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Total 256 documents matching your query.

201. Re: Topband: [TowerTalk] Skip Distance (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Fri, 13 Sep 2019 12:52:18 -0400
Just remembered one other thing, the hours I use are SOLAR noon to SOLAR 2 pm. Where I live daylight time 10 am is 9 am standard time, and 8:50 am Solar time. In Lexington, Ky, USA that would be 8:23
/archives//html/Topband/2019-09/msg00061.html (9,865 bytes)

202. Re: Topband: PreStew coming next weekend (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sun, 13 Oct 2019 16:03:26 -0400
Hi, Dave, Can't know the final score until all the logs with their TX power levels show up at Tree's place. What N1MM shows is as good as any beforehand. But there is no way to know points for workin
/archives//html/Topband/2019-10/msg00113.html (11,764 bytes)

203. Re: Topband: AIM-4300 Discontinued (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sun, 27 Oct 2019 08:21:49 -0400
Hi Sam, Not particularly surprising as technology has caught up and you can get a two port VNA for $50. Chinese knockoff of a European device with an absolutely ghastly user manual. But it shows no f
/archives//html/Topband/2019-10/msg00184.html (8,712 bytes)

204. Re: Topband: BOG Beverage on Ground Help (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sun, 1 Dec 2019 14:02:41 -0500
BOG is not a Beverage. So don't think about or treat a BOG like a Beverage. The relationship between a Beverage and a BOG is like the relationship between an Otter and a Platypus. Both are aquatic ma
/archives//html/Topband/2019-12/msg00006.html (15,530 bytes)

205. Re: Topband: BOG Beverage on Ground Help (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Tue, 3 Dec 2019 16:18:45 -0500
I agree with Bob. I think the name BOG is firmly entrenched, whatever the electrical differences. Oh, I could propose a new name, but I doubt it would ever stick. I'll go back to my Otter/Platypus to
/archives//html/Topband/2019-12/msg00011.html (11,450 bytes)

206. Re: Topband: K9ay loop not performing (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Tue, 10 Dec 2019 13:44:58 -0500
Pete, See RF parts.com, search vacuum relay VC2T-13.2. SPDT will allow you to change your mind about what state you want with no voltage to winding. And you will not need to buy a 24 volt power suppl
/archives//html/Topband/2019-12/msg00096.html (10,496 bytes)

207. Re: Topband: K9ay loop not performing (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Tue, 10 Dec 2019 13:54:09 -0500
The need to disconnect the feedline shield is to block common mode signals. A K9AY approved **EXCELLENT** common mode block (not a regular "balun" with likely awful blocking on 160m), or (GASP) an is
/archives//html/Topband/2019-12/msg00097.html (10,205 bytes)

208. Re: Topband: de n7dd (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Fri, 10 Jan 2020 16:46:54 -0500
Issues of a fixed capacitor as seen in this thread have been a similar problem for a network two-banding an 160m Inv L over FCP. k2av.com has a section on this problem how to do 500 with three 170 pf
/archives//html/Topband/2020-01/msg00122.html (9,728 bytes)

209. Topband: K2AV Trident L (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sat, 11 Jan 2020 12:47:17 -0500
Starting with a 160 inverted L/FCP, we first added 80 by tuning the aerial wire/FCP as an end-fed half-wave L. That's been up, works very well, off beta status. But 40 meters was always a killer. Man
/archives//html/Topband/2020-01/msg00161.html (7,364 bytes)

210. Re: Topband: CQ WW Contest (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Tue, 28 Jan 2020 22:10:30 -0500
Hi Roger, Just want to be sure we are both talking about the weekend of 25, 26 January, 2020, the weekend of the 2020 CQ 160 CW contest. If so, I must register my decidedly firm impression that was t
/archives//html/Topband/2020-01/msg00352.html (8,792 bytes)

211. Re: Topband: T Top Verticals and yagis (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Fri, 28 Feb 2020 12:15:40 -0500
Thats an awful lot of effort just to keep a T top. There are a number of effective alternatives to the traditional T top without the interaction drawbacks. Inverted L is only the dirt simple one with
/archives//html/Topband/2020-02/msg00251.html (8,347 bytes)

212. Re: Topband: T Top Verticals and yagis (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sat, 29 Feb 2020 12:56:12 -0500
Have to disagree on the no-use-for the horizontal leg. It fills in the doughnut hole in the high angle radiation, which in contests is very good for keeping others from planting on your run frequency
/archives//html/Topband/2020-02/msg00276.html (10,912 bytes)

213. Re: Topband: Slightly OT - amplifier noise (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Mon, 16 Mar 2020 14:27:12 -0400
Depending on the exact circuit and device, to measure noise from the device itself, dont you have to terminate the inputs to put the normal impedance on them? The circuits are often designed with the
/archives//html/Topband/2020-03/msg00197.html (10,074 bytes)

214. Re: Topband: Ground Conductivity (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Wed, 25 Mar 2020 15:07:12 -0400
Rudy is not the only one taking measurements. I've been doing EZNEC since 1996 (v2) and NEC4/EZNEC Pro since 2002. The latter cost me well over a thousand bucks, but has been well worth it in the lon
/archives//html/Topband/2020-03/msg00329.html (19,596 bytes)

215. Re: Topband: Anyone QRV in ND? (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sat, 4 Apr 2020 14:38:25 -0400
In the past two ARRL 160 and two CQ 160 CW contests, I worked the following with ND in their exchange. I checked, they all have QRZ.com addresses in ND as of today. I worked K0IDX in two contests, th
/archives//html/Topband/2020-04/msg00013.html (8,781 bytes)

216. Re: Topband: Measure dipole on ground to get VF of BOG. (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sat, 2 May 2020 17:55:17 -0400
Hi, Mikek, BOGs have a very miscellaneous performance, some love 'em, some hate 'em, nobody telling a lie. One part of a back yard can have a heated BOG argument with a different part of the same bac
/archives//html/Topband/2020-05/msg00004.html (12,278 bytes)

217. Re: Topband: KV4FZ from the eyes of the USVI (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Mon, 4 May 2020 12:07:09 -0400
Thanks for the URL 73, Guy K2AV _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
/archives//html/Topband/2020-05/msg00012.html (7,347 bytes)

218. Re: Topband: CAT6 Feed Line (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Tue, 26 May 2020 15:05:11 -0400
Hi Mikek, The trick is to remember that just one common mode block rarely does the trick. Usually if it's bad the first one will make a difference. The second maybe not at all. What happens with the
/archives//html/Topband/2020-05/msg00113.html (9,450 bytes)

219. Re: Topband: Tuning a 2el parasitic array (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Sun, 21 Jun 2020 15:30:25 -0400
With the era of cheap VNA's it does seem time to move forward. Especially with wire yagi's, you can get VNA's with smartphone style 5V USB charged batteries that talk to a tablet running supplied sof
/archives//html/Topband/2020-06/msg00046.html (11,736 bytes)

220. Re: Topband: Shunt Fed Tower SWR Troubles (score: 1)
Author: Guy Olinger K2AV <k2av.guy@gmail.com>
Date: Thu, 27 Aug 2020 13:37:02 -0400
Hi Dale, The RF voltage is always looking at the far end (stuff on the end away from the tower base) to jump onto. ** Provide a deliberate, designed, long-term weather survivable metallic path to the
/archives//html/Topband/2020-08/msg00075.html (11,267 bytes)

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