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References: [ +from:jeremy@maris.plus.com: 24 ]

Total 24 documents matching your query.

1. Topband: Skin effect on RG6U at top band (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Mon, 31 Jan 2011 10:19:15 +0000
We've used 1 km of coax to feed a remote Beverage (3 wavelength, 60 degrees, for VK and far east). 750m of the coax is RG6U, with copper braid. The results were poor, despite a 10dB head amplifier at
/archives//html/Topband/2011-01/msg00161.html (7,353 bytes)

2. Re: Topband: RG6 coax questions (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Thu, 12 May 2011 10:11:26 +0100
I'd support Guy Olinger's K2AV comments re coax quality. I bought a copper braid CCS "satellite cable" variant of RG6U from ebay that looked fine and would probably have worked fine for short runs fo
/archives//html/Topband/2011-05/msg00027.html (7,787 bytes)

3. Re: Topband: Propagation on CQWW CW 160M (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Fri, 3 Feb 2012 15:57:20 +0000
Propagation was very bad on the Friday/Saturday to the South coast of England - only managed 4 W/VE states compared to many more in previous years but Saturday/Sunday was much better - and yes we had
/archives//html/Topband/2012-02/msg00031.html (8,751 bytes)

4. Re: Topband: Last news for 3C6A (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Fri, 24 Feb 2012 23:14:16 +0000
Agreed. And speaking as someone in the UK with a nice South Beverage I'd be pleased to work them. As would many others in Europe and Asia, no doubt. There' a whole world outside of the USA! As to con
/archives//html/Topband/2012-02/msg00374.html (9,762 bytes)

5. Re: Topband: ARRL 160 contest (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Fri, 30 Nov 2012 19:14:23 +0000
Well as an EU station that consistently works ARRL 160 (though Stew and CQWW 160 are better) I do hope to work into the West Coast, so please someone listen but happy to work anyone. I don't hold out
/archives//html/Topband/2012-11/msg00507.html (8,433 bytes)

6. Re: Topband: Measured RG-6 Loss: Solid Copper vs. Copper Clad center conductor (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Thu, 24 Jan 2013 17:06:21 +0000
I posted earlier on the list (31 January 2011 ) problems we had with some cheap ebay "satellite cable" CCS RG6 that I was using on a long run to 160m Beverages. The 250m reels came from different sup
/archives//html/Topband/2013-01/msg00178.html (11,743 bytes)

7. Re: Topband: 160M Contest (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Sat, 7 Dec 2013 18:13:51 +0000
Conditions not brilliant from the UK for me, but worked OK into AZ and NM. Didn't hear anything from North West or coast, CA, NV UT etc. Polar paths not good, I guess. Still need HI and ND for my (QR
/archives//html/Topband/2013-12/msg00059.html (8,615 bytes)

8. Topband: Dull and Boring (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Sat, 9 Aug 2014 18:52:45 +0100
The BBC had a news article today about Dull twinning with Boring - hope Tree is amused! Will see about planning a DXpedition to Dull so that I can work K7RAT :) http://www.bbc.co.uk/news/uk-scotland-
/archives//html/Topband/2014-08/msg00069.html (6,498 bytes)

9. Re: Topband: Beverage Question (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Sun, 21 Sep 2014 10:09:26 +0100
I've just finished putting up a ~300m NE/SW reversible beverage at G4AQG using two pairs of paralleled WD1/TT wire for the feeder, spaced 50mm apart. I used nine 2.7m 3x3 posts with electric fence in
/archives//html/Topband/2014-09/msg00113.html (10,665 bytes)

10. Re: Topband: Beverage Question (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Sun, 21 Sep 2014 20:34:20 +0100
The way I looked at it was that the equivalent diameter would be a bit less than twice the diameter of the wires plus the spacing. According to the Mil Spec for WD-1A/TT is 0.84mm diameter per conduc
/archives//html/Topband/2014-09/msg00115.html (12,206 bytes)

11. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Thu, 26 Feb 2015 10:55:47 +0000
For those who'd like to read the whole paper, you can access it here http://bit.ly/1LLdtCI Jeremy _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2015-02/msg00650.html (8,351 bytes)

12. Re: Topband: WD-1A wire (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Sun, 7 Jun 2015 21:09:00 +0100
Yes WD1A works very well with the conductors strapped. I've built a 300m long reversible beverage up at about 2.4m with two parallel runs of strapped WD1A about 50mm apart. Impedance of this line is
/archives//html/Topband/2015-06/msg00039.html (8,756 bytes)

13. Re: Topband: BCB High Pass Filter (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Fri, 4 Mar 2016 00:55:34 +0000
I noticed a bit of BC inter-mod so built a 9 pole Chebyshev high pass filter dead bug style in a small diecast box with some internal screening made from double sided pcb stock. I designed it with th
/archives//html/Topband/2016-03/msg00049.html (9,323 bytes)

14. Re: Topband: small garden 160m (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Mon, 21 Aug 2017 12:28:07 +0100
W0UCE (SK) pages on the FCP can be found via the wayback machine https://web.archive.org/web/20160306094957/http://www.w0uce.net/k2avantennas.html Jeremy Maris G3XDK _________________ Topband Reflect
/archives//html/Topband/2017-08/msg00016.html (8,496 bytes)

15. Re: Topband: DHDL matching Transformer (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Tue, 28 Nov 2017 18:24:11 +0000
Hi Trevor, Luis IV3PRK has good info on DHDL, based on the original by George Wallner, AA7JV See http://www.iv3prk.it/TX3A-DHDL.htm I use a 1200 ohm terminating resistor; source resistance is about 9
/archives//html/Topband/2017-11/msg00161.html (7,730 bytes)

16. Re: Topband: Supporting Ladder line (score: 1)
Author: jeremy maris <jeremy@maris.plus.com>
Date: Sun, 7 Jan 2018 10:28:00 +0000
Hi Vic, Ive done something similar to Jim with two paralleled runs of WD1A for a bi-directional Beverage and it worked very well. According to the specifications, WD1A is made up of two 0.85mm diamet
/archives//html/Topband/2018-01/msg00020.html (12,611 bytes)

17. Re: Topband: Coax for Top-band beverage antenna (score: 1)
Author: Jeremy Maris <jeremy@maris.plus.com>
Date: Thu, 19 Sep 2019 18:40:33 +0100
That depends upon the length of the feedline: cheap copper plated satellite RG6 has a *lot* of attenuation at 2MHz, as much as 3.6dB per 100m We have a 750m coax feed to our beverages and attenuation
/archives//html/Topband/2019-09/msg00092.html (9,222 bytes)

18. Re: Topband: Source for durable ladder line? (score: 1)
Author: Jeremy Maris <jeremy@maris.plus.com>
Date: Sun, 12 Jan 2020 23:43:22 +0000
Jeremy G3XDK / G4AQG Jeremy Maris 140 Edward Street, Brighton BN2 0JL jeremy@maris.plus.com _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
/archives//html/Topband/2020-01/msg00201.html (10,507 bytes)

19. Re: Topband: Source for durable ladder line? (score: 1)
Author: Jeremy Maris <jeremy@maris.plus.com>
Date: Mon, 13 Jan 2020 11:16:25 +0000
Theres a good thread on this here: https://topband.contesting.narkive.com/GKD4HWdS/topband-wd-1a-2-way-beverage We have some remote beverages fed via about 700m/2400ft of low loss coax - around 6dB
/archives//html/Topband/2020-01/msg00206.html (10,075 bytes)

20. Re: Topband: BCB Filter Recommendation? (score: 1)
Author: Jeremy Maris <jeremy@maris.plus.com>
Date: Thu, 16 Apr 2020 22:45:22 +0100
Make your own! Use this site to design your filter. http://www.iowahills.com/9RFFiltersPage.html Attached are the values I used back in 2016 when the G4AQG FT-1000MP had intermod problems with a new
/archives//html/Topband/2020-04/msg00067.html (9,044 bytes)

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