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Total 218 documents matching your query.

141. Re: Topband: The WD8DSB mini-flag antenna (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Wed, 24 Feb 2021 09:32:43 -0500
Don, I put that note out because friends were asking if with a "ultra-low-noise" pre-amp they could use it for DX. Unfortunately, that's not the case. (I have tried.) Of course, that does not diminis
/archives//html/Topband/2021-02/msg00115.html (16,655 bytes)

142. Re: Topband: Antenna thoughts (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Tue, 02 Mar 2021 09:28:47 -0500
John, For DX, the T will be better than the L, especially if part of the L is sloping. (Higher radiation resistance.) Also, if the two loading wires are the same length, the antenna will be good on 3
/archives//html/Topband/2021-03/msg00004.html (7,941 bytes)

143. Re: Topband: Portable transmit antenna suggestions? (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Wed, 10 Mar 2021 13:24:16 -0500
I have been using Spiderpoles on DXpeditions and at C6AGU for many years. Yes, they are not very strong, but with proper guying, I have seen them stand up to 80 mph winds. For 160, when using top loa
/archives//html/Topband/2021-03/msg00091.html (9,354 bytes)

144. Re: Topband: final from me -- Remotes (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Wed, 10 Mar 2021 22:30:33 -0500
Hans, On remotes: When somebody builds a station in Haiti and operates it remotely, he has just enabled people to work Haiti, which may not happen otherwise. As long as there is no pretense of someth
/archives//html/Topband/2021-03/msg00106.html (10,633 bytes)

145. Topband: Operation from Deucy (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Thu, 01 Apr 2021 01:46:44 -0400
C6AGU will be QRV from Deucy from Apr 5 to Apr 6, 2021. Operators will be KN4EEI and AA7JV. Modes will be CW and FT8, 160, 80 and 40 m. For details go to C6AGU at QRZ.com. George, AA7JV _____________
/archives//html/Topband/2021-04/msg00000.html (6,169 bytes)

146. Re: Topband: 160m CW Activity (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Sat, 03 Apr 2021 15:31:43 -0400
Last Wednesday night QRN on my TX antenna was fluctuating between -100 dBm and -80 dBm (as shown on the Flex 6700 + Maestro waterfall) and S9 to S9+10dB on the S meter. I was on the band and could co
/archives//html/Topband/2021-04/msg00018.html (8,149 bytes)

147. Re: Topband: Great Engineering by AA7JV (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Mon, 05 Apr 2021 17:41:31 -0400
Here is the clarification of the new DXCC rules relating to this: The DXCCRules <http://www.arrl.org/dxcc-rules> changes, which affect Section I, subsections 8 and 9, explain andextend how contacts w
/archives//html/Topband/2021-04/msg00031.html (10,732 bytes)

148. Re: Topband: Signal source RF amplifier (score: 1)
Author: GEORGE WALLNER <aa7jv@atlanticbb.net>
Date: Mon, 03 May 2021 09:17:13 -0400
Hello Steve, I have built exactly what you are looking for: a small 200 mW transmitter that can be attached to a drone (including battery). For the "PA" stage a I used a 74HC244 buffer, with all the
/archives//html/Topband/2021-05/msg00007.html (8,375 bytes)

149. Re: Topband: AA7JV/mm this morning (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Tue, 31 Aug 2021 10:43:23 -0400
Thanks Andree, PWR here was 1 kW and the antenna a 42 ft vertical fed via a tuner. (Plus a salt-water ground!) I was at anchor in the outer harbor in Camden (ME) and there was quite a bit of noise fr
/archives//html/Topband/2021-08/msg00032.html (7,912 bytes)

150. Re: Topband: Unsubscribing (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Fri, 17 Sep 2021 19:44:37 -0400
Greg, It is always unsettling to move to a place with unknown radio potential. I had a 5 acre hill-top antenna farm in Arizona but relocated to a 3/4 acre property on Miami Beach. I found that what I
/archives//html/Topband/2021-09/msg00054.html (8,729 bytes)

