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Total 320 documents matching your query.

241. Topband: Antenna Engineers gone wild (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Mon, 6 Sep 2010 14:23:56 -0400
This is a real, no joke video of a new 2 to 400 MHz seawater antenna. Our tax dollars at work. But an interesting concept. Dumb, but interesting. Brad KD1BL sent me this very interesting idea for an
/archives//html/Topband/2010-09/msg00016.html (6,576 bytes)

242. Re: Topband: Fair Rite part number 2873000202 (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Tue, 7 Sep 2010 18:49:42 -0400
Have you tried Amidon in the US? https://www.amidoncorp.com/ Sent from my iPad _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
/archives//html/Topband/2010-09/msg00023.html (8,048 bytes)

243. Re: Topband: Pneumatic device for throwing antenna wire over the top ofa tree (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Fri, 15 Oct 2010 07:48:03 -0400
I agree slingshots are very difficult to get accuracy with because of how you have to hold the weight AND they often lack power at steep angles or heights over 60 ft. But I don't know about using suc
/archives//html/Topband/2010-10/msg00059.html (9,823 bytes)

244. Re: Topband: Pneumatic device for throwing antenna wire over the top ofa tree (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Fri, 15 Oct 2010 07:50:29 -0400
Yes but with a little practice and a keen eye you can manually pull on the launched fishing line to prevent it from overshooting the target or worse, go wild. HOWEVER, be careful it doesn't arc backw
/archives//html/Topband/2010-10/msg00060.html (11,850 bytes)

245. Re: Topband: Fw: The Slingshot Option (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Tue, 19 Oct 2010 19:08:23 -0400
Just one additional safety thing - look out for a bounce back if the arrow hits a tree trunk or branch. They can come right back to the origin very quickly. I always remove the original arrow tip as
/archives//html/Topband/2010-10/msg00092.html (13,220 bytes)

246. Re: Topband: Some eye candy (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Thu, 11 Nov 2010 23:00:12 -0500
I have seen worse. K1AJL had a single 833 on two bricks on top of a dirt basement floor with the tank circuit simply seated on plywood on the same floor. The amp was keyed from a room directly upstai
/archives//html/Topband/2010-11/msg00054.html (7,936 bytes)

247. Re: Topband: Beverage under ice (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Sat, 5 Feb 2011 19:26:40 -0500
Same scenario here with BOG. Sensitivity way down but directivity appears same. I may run a new wire on top of the ice cap which is a couple feet thick at this point in NNJ. Prob not solid all way th
/archives//html/Topband/2011-02/msg00061.html (7,790 bytes)

248. Re: Topband: Web SDR's and 'Cheating' (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Fri, 11 Feb 2011 11:09:05 -0500
Why not just use SKYPE? Could have a packaged service which includes band noise, QRM, etc. Like Dr DX but via SKYPE. QST can do a full tech review. For once it may be meaningful too. Sent from my iPa
/archives//html/Topband/2011-02/msg00096.html (9,243 bytes)

249. Re: Topband: Web SDR's and 'Cheating' (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Sat, 12 Feb 2011 08:38:25 -0500
Thats a great use Herb .. FWIW - I am not a contester or an awards collector but I am a serious dx'er. Technology concerns aside for how the various new things can be abused, I really think the singl
/archives//html/Topband/2011-02/msg00126.html (11,014 bytes)

250. Re: Topband: Pixel Technologies Magnetic RX Loop (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Mon, 9 May 2011 07:15:39 -0400
The only thing which would make this "better" than the usual mag loop is better balance - but W8JI has shown a single wire loop can be much easier to balance than the coax. Not sure how broad banded
/archives//html/Topband/2011-05/msg00010.html (9,938 bytes)

251. Re: Topband: Pixel Technologies Magnetic RX Loop (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Mon, 9 May 2011 07:12:52 -0400
I notice they repeat the incorrect assertion that these magnetic loops work by being sensitive to the "magnetic field" rather than the electric field and that has been long shown to be false - these
/archives//html/Topband/2011-05/msg00011.html (10,486 bytes)

252. Re: Topband: Pixel Technologies Magnetic RX Loop (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Mon, 9 May 2011 18:27:44 -0400
Andy. Again, it's the laws of physics which apply. The mag loop can only be sensitive go the magnetic field and less so to the E field only if it is very very close to noise source. That's just the w
/archives//html/Topband/2011-05/msg00016.html (10,673 bytes)

253. Re: Topband: Pixel Technologies Magnetic RX Loop (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Tue, 10 May 2011 09:12:31 -0400
I have actually heard several people - some very experienced 160 DX'ers observe that the magnetic loop can null noise without facing the null to it by raising it's height. K2DSY said he found elevati
/archives//html/Topband/2011-05/msg00019.html (13,500 bytes)

254. Re: Topband: Asymmetric radials for GP antennas; Just in case others seek what I've just found... (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Wed, 18 May 2011 08:13:49 -0400
I have the same experience .. a number of short radials and a few long ones, but only in a 180 degree pattern because of the lot lines and an ill tempered neighbor. I have several tower sections unus
/archives//html/Topband/2011-05/msg00055.html (13,427 bytes)

255. Re: Topband: EZNEC circular loop (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Thu, 25 Aug 2011 13:16:11 -0400
There is a standalone tool to create loop files for EZNEC too .. that is perhaps what they built into V5 ... I have it on a pc around here if someone wants it - it was a freeware thing. Worked well w
/archives//html/Topband/2011-08/msg00069.html (8,533 bytes)

256. Re: Topband: Fence "ground screen" instead of wire radials? (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Sun, 11 Sep 2011 21:38:00 -0400
Why would it be notable for the radials to be bonded to the perimeter of the mesh and not overlaid on the mesh and connected directly to the field point? Sent from my iPad ___________________________
/archives//html/Topband/2011-09/msg00069.html (11,151 bytes)

257. Re: Topband: Effect of current max not at base of vertical (score: 1)
Author: Pete W2PM <w2pm@aol.com>
Date: Mon, 26 Sep 2011 20:17:03 -0400 (EDT)
I onvce did a observational study like this with W2JPW who lives 3 miles from my QTH. We did the test on all bands from 160 to 2 meters using zero gain omni directional antennas. On 160, with 1500W h
/archives//html/Topband/2011-09/msg00138.html (8,850 bytes)

258. Re: Topband: Effect of current max not at base of vertical. (score: 1)
Author: Pete W2PM <w2pm@aol.com>
Date: Mon, 26 Sep 2011 20:12:26 -0400 (EDT)
Re signal improvements when over fresh water or swamp I've notice that many times on VHF or FM radio in the car and always simply suspected the effects of being in the clear without obstructions like
/archives//html/Topband/2011-09/msg00139.html (13,679 bytes)

259. Re: Topband: Counterpoise very interresting (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Wed, 23 Nov 2011 09:07:28 -0500
Who is LB?? Sent from my iPad _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
/archives//html/Topband/2011-11/msg00222.html (13,049 bytes)

260. Re: Topband: Flag/Pennant Question (score: 1)
Author: W2PM <w2pm@aol.com>
Date: Mon, 28 Nov 2011 21:49:40 -0500
Why would you do that? Sent from my iPhone _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
/archives//html/Topband/2011-11/msg00272.html (7,147 bytes)


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