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Total 263 documents matching your query.

141. Re: Topband: K1N DQRM Tracking Project (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sun, 8 Feb 2015 15:46:51 -0800
Greetings top-band community, Interestingly enough the technology exists right here in our own Ham community that could go a long way toward finding these DQRM culprits. There are some beam forming a
/archives//html/Topband/2015-02/msg00348.html (9,723 bytes)

142. Re: Topband: K1N DQRM Tracking Project (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sun, 8 Feb 2015 18:31:20 -0800
No of course not Peter, I think it would work fairly well on one hop and ground wave signals judging from my experience with narrow beam arrays. As much skewing as we see on distant signals and the f
/archives//html/Topband/2015-02/msg00351.html (9,734 bytes)

143. Re: Topband: HVDC (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Wed, 11 Feb 2015 10:08:28 -0800
You don't step off a combine when harvesting under HVAC lines. You learn to jump off real quick. I think it is capacitive coupling. The larger combines pack a real wallop when under HVAC lines. I liv
/archives//html/Topband/2015-02/msg00392.html (12,044 bytes)

144. Re: Topband: Rune Øye shared (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Mon, 23 Mar 2015 16:32:03 -0700
Greetings Rune, Your selection of 30 ohms for the 90 degree cable is likely the cause. If you calculate 90 degrees of cable looking into 16.5 ohms you actually get 54.55 ohms transformation. If you h
/archives//html/Topband/2015-03/msg00195.html (8,000 bytes)

145. Topband: HMC580 instead of W7IUV preamp (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Fri, 28 Aug 2015 16:30:52 -0700
Mouser has them in other packaging. http://www.mouser.com/Search/Refine.aspx?Keyword=HMC580ST89ETR Lee K7TJR _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2015-08/msg00098.html (6,622 bytes)

146. Topband: KD9SV-OK1RR relays ??? (RX Front End Protector) (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sun, 30 Aug 2015 18:11:06 -0700
Hmmm, I wonder why the Array Solutions circuit board picture shows MCL 1:1 transformers. Sounds fishy to me. Even the waveform pictures show clipping at a 1:1 with one diode voltage. Hmmm? Lee K7TJR
/archives//html/Topband/2015-08/msg00136.html (6,561 bytes)

147. Topband: KD9SV-OK1RR relays ??? (RX Front End Protector) (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sun, 30 Aug 2015 21:16:36 -0700
Sorry Charlie, I don't think I made my thoughts very clear. James was quoting from a QST article that there was an impedance transformation because of the transformers. This was to make a higher volt
/archives//html/Topband/2015-08/msg00140.html (8,127 bytes)

148. Topband: KD9SV-OK1RR relays ??? (RX Front End Protector) (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sun, 30 Aug 2015 21:44:06 -0700
I believe the point of having the transformers in their circuit is to limit the maximum output. A transformer (ferrite in this case) can only output whatever maximum current determined by the core sa
/archives//html/Topband/2015-08/msg00143.html (7,650 bytes)

149. Topband: Waller Flag (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 8 Sep 2015 13:01:29 -0700
I must be missing something. The noise in a 50 ohm resistor is -174 dbm per root Hz at ambient temp. Lets take 100Hz bandwidth for the receiver and the noise becomes -154 dbm or .0045 uVolts Lets add
/archives//html/Topband/2015-09/msg00046.html (7,522 bytes)

150. Re: Topband: Waller Flag (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 8 Sep 2015 18:54:26 -0700
After putting my conclusions here and a 2 1/2 hour power outage I had an aha moment and found I did not account for 40 db properly. The dipole without a preamp in the same location is just a few db h
/archives//html/Topband/2015-09/msg00051.html (7,263 bytes)

151. Re: Topband: Carrier on 1814.0 kHz (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sun, 10 Jan 2016 18:02:10 +0000
Hello John and top banders. I have been hearing what appears to be the same on/off carrier transmission. I also hear one up near 1830 at the same time. The same slow CW tones. I believe these transmi
/archives//html/Topband/2016-01/msg00172.html (8,195 bytes)

152. Re: Topband: 160M WAS - ND (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sun, 10 Jan 2016 22:37:55 +0000
Jim, look up KD4POJ on QRZ for his e-mail. He is on the top-band reflector all the time and he is in ND with 160 meter capabilities. Lee K7TJR I thought 160 WAS is finished after confirming NE. Wrong
/archives//html/Topband/2016-01/msg00175.html (7,519 bytes)

153. Re: Topband: 4SQ vs. 8 circle rcv (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Wed, 13 Jan 2016 20:06:45 +0000
Hi Guys, I have just updated my antenna comparison chart with some enlightening plots that show antenna comparison in 3D. Interestingly enough my experience is as you get to the higher RDF antennas e
/archives//html/Topband/2016-01/msg00213.html (10,650 bytes)

154. Topband: XZ4ZW (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 19 Jan 2016 18:31:52 +0000
I was super pleased to work Ken K4ZW on 160 this morning while he is in XZ as XZ4ZW. Ken had been trying to work North America for three days when the band finally opened a bit and several West coast
/archives//html/Topband/2016-01/msg00523.html (6,912 bytes)

155. Topband: XW4ZW (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 19 Jan 2016 18:55:15 +0000
My friend Rich K7ZV just corrected me on Kens call. I been up at 3 a.m. for 3 days. His call is XW4ZW not XZ4. Sorry guys for the typo. Back to sleep. Lee K7TJR OR _________________ Topband Reflector
/archives//html/Topband/2016-01/msg00524.html (6,239 bytes)

156. Re: Topband: VP8STI from Oregon (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Thu, 21 Jan 2016 18:23:40 +0000
Tree and all the folks, It was 0430Z when I knew for sure I was hearing the VP8 station. The first thing recognizable earlier from the SE direction was the 5NN timed about 1 QSO apart. At about 0445
/archives//html/Topband/2016-01/msg00568.html (8,598 bytes)

157. Topband: VP8STI last night in Oregon (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Fri, 22 Jan 2016 17:44:39 +0000
Tree, the conditions to VP8 were much worse last night to my location. I did not hear them at all last night where I had heard them briefly the night before. In addition, the storm noise to the SE wa
/archives//html/Topband/2016-01/msg00589.html (7,742 bytes)

158. Topband: VP8STI Humor, Design engineer trauma (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sat, 23 Jan 2016 18:56:05 +0000
Well, it was not as if I did not know it was going to happen someday, I had remained pretty cheeky until this time. I had often knew it was sure to come. I have remained pretty self-content that I ha
/archives//html/Topband/2016-01/msg00604.html (9,370 bytes)

159. Re: Topband: VP8STI Humor, Design engineer trauma (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sat, 23 Jan 2016 19:10:07 +0000
Rich uses the Hi-Z 4-8 Pro Lee Exactly what antenna was he using? All we know is that it wasn't the Hi-Z 8A. 73, Mike www.w0btu.com<http://www.w0btu.com> _________________ Topband Reflector Archives
/archives//html/Topband/2016-01/msg00606.html (8,468 bytes)

160. Re: Topband: VP8STI Humor, Design engineer trauma (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sat, 23 Jan 2016 20:28:46 +0000
Hello again Mike, Thanks for the question, I have had as many as 4 of the directional Hi-Z and a new undisclosed design experimental Low impedance element arrays running at one time for comparisons.
/archives//html/Topband/2016-01/msg00613.html (10,943 bytes)

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