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Total 22 documents matching your query.

1. Topband: Titanex (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Sat, 10 Nov 2007 19:55:58 +0000 (GMT)
Hi All I have a standard 89 foot Titanex which I use on 160m - can anyone help by running the following through a computer model to advise the theoretical improvement in efficiency if I increase the
/archives//html/Topband/2007-11/msg00049.html (6,910 bytes)

2. Topband: 4 Square (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Mon, 24 Dec 2007 11:09:45 +0000 (GMT)
Hi all and Happy Holidays - I have been listening to the 80m nets in the morning working the DX - time after time I can only just hear the DX but the stations working the DX give s9+ reports I am rec
/archives//html/Topband/2007-12/msg00169.html (7,031 bytes)

3. Topband: Radial Depths (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Sat, 26 Jan 2008 13:09:16 +0000 (GMT)
Hi all - can anyone tell me if there is a depth in ordinary soil that is too deep for radials. I have a field which is currently growing wheat - when we harvest this year I am thinking of digging dow
/archives//html/Topband/2008-01/msg00186.html (6,910 bytes)

4. Topband: Radials (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Thu, 7 Feb 2008 14:47:31 +0000 (GMT)
Hi all and thanks for all the help on how deep to bury radials. My question this time - I am going to put in a 4 square and following ON4UN's book 4th ed page 11-85 states that it is standard procede
/archives//html/Topband/2008-02/msg00040.html (7,079 bytes)

5. Topband: Help on 4 Squares (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Fri, 22 Feb 2008 20:18:53 +0000 (GMT)
Hi all - I have some questions regarding four squares - My career was in commerce and not electronics so please excuse what may seem silly questions. Tom W8JI advocates that the normal 90/180 phasing
/archives//html/Topband/2008-02/msg00115.html (7,541 bytes)

6. Topband: 4 Square (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Sat, 21 Jun 2008 11:16:46 +0000 (GMT)
I have been reading with interest all the posts regarding the ways in which to protect 4 sq against lightening. I would like to have comments to my simplistic approach to this problem as I am current
/archives//html/Topband/2008-06/msg00057.html (7,015 bytes)

7. Topband: Crossfire phasing (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Thu, 7 Aug 2008 17:09:58 +0000 (GMT)
Hi all - I am puttting in an 80m 4 square and would like some help on the following - Tom  W8JI states he uses 8 directions - and of course the phasing is to the leading vertical at 240 then the 2 ce
/archives//html/Topband/2008-08/msg00017.html (8,023 bytes)

8. Topband: Softrock SDR (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Wed, 31 Dec 2008 20:37:03 +0000 (GMT)
Happy New Year to all - I wonder if anyone can send me the link to an article mentioned earlier 2008 regarding using 4 Softrock SDR receivers in a directional antenna receiving system - many thanks f
/archives//html/Topband/2008-12/msg00304.html (6,337 bytes)

9. Topband: 4SQ Question (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Sat, 5 Dec 2009 12:22:07 +0000 (GMT)
Hi all - does anyone know of a site that will give me info on phasing two 4sq arrays and what gain I might expect over a single 4 sq - many thanks Dave G3RCQ _________________________________________
/archives//html/Topband/2009-12/msg00057.html (6,594 bytes)

10. Topband: W8JI Crossfire Phasing (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Sun, 14 Feb 2010 21:17:00 +0000 (GMT)
Hi all I am in need of some advice please - firstly has anyone built a 4 square using Tom's crossfire method - does it work and was it worth the effort over a conventional phasing method? My next que
/archives//html/Topband/2010-02/msg00133.html (7,667 bytes)

11. Topband: Reactance (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Fri, 19 Mar 2010 15:17:56 +0000 (GMT)
I have an 80m vertical 62ft 6in high tuned against 120 - 70 foot radials - I am trying to achieve a base impedance of 25 j0. The current configuration shows 26 j18 - I have put a capacitance of 38pf
/archives//html/Topband/2010-03/msg00110.html (6,866 bytes)

12. Topband: Reactance (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Thu, 25 Mar 2010 20:57:01 +0000 (GMT)
Hi all - I had some really good replies to my last Q so thanks again - My new Q - Using Eznec I have obtained the driven impedance for the 120 degree delay on my 4 sq.firing of the sides - not the di
/archives//html/Topband/2010-03/msg00142.html (7,467 bytes)

13. Topband: DXE 8 Verticals (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Mon, 20 Feb 2012 08:42:40 +0000 (GMT)
 I have used both the Hi-Z and the DXE 8 circle - maybe I am missing something but gain is one thing and signal to noise is another! Does changing the links in the DXE amp improve the signal to noise
/archives//html/Topband/2012-02/msg00294.html (6,614 bytes)

14. Topband: RDF (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Fri, 25 Jan 2013 21:27:04 +0000 (GMT)
How do I calculate RDF I am currently modelling the Shared Apex Loop antenna recently described in QEX and QST , Not to be confused with the following months article on phased K9AYs - I have an 8 dir
/archives//html/Topband/2013-01/msg00204.html (7,223 bytes)

15. Topband: Voltage along coax feeder (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Tue, 26 Mar 2013 20:48:50 +0000 (GMT)
Could anyone please point me in the direction of a circuit to feed +12 -12 and AC along the feeder to my beverages to switch 3 relays - thanks all from Dave in the UK All good topband ops know fine w
/archives//html/Topband/2013-03/msg00139.html (6,967 bytes)

16. Topband: 2 Direction reversable beverage using coax cable (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Sun, 14 Apr 2013 20:39:41 +0100 (BST)
I have finished the installation of 2 two directional beverage following the design in ON4UN 5th edition chapter 7-89 Fig 7-118  -  I cannot get the reflection transformer T3 to give the same gain as
/archives//html/Topband/2013-04/msg00039.html (7,713 bytes)

17. Topband: Eznec/ 4sq (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Tue, 17 Dec 2013 15:32:27 +0000 (GMT)
For many years I have run 4sq on both 80m and 40m - I currently run an 8 element vertical array for 80m and the centre mast is a top loaded vertical 85 foot vertical. When resonating my 4sq verticals
/archives//html/Topband/2013-12/msg00189.html (8,318 bytes)

18. Topband: Twinax (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Tue, 7 Apr 2015 14:12:16 +0000 (UTC)
I am in the process of building a Waller Flag -  I am going to use Twinax - the Twinax I have purchased has a braiding screen similar to coax. What do I connect if anything the coax type screening to
/archives//html/Topband/2015-04/msg00079.html (6,859 bytes)

19. Topband: Waller Loop (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Wed, 8 Apr 2015 18:03:48 +0000 (UTC)
Thanks to everyone that replied - much appreciated. JC - N4IS has confirmed that the braiding should be left floating. Dave g3rcq _________________ Topband Reflector Archives - http://www.contesting.
/archives//html/Topband/2015-04/msg00091.html (6,514 bytes)

20. Topband: Waller Loop (score: 1)
Author: David Cole <g3rcq@yahoo.co.uk>
Date: Thu, 3 Sep 2015 19:33:33 +0000 (UTC)
I have built a Waller Loop to the dimension from information on the internet, the loop is vertical and mounted on a tower at 30 foot. My problem is I cannot get any front to back. I have rewound the
/archives//html/Topband/2015-09/msg00005.html (7,709 bytes)

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