie Cunningham" <charlie-cunningham@nc.rr.com>
Date: Wed, 12 Dec 2012 17:21:37 -0500
That's the paper I was referring to earlier. Really useful for 160m folks! Charlie, K4OTV --Original Message-- From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of DAVID CUTHBERT Sent:
/archives//html/Topband/2012-12/msg00346.html (21,139 bytes)

20. Re: Topband: Fw: GAP VERTICAL QUESTION (score: 1)
Author: "Tom W8JI" <w8ji@w8ji.com>
Date: Thu, 13 Dec 2012 11:49:10 -0500
This is ~true only for a "far field" analysis (as defined by NEC software) for a vertical monopole -- which includes the propagation losses present in the radiated fields from that monopole, over an
/archives//html/Topband/2012-12/msg00348.html (10,591 bytes)

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