151. Re: Topband: Skirted vertical antennas for MF broadcast (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Fri, 08 Apr 2022 11:12:07 -0400
I have been using at C6AGU a similar design that I call "Fat Vertical". Scroll down on the C6AGU QRZ.com page to see a picture of it. The antenna is 60' tall with sloping loading wires attached to th
/archives//html/Topband/2022-04/msg00020.html (9,789 bytes)

152. Re: Topband: 160 contest; dits and dahs; propagation (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Fri, 09 Dec 2022 13:54:24 -0500
We normally make 1300 Q-s in this contest. This year, with a lot of hard work, only 994. Propagation had to be very selective. C6AGU was consistently 20 - 24 dB on the W3LPL RBN, but not heard at W3H
/archives//html/Topband/2022-12/msg00055.html (9,225 bytes)

153. Re: Topband: Cndx in the ARRL 160 Test. (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Mon, 12 Dec 2022 13:37:34 -0500
Bob, Before the contest we were on 160 a number of nights. Only a few nights were we able to work more than a handful of EU stations and they were all much weaker than normal. Regular S7 stations, li
/archives//html/Topband/2022-12/msg00064.html (12,638 bytes)

154. Re: Topband: Conditions for Stew Perry Contest (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Mon, 19 Dec 2022 09:46:49 -0500
I was operating /MM from St. Martin (FK88) and both the NA and EU stations were weak. OK2CF, who is normally a solid S7 in FL was barely above the noise. Conditions were either very poor or everybody
/archives//html/Topband/2022-12/msg00076.html (7,657 bytes)

155. Re: Topband: Antennas and saltwater (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Mon, 19 Dec 2022 17:18:45 -0500
If the antenna stands in the salt-water or if you have a short, low impedance connection to the water, you don't need radials. During the VK9WWI DXpedition to Willis Islets, we installed a vertical o
/archives//html/Topband/2022-12/msg00079.html (9,030 bytes)

156. Re: Topband: Antennas and saltwater (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Mon, 19 Dec 2022 21:17:11 -0500
On boat you need to put a capacitor (22 nF or greater) in series with the GND connection. That will stop DC from "melting" your sacrificial anodes. GW On Mon, Dec 19, 2022, 16:18 W7TMT - Patrick <W7T
/archives//html/Topband/2022-12/msg00089.html (12,031 bytes)

157. Re: Topband: Small Loop does not receive weak signal on 160m BOUVET RX SPOILER (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Sun, 25 Dec 2022 10:36:06 -0500
In my experience, a DXpedition does not need an RX antenna on 160 for the first two to three days. During that time they are working the big guns with strong signals. The RX antenna is needed to give
/archives//html/Topband/2022-12/msg00137.html (28,712 bytes)

158. Re: Topband: spot (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Mon, 09 Jan 2023 15:37:48 -0500
What size a rhombic would be "large" on 160 m? Perhaps long enough for far end to be close to the other station. 73, George Sorry, but extraordinary claims require extraordinary proof. 73, Steve, N2I
/archives//html/Topband/2023-01/msg00081.html (9,288 bytes)

159. Re: Topband: 160 ain't dead yet. (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Thu, 23 Feb 2023 05:32:49 -0500
I heard OK1CF calling CQ. Karel was a real 599. He came back and gave me 599+. Later, OM2WX called with a very solid signal. A couple of other weak EU stations later, but I had to go on watch and cou
/archives//html/Topband/2023-02/msg00054.html (7,763 bytes)

160. Topband: FO/AA7JV on TB (Marquesas) (score: 1)
Author: "GEORGE WALLNER" <aa7jv@atlanticbb.net>
Date: Mon, 20 Mar 2023 00:02:43 -0400
FO/AA7JV will be on TB Sunday night /Monday AM (Mar 21), from about 0530 UTC. CU and 73, George, AA7JV _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
/archives//html/Topband/2023-03/msg00018.html (6,941 bytes)

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