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References: [ +from:n9dx@comcast.net: 18 ]

Total 18 documents matching your query.

1. Topband: GR Bridge writeup (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Tue, 4 Nov 2003 23:42:59 -0800
Another source where one might find extensive collections of professional journals (Proceedings of the IRE, the AIEE, or the IEEE) is the engineering department library at most engineering schools. A
/archives//html/Topband/2003-11/msg00026.html (6,378 bytes)

2. Fw: Topband: Ground Radials (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Wed, 12 Nov 2003 23:42:34 -0800
take If I'm not mistaken, moisture must be present, but not air. A wet cell can be overfilled with electrolyte and therefore have no air, but it will still work just fine. Your use of petroleum jell
/archives//html/Topband/2003-11/msg00098.html (8,176 bytes)

3. Topband: Remote coax switching (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Wed, 19 Nov 2003 15:21:59 -0800
Reading all the posts about cores and their problems, I'm wondering why nobody is talking about using remote transistors to switch the relays. Would a large resistance in series with the base (or gat
/archives//html/Topband/2003-11/msg00148.html (6,623 bytes)

4. Topband: remote coax switching (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Wed, 19 Nov 2003 22:56:40 -0800
Thanks to Tom, Don, and Karl for their inputs for three different and useful perspectives. Sounds like solid state is useful for the purpose, but take steps to guard against lightning (good luck!) an
/archives//html/Topband/2003-11/msg00154.html (7,743 bytes)

5. Re: Topband: Non-inductive resistors (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Thu, 18 Dec 2003 18:19:17 -0800
I have to agree with Mauri. Film resistors have very small inductance. Back in the early 60s, I was working in the engineering department of a small company making carbon film and metal film resistor
/archives//html/Topband/2003-12/msg00147.html (8,828 bytes)

6. Re: Topband: MFJ-1026 noise canceller (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Wed, 7 Jan 2004 20:28:21 -0800
for Mine works QSK very well with my old reliable TenTec Corsair. 73, Larry, N9DX _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.
/archives//html/Topband/2004-01/msg00086.html (7,017 bytes)

7. Topband: DC Motor for turning Capacitor? (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Wed, 7 Jan 2004 20:51:35 -0800
Can someone suggest a dc motor for turning a remote capacitor on an inverted L? Sears has a battery operated screwdriver on sale for $9.98, but it is a 150rpm. Any suggestions would be appreciated. P
/archives//html/Topband/2004-01/msg00087.html (7,542 bytes)

8. Topband: Tailending (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Thu, 12 Feb 2004 20:39:18 -0800
A few weeks after I arrived in Saigon (1966) I had occasion to visit the local post office to pick up a letter. I was amazed to find a room full of people waving their letter notices in the air. Upon
/archives//html/Topband/2004-02/msg00203.html (7,768 bytes)

9. Re: Topband: TOP HAT GUY WIRES (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Mon, 6 Sep 2004 00:51:51 -0500
using Hi, Riki I've used that rubber tape for years with excellent results. However, it will not withstand ultraviolet from sunlight. For that reason the rubber tape should be applied first and then
/archives//html/Topband/2004-09/msg00029.html (7,826 bytes)

10. Re: Topband: TOP HAT GUY WIRES (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Mon, 6 Sep 2004 20:30:24 -0500
Good point, Mike. I guess your experience with it has been better than mine. The first time I used rubber tape I didn't cover it with vinyl and within a year it was badly cracked and peeling. Maybe
/archives//html/Topband/2004-09/msg00040.html (8,802 bytes)

11. Re: Topband: Re: short dipoles (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Mon, 18 Oct 2004 13:04:30 -0500
That's true, Tom. As a footnote, of interest to the many who knew Charlie: after he moved to Indiana and became a W9 he continued with a dipole at 35 feet for the first couple of years here. When he
/archives//html/Topband/2004-10/msg00090.html (8,004 bytes)

12. Re: Topband: Inverted L Matching Question (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Wed, 3 Nov 2004 02:24:44 -0500
Probably no evil juju. Melting a coax stub some years ago prompted me to delve into the matter. My melted coax stub was feeding a shunt fed tower. The input inductive reactance looking into the stub
/archives//html/Topband/2004-11/msg00024.html (8,613 bytes)

13. re:topband:receivers (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Fri, 12 Nov 2004 13:58:01 -0500
...It is also true that this ham will not be working inside my Orion but I can fix my B/C line... True. But this reminds me of a conversation with a friend about automotive improvement. When I said I
/archives//html/Topband/2004-11/msg00104.html (6,864 bytes)

14. Re: Topband: Magic 'T' Combiners (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Fri, 14 Jan 2005 22:14:19 -0500
at If each antenna's input impedance is 50 ohms, and each feedline is 70.7 ohms and an odd number of quarter waves long, each 50 ohms is transformed to 100 ohms. Two 100 ohm loads tied together in p
/archives//html/Topband/2005-01/msg00192.html (8,478 bytes)

15. Re: Topband: Another DXpedition 160 Vertical Idea (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Thu, 27 Jan 2005 16:44:22 -0500
It is often said that no radials are required for vertical dipoles. If the criterion is simply the ability to make QSOs, then the statement is correct. However, it is also true that vertical dipoles
/archives//html/Topband/2005-01/msg00305.html (8,390 bytes)

16. Re: Topband: Another DXpedition 160 Vertical Idea (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Fri, 28 Jan 2005 02:14:52 -0500
Thanks for that info, Rick. Measurements are hard to argue with. And your results make sense. small points the current induced by the E field diminishes as the square of the distance between the cha
/archives//html/Topband/2005-01/msg00310.html (8,778 bytes)

17. Re: Topband: "Is your feedline also an antenna?"]] (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Mon, 10 Oct 2005 02:56:05 -0500
,,,Those hum bars are for a large part caused by For safety reasons, power line neutrals should only be connected to power line loads. Any other connection is a ground fault and is dangerous. The pow
/archives//html/Topband/2005-10/msg00036.html (9,565 bytes)

18. Re: Topband: Engineering ?? @ relays (score: 1)
Author: "Larry Higgins" <n9dx@comcast.net>
Date: Tue, 25 Oct 2005 18:04:17 -0500
Back in the days before digital tv tuners, when channels were selected by mechanical switches, contact oxidation was an ongoing problem. I worked for a tv shop for a few years back then. Tuner clean
/archives//html/Topband/2005-10/msg00270.html (9,924 bytes)

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