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261. Re: Topband: Preamp for 160 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 19 May 2008 20:23:18 -0700
I think you mean "a lot" -- allot is a very different word .:) The quality of RCA connectors varies from very good to awful. For example, Switchraft makes some excellent ones that are gold plated. Yo
/archives//html/Topband/2008-05/msg00049.html (7,070 bytes)

262. Re: Topband: 160m T-loaded vertical antenna (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 28 May 2008 08:40:41 -0700
Hello Jo, We are very encouraged that you are working on your station for topband. When I am on the air around your sunset or my sunrise (currently 1250Z), I often am able to hear and work stations f
/archives//html/Topband/2008-05/msg00066.html (9,113 bytes)

263. Re: Topband: phased beverages (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 31 May 2008 08:35:00 -0700
STUDY the material on W8JI's website. 73, Jim K9YC _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband
/archives//html/Topband/2008-05/msg00074.html (6,970 bytes)

264. Re: Topband: RG8X for Top Band receiving antennas (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 24 Jun 2008 10:56:21 -0700
That's probably because the RG8X is junk and the RG58 is quality stuff. For cable of equal quality, RG8X should be MORE expensive than RG58. Note that RG-specs for coax are broad as a barndoor. Virtu
/archives//html/Topband/2008-06/msg00062.html (7,894 bytes)

265. Re: Topband: Getting started on 160 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 28 Jun 2008 00:01:45 -0700
Be sure to put in as many radials as you can. You're gonna want the amp. Especially from the left coast. Yes. Look forward to working you on topband. 73, Jim K9YC ____________________________________
/archives//html/Topband/2008-06/msg00069.html (7,717 bytes)

266. Re: Topband: Getting started on 160 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 30 Jun 2008 21:32:54 -0700
I appreciate your advice, Bob, and I never owned or used an amp until about four years ago, nor have I ever had aluminum in the air. BUT: 160M is VERY different from the west coast than it is from th
/archives//html/Topband/2008-07/msg00000.html (6,746 bytes)

267. Re: Topband: Power levels on 160 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 01 Jul 2008 08:37:53 -0700
There may be cheaters, but I haven't seen it. What I HAVE seen are guys who generate big signals with serious antenna systems. Google on K9DX, N6RO, K3LR, and W8JI to see examples. I've spent a fair
/archives//html/Topband/2008-07/msg00002.html (7,074 bytes)

268. Re: Topband: Power (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 04 Jul 2008 08:42:45 -0700
And by propagation. Doing the arithmetic -- the difference between 1.5kW and 5kW is 5 dB. Going to 10kW is another 3 dB. As to location -- I'm up 2,000 ft, with a 5 mile downslope to the Pacific, but
/archives//html/Topband/2008-07/msg00023.html (8,525 bytes)

269. Re: Topband: Measuring Inductor Q (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 06 Jul 2008 13:28:35 -0700
Study the test setup and discussion about it in the two pdfs on my website about RFI for Hams and Coaxial Chokes. http://audiosystemsgroup.com/publish Two major obstacles to getting accurate measurem
/archives//html/Topband/2008-07/msg00050.html (9,503 bytes)

270. Re: Topband: Inverted "L" (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 08 Jul 2008 20:07:22 -0700
You're only giving us resistance readings, not reactance. That makes it tough to guess what's going on. The MFJ 259 gives both R and X. A inverted L like yours would have a resistance of 20-30 ohms a
/archives//html/Topband/2008-07/msg00061.html (7,795 bytes)

271. Re: Topband: FT1000 MKV Filters (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 25 Jul 2008 07:19:39 -0700
YES! As it happens, I recently completed a somewhat extensive series of measurements of filters in both my K3 and two FT1000MPs. Most are Inrad filters. They can be downloaded as a pdf with the follo
/archives//html/Topband/2008-07/msg00089.html (8,218 bytes)

272. Re: Topband: RF Shielding of shed/shack (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 10 Aug 2008 21:16:18 -0700
I believe that your concern with shielding is misguided. Before you go to the considerable trouble to try this, I suggest that you study the RFI tutorial on my website. http://audiosystemsgroup.com/p
/archives//html/Topband/2008-08/msg00021.html (8,452 bytes)

273. Re: Topband: August Boring Report (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 13 Aug 2008 08:54:35 -0700
Thanks for the reminder. I managed to roll out this morning in time to work both Bob, VK3ZL, (579-589 with QSB to the noise) and Phil, VK6ABL (339). Bob answered my first CQ, a bit off frequency, but
/archives//html/Topband/2008-08/msg00028.html (7,349 bytes)

274. Re: Topband: Re Boring report.. (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 13 Aug 2008 21:06:44 -0700
Understood. 1300Z is 6 am for me. Not bad if someone's on the other end. 1200Z is tougher. Many thanks for your persistence. I'd pull myself out of bed more often if I knew (or suspected) that you an
/archives//html/Topband/2008-08/msg00030.html (6,937 bytes)

275. Re: Topband: 160m SSB DX (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 18 Aug 2008 11:24:47 -0700
So are 40M around 7040, and all of 30M. Both are frequented by QRPers, many of whom aren't great with CW either. FWIW, I don't hear much CW on 160 slower than 20 WPM, and the only time I hear much th
/archives//html/Topband/2008-08/msg00045.html (7,889 bytes)

276. Re: Topband: Ferrite for loop antenna balun (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 19 Aug 2008 09:13:51 -0700
http://audiosystemsgroup.com/RFI-Ham.pdf See the Choke Cookbook, and the chapter that precedes it. 73, Jim Brown K9YC _______________________________________________ Topband mailing list Topband@cont
/archives//html/Topband/2008-08/msg00049.html (7,334 bytes)

277. Re: Topband: 160m SSB DX (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 19 Aug 2008 10:05:19 -0700
Thanks for all of this info. 73, Jim _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband
/archives//html/Topband/2008-08/msg00051.html (7,146 bytes)

278. Re: Topband: ES1QD QSL Route (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 20 Aug 2008 20:30:40 -0700
He sent me an unsolicited QSL for a May 2004 30M QSO via the Bureau. I received it in Jan 2006. Being VERY lazy about QSLing, I'm just getting around to sending out nearly 1,000 cards, all via the Bu
/archives//html/Topband/2008-08/msg00059.html (6,997 bytes)

279. Topband: LOTW and Rising Postage Costs (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 21 Aug 2008 08:00:40 -0700
I want to again urge all topbanders to use LOTW if you possibly can do so. It takes a bit of effort to get started, but once you do, it can be painless, especially if you use one of the logging progr
/archives//html/Topband/2008-08/msg00063.html (9,032 bytes)

280. Re: Topband: Vertical question (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 05 Sep 2008 06:34:12 -0700
almost That's because twinlead is a BAD way to feed a vertical, which has a rather low impedance at resonance. What you DO need is some means of resonating it on 160 -- that is, making it electricall
/archives//html/Topband/2008-09/msg00010.html (9,252 bytes)

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