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Total 200 documents matching your query.

181. Topband: Announcing the 2023 Dayton TopBand Dinner - Annual Event! (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Fri, 13 Jan 2023 06:07:15 -0500
Continuing the great Dayton Top Band Dinner tradition that George, K8GG and George, W8UVZ started, I am proud to announce the Annual Dayton TopBand dinner. Dinner reservations are now available for 2
/archives//html/Topband/2023-01/msg00090.html (7,890 bytes)

182. [CQ-Contest] Announcing 2023 Dayton TopBand dinner speaker (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 2 Feb 2023 12:25:48 -0500
I am excited to announce that Jon Zaimes, AA1K will be our 2023 TopBand dinner speaker Get tickets now https://www.topbanddinner.com/ Jon Zaimes, AA1K is celebrating his 53rd year as an amateur radio
/archives//html/Topband/2023-02/msg00001.html (7,604 bytes)

183. Topband: The 2023 Dayton TopBand dinner - get tickets now (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 2 May 2023 14:05:26 -0400
Jon Zaimes, AA1K will be our 2023 TopBand dinner speaker Get tickets now https://www.topbanddinner.com/ Jon Zaimes, AA1K is celebrating his 53rd year as an amateur radio operator. After learning how
/archives//html/Topband/2023-05/msg00000.html (6,913 bytes)

184. Re: Topband: AM Broadcast Filter recommendation (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 5 Dec 2023 16:48:46 -0500
HI Steve Here is what guys say about the DLW BCB filter (I use these at K3LR) https://www.dxengineering.com/parts/dlw-fl1718/reviews 73 Tim K3LR Hi Guys, I'm looking for a recommendation for an AM Br
/archives//html/Topband/2023-12/msg00018.html (8,060 bytes)

185. Topband: Announcing the 2024 Dayton TopBand Dinner - Annual Event! (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 16 Jan 2024 13:07:34 -0500
Continuing the great Dayton Top Band Dinner tradition that George, K8GG and George, W8UVZ (sk) started, I am proud to announce the Annual Dayton TopBand dinner. Dinner reservations are now available
/archives//html/Topband/2024-01/msg00100.html (8,179 bytes)

186. Topband: Tickets are Available for the 2024 Dayton TopBand Dinner - Annual Event! (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Wed, 6 Mar 2024 22:02:55 -0500
Continuing the great Dayton Top Band Dinner tradition that George, K8GG and George, W8UVZ (sk) started, I am proud to announce the Annual Dayton TopBand dinner. Dinner reservations are now available!
/archives//html/Topband/2024-03/msg00014.html (8,166 bytes)

187. Topband: Tickets are Available for the 2024 Dayton TopBand Dinner - Annual Event! (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Wed, 17 Apr 2024 23:12:28 -0400
Continuing the great Dayton Top Band Dinner tradition that George, K8GG and George, W8UVZ (sk) started, I am proud to announce the Annual Dayton TopBand dinner. Dinner reservations are now available!
/archives//html/Topband/2024-04/msg00031.html (8,192 bytes)

188. Re: Topband: Hi-Z Antennas (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 26 Sep 2024 10:19:55 -0400
HI Mike; I am glad you asked. I do know what is happening and will share here. We are redesigned the outdoor enclosures for many HI-Z products to make them better for outside use. There will be a tim
/archives//html/Topband/2024-09/msg00069.html (8,214 bytes)

189. Re: Topband: AVA-3 buffer amp (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Fri, 27 Sep 2024 13:43:44 -0400
Hello Mark Yes, they are galvanically isolated. 73 Tim K3LR Does AVA-3 galvanically isolate the coaxial and power shield grounds from the ground input post next to the antenna input? Mark Connelly, W
/archives//html/Topband/2024-09/msg00077.html (7,627 bytes)

190. Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sun, 29 Sep 2024 23:05:51 -0400
Greg, W8WWV has done some new work on the VE3DO loop. I use 3 of them here at K3LR. Greg's latest paper is here: http://www.k3lr.com/engineering/VE3DO/OptimizedDOLoop.pdf 73 Tim K3LR ________________
/archives//html/Topband/2024-09/msg00082.html (6,311 bytes)

191. Re: Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 30 Sep 2024 17:44:13 -0400
Hello Ed There is very little interaction between nearby loops. We are studying interlaced loops that are 90 degrees to each other for four azimuth coverage. I would keep the loops at least 25 feet a
/archives//html/Topband/2024-09/msg00093.html (8,459 bytes)

192. Re: Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 1 Oct 2024 12:50:22 -0400
Hello Jim; Yes, encouraging the VE3DO loop for others to try. It has great performance for a small antenna (low cost) on 160 meters as you know. I have used the VE3DO loop here for over 20 years and
/archives//html/Topband/2024-10/msg00002.html (7,456 bytes)

193. Re: Topband: VE3DO loop (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 1 Oct 2024 12:57:56 -0400
Hello Mike; There are a few different "receiver guards" out there. If your receiver guard is a RG5000HD from DX Engineering, you should be OK. As a test, I have put as much as 25 watts into the RG500
/archives//html/Topband/2024-10/msg00003.html (7,861 bytes)

194. Re: Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Wed, 2 Oct 2024 20:11:18 -0400
Hello Wes; The VE3DO loop has a much better front to back ratio compared to a K9AY. The K9AY is easier to erect 73 Tim K3LR From: Wes Stewart [mailto:n7ws@yahoo.com] Sent: Wednesday, October 2, 2024
/archives//html/Topband/2024-10/msg00009.html (8,155 bytes)

195. Re: Topband: E51D Oct 1 (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 3 Oct 2024 22:00:05 -0400
Here is a great high common mode impedance choke that I use just as George explains. At the beginning and end of the feedline to all RX antennas. https://www.dxengineering.com/parts/dxe-rxfc-75 73 Ti
/archives//html/Topband/2024-10/msg00017.html (12,720 bytes)

196. Re: Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 3 Oct 2024 23:13:06 -0400
Hello Lee; Great to hear from you. Yes I have a pair of VE3DO loops spaced 5/8 wave length aimed at Europe (also can be switched to 225). Then a single VE3DO loop for 135/315 degrees. It is all about
/archives//html/Topband/2024-10/msg00019.html (9,746 bytes)

197. Re: Topband: VE3DO loop (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 3 Oct 2024 23:18:21 -0400
Hello Mike; I use this preamp in the shack - at the end of the 50 ohm Heliax that feeds my RX antennas (very low loss): https://www.dxengineering.com/parts/dxe-z10046b-pm I also match my 75 ohm RX an
/archives//html/Topband/2024-10/msg00020.html (9,686 bytes)

198. Re: Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Fri, 4 Oct 2024 10:25:38 -0400
Hello John; The short verticals (I use 23 feet) used for RX only - are not resonant, so they are not nearly as affected as full size (1/4 wavelength) verticals. There is some concern with "active" ve
/archives//html/Topband/2024-10/msg00025.html (9,901 bytes)

199. Re: Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Fri, 4 Oct 2024 11:41:41 -0400
There are great low band antenna suggestions and options explained over the years by Frank, W3LPL during Contest University. You can access Frank's excellent presentations here: https://www.contestun
/archives//html/Topband/2024-10/msg00026.html (11,185 bytes)

200. Re: Topband: Low frequency RX antenna (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Fri, 4 Oct 2024 19:58:46 -0400
The transformer and the resister are very close together. The bottom is 40 feet long - split to feed. I tie to two ground rods. I have no experience with the other questions. 73 Tim K3LR I have a few
/archives//html/Topband/2024-10/msg00029.html (11,093 bytes)


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