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References: [ +from:n1rj@roadrunner.com: 107 ]

Total 107 documents matching your query.

1. Topband: solder (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 31 May 2007 19:57:15 -0400
I've heard that regular 60/40 tin-lead solder corrodes rather quickly when exposed to the elements. What type of solder is best for use in soldering copper wire outdoors such as in radial systems? 73
/archives//html/Topband/2007-05/msg00095.html (6,288 bytes)

2. Topband: Q of inductors (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 31 Aug 2007 09:34:06 -0400
A while back I purchased a Collins 180L-2 coupler with the idea of using the rotary inductor and vacuum variable in an antenna coupler project. I took out my trusty GR 1606 bridge to measure the indu
/archives//html/Topband/2007-08/msg00143.html (7,158 bytes)

3. Re: Topband: [TowerTalk] RX 4 square (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sat, 01 Sep 2007 11:10:22 -0400
I'm not an engineer and am having a hard time understanding this. It's my understanding that, if a cable is terminated in it's characteristic impedance, the phase shift will be equal to the electrica
/archives//html/Topband/2007-09/msg00001.html (8,103 bytes)

4. Topband: DSL (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 25 Oct 2007 10:07:18 -0400
I originally had DSL service here (before cable). I'm lucky that the phone line from the pole is buried for about 200 ft before it enters the house. The original scheme was to install the DSL modem a
/archives//html/Topband/2007-10/msg00163.html (7,473 bytes)

5. Topband: JA1HQT (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Tue, 04 Dec 2007 08:09:04 -0500
I worked Saka this AM but can't seem to find his 6 digit grid square. Back issue of Low Band DXing says PM95vq but his address seems to be near Osaka in PM74! 73, Roger -- Remember the USS Liberty (A
/archives//html/Topband/2007-12/msg00031.html (6,646 bytes)

6. Re: Topband: More - lightning protection on 4 sq (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 13 Jun 2008 17:29:11 -0400
I did a quick EZNEC model and adding -4 Ohms reactance (.02 ufd)at the feedpoint of the verticals showed no change in F/B ratio. I would also add a robust spark gap and an RF choke to act as a static
/archives//html/Topband/2008-06/msg00011.html (9,675 bytes)

7. Re: Topband: More - lightning protection on 4 sq (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 13 Jun 2008 21:37:06 -0400
Don't forget that it's the relative phase between the elements that determines the pattern. Adding a small reactance to the feedpoint of each element should not change the relative phase between the
/archives//html/Topband/2008-06/msg00013.html (9,626 bytes)

8. Re: Topband: PolyPhaser Model IS-50UX-C0 (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sun, 15 Jun 2008 11:14:01 -0400
Not quite! The spark gap will arc at the peak voltage on the line. 350 volts peak is only 1225 watts on a 50 Ohm line and that is with a 1 to 1 SWR. There seems to be some confusion between draining
/archives//html/Topband/2008-06/msg00026.html (7,884 bytes)

9. Re: Topband: PolyPhaser Model IS-50UX-C0 (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sun, 15 Jun 2008 21:33:23 -0400
I went back and dug out my Polyphaser manual. The spectrum I remembered was for EMP not lightning! Lightning appears to have a very wide bandwidth with a broad peak near 5kHz (from what I can find on
/archives//html/Topband/2008-06/msg00035.html (9,351 bytes)

10. Re: Topband: 2 wire Beverage transformers (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 20 Jun 2008 16:29:43 -0400
Take a look here, Dave http://www.csgnetwork.com/antennaerpcalc.html 73, Roger -- Remember the USS Liberty (AGTR-5) http://ussliberty.org/ _______________________________________________ Topband mail
/archives//html/Topband/2008-06/msg00054.html (7,488 bytes)

11. Topband: Low band Monitor (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 02 Oct 2008 17:55:09 -0400
Is Lance still in business? Haven't an issue in ages. 73, Roger _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinf
/archives//html/Topband/2008-10/msg00012.html (6,409 bytes)

12. Re: Topband: WD-1A 2-way Beverage (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sun, 23 Nov 2008 08:33:24 -0500
ans Dennis made some actual measurements: "However, be aware that the line loss is relatively high in the reverse, transmission line mode. I tested this line extensively at 1.8 and 3.5 Mhz using appr
/archives//html/Topband/2008-11/msg00173.html (9,743 bytes)

13. Re: Topband: More 160M JA History IViewed from the NA side) (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 28 Nov 2008 08:49:09 -0500
Here is an interesting site about LORAN and vacuum tube transmitters. http://www.locusinc.com/library/2004%20Nuts%20Boltsl1.pdf 73, Roger (formerly 1 megawatt on 1950 from Kodiak, Ak) -- Remember the
/archives//html/Topband/2008-11/msg00258.html (7,792 bytes)

14. Topband: L network matching (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 08 Oct 2009 18:25:26 -0400
I have a nice little program originally written by Dick Wright of Electrospace Systems many years ago. I translated it to Q Basic and it runs fine in a DOS window. There are 8 possible L network conf
/archives//html/Topband/2009-10/msg00118.html (6,784 bytes)

15. Topband: Determining Reversible Beverage Polarity (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 22 Oct 2009 08:45:42 -0400
I must have been sleeping. I can't remember of ever hearing of this issue before. Is this really important? 73, Roger -- Remember the USS Liberty (AGTR-5) http://ussliberty.org/ _____________________
/archives//html/Topband/2009-10/msg00299.html (7,162 bytes)

16. Topband: email (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Thu, 19 Nov 2009 07:43:04 -0500
I received an email purportedly from RX0AE inquiring about DXpedition to zone 23. I'm leery about unsolicited email from that part of the world especially when it was sent to my old email address. Di
/archives//html/Topband/2009-11/msg00382.html (6,351 bytes)

17. Topband: CP4BT (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Tue, 01 Dec 2009 21:15:58 -0500
Anyone rcvd QSL from Claus? Sent card to EA5KB in Sept. No reply. 73, Roger -- Remember the USS Liberty (AGTR-5) http://ussliberty.org/ _______________________________________________ 160 meters is a
/archives//html/Topband/2009-12/msg00006.html (6,190 bytes)

18. Re: Topband: CP4BT (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Mon, 14 Dec 2009 20:45:57 -0500
Received card today! -- Remember the USS Liberty (AGTR-5) http://ussliberty.org/ _______________________________________________ 160 meters is a serious band, it should be treated with respect. - TF4
/archives//html/Topband/2009-12/msg00188.html (7,535 bytes)

19. Re: Topband: Europrean SDR on 160M (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Fri, 01 Jan 2010 10:35:27 -0500
I found the report somewhat disingenuous in that it mentions "fairness" and the "propagation advantage" as considerations. Where is the "fairness" in a W1 whose company sends him to Oregon for severa
/archives//html/Topband/2010-01/msg00014.html (8,628 bytes)

20. Topband: Dayton (score: 1)
Author: Roger D Johnson <n1rj@roadrunner.com>
Date: Sat, 01 May 2010 16:53:54 -0400
I have a room if anyone needs a place to stay and wants to share costs. I also need a ride to Top Band Dinner. 73, Roger _______________________________________________ UR RST IS ... ... ..9 QSB QSB
/archives//html/Topband/2010-05/msg00000.html (5,654 bytes)

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