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241. Re: Topband: WA0RCR Saturday evening "new" broadcasts 1860 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 02 Mar 2008 22:09:14 -0800
I can tell you that when I was in Chicago, it was VERY unwelcome during contests. 73, Jim K9YC _______________________________________________ Topband mailing list Topband@contesting.com http://lists
/archives//html/Topband/2008-03/msg00005.html (7,218 bytes)

242. Re: Topband: End Fed Twin Lead Marconi Antenna (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 04 Mar 2008 08:56:24 -0800
If you can hoist a wire (or that twinlead) to the height you've described, the best way to utilize it is as a top-loaded vertical Tee. Simply tie both sides of that feedline together at the ground an
/archives//html/Topband/2008-03/msg00011.html (8,555 bytes)

243. Re: Topband: TX5C (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 10 Mar 2008 08:15:44 -0800
Expect that to change. They're only about 2,000 miles from me, so I hear them pretty well on most bands. They worked EU most of last night on 75M, then JA this morning. The website for this DXpeditio
/archives//html/Topband/2008-03/msg00023.html (7,690 bytes)

244. Re: Topband: TX5C (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 10 Mar 2008 14:45:13 -0800
I've got two transmit antennas here for topband -- an 86 ft top loaded Tee vertical and a dipole at 110 ft broadside to about 55 degrees. For some reason, the dipole has been almost 10 dB better than
/archives//html/Topband/2008-03/msg00029.html (8,626 bytes)

245. Re: Topband: Laptop AC Adapter QRM (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 11 Mar 2008 16:46:43 -0800
Sure. Take it back and get your money back. Before you do, measure the DC voltage. Then look for a linear DC power supply that puts out that voltage. Or build one. Power supplies are simple. You migh
/archives//html/Topband/2008-03/msg00046.html (7,155 bytes)

246. Re: Topband: TX5C - Patience! (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 11 Mar 2008 17:35:37 -0800
They're on a tiny island in the tropics, and they're having REALLY rough WX. While working through simultaneous 10M pileups on both CW and SSB, they had to break several times for lightning storms, h
/archives//html/Topband/2008-03/msg00048.html (7,104 bytes)

247. Re: Topband: Conditions Mar 12/13 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 14 Mar 2008 11:41:07 -0800
Hi Merv, Don't overlook the significance of the vertical pattern. You never know what the path from you to them is going to be -- high angle, low angle, in between. The few times I've worked AF from
/archives//html/Topband/2008-03/msg00055.html (7,745 bytes)

248. Re: Topband: JA Opening this morning (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 24 Mar 2008 12:11:50 -0700
And don't roll them up at all unless you must. Remember that when it is summer in North America it is winter in the southern hemisphere. So while it's tougher for us to hear during our summer, it's m
/archives//html/Topband/2008-03/msg00071.html (7,452 bytes)

249. Re: Topband: EA6 Report (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 27 Mar 2008 10:11:30 -0700
I've seen a post here saying that Remi works full QSK, so he expects us to call while he's calling. Also, Remi talks better than he hears. My QTH gives me a quite good jumping off place to the Pacifi
/archives//html/Topband/2008-03/msg00077.html (7,339 bytes)

250. Topband: Good Morning in CA (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 08 Apr 2008 07:25:12 -0700
Signals were quite good in Santa Cruz this morning (70 miles south of the Golden Gate Bridge). VK6ABL was solid copy for more than an hour, and answered my first call at 1240Z, and said on the cluste
/archives//html/Topband/2008-04/msg00008.html (7,296 bytes)

251. Re: Topband: Balun for a balanced tuner ? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 08 Apr 2008 13:10:24 -0700
use. Martin, I suggest that you study the sections of my tutorial that address antenna balance and the section on common mode chokes (commonly called "current baluns." http://audiosystemsgroup.com/RF
/archives//html/Topband/2008-04/msg00013.html (8,421 bytes)

252. Re: Topband: Source for wire? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 10 Apr 2008 08:06:09 -0700
Note that aluminum does not hold up well with some soil chemistry. A good wire to use for radials is #18 insulated copper. It's cheaper than larger wire, large enough to hold up reasonably well, the
/archives//html/Topband/2008-04/msg00021.html (7,693 bytes)

253. Re: Topband: Source for wire? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 10 Apr 2008 14:18:55 -0700
As usual, you ask a very good question. I buy and scrounge scrap wire wherever I can find it -- hamfests (what Easterners and MidWesterners call swap meets), surplus stores, etc. Out here in Silicon
/archives//html/Topband/2008-04/msg00026.html (8,887 bytes)

254. Re: Topband: 160M Loop (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 13 Apr 2008 17:36:07 -0700
Probably half the Beverages in the world go through either forests or fields. Mine go through a dense forest, and they work fine. Same for my neighbor, K6XX. In fact, trees are great because they giv
/archives//html/Topband/2008-04/msg00042.html (7,478 bytes)

255. Re: Topband: Crooked beverage (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 14 Apr 2008 14:40:20 -0700
Sure. My two Beverages go down and up as they follow the land sloping down to a creek, then back up to a considerable rise. Elevation is far from constant, and they zig and zag a bit. They may not be
/archives//html/Topband/2008-04/msg00046.html (7,425 bytes)

256. Re: Topband: Pleasant surprise this morning (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 14 Apr 2008 15:44:56 -0700
I've been lazy about early rising for several months, but in the last 10 days have been on the air 30-60 minutes before sunrise, sometimes earlier. Most days, VK6ABL and I can work. On a good day, he
/archives//html/Topband/2008-04/msg00048.html (7,900 bytes)

257. Re: Topband: Final reminder - Annual Top Band Dinner @ Dayton (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 01 May 2008 10:49:55 -0700
I won't be in Dayton, but I just heard/saw K3NA's VP6DX presentation in Visalia, and it was great! I would expect John's talk to be equally good. 73, Jim K9YC ________________________________________
/archives//html/Topband/2008-05/msg00002.html (7,322 bytes)

258. Re: Topband: Cage Vertical Worth It? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 02 May 2008 20:39:41 -0700
This is well known good engineering practice, and I'm thinking about doing it myself. No debate. But unless you have a very low power feedline, any reasonable tuner will make up the difference in ban
/archives//html/Topband/2008-05/msg00006.html (7,591 bytes)

259. Re: Topband: Reyco Traps on Topband?? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 05 May 2008 18:51:21 -0700
That's REAL short for 160 -- would take a LOT of loading. Look at Hypower Antenna Co (small ad in back of QST and also internet). He's got some nice loaded dipoles. Maybe he has one that short. I've
/archives//html/Topband/2008-05/msg00017.html (7,723 bytes)

260. Re: Topband: Radials (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 16 May 2008 07:53:55 -0700
Thanks to copper speculators, wire is no longer cheap, but it still costs a LOT less than a power amp (or the electricity to run the amp). Use what you have, but don't stop at 75 ft of "found" wire -
/archives//html/Topband/2008-05/msg00044.html (7,027 bytes)

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