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21. Topband: Temporary Beverage? (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Fri, 2 Nov 2007 13:30:27 -0700
Martin: There are a lot of caveats to your question about your Beverage antenna however I have a couple of thoughts. First to compare to your TX vertical I must guess at an approximate 4 Db figure of
/archives//html/Topband/2007-11/msg00002.html (7,516 bytes)

22. Topband: One way propagation (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sun, 11 Nov 2007 07:50:38 -0800
Highly recommended experiment to try Tom. Playing with lasers at UCLRL Livermore circa 1965 when the light bulb went on in my head that said "oh, that's how antennas work" . Having set behind some pr
/archives//html/Topband/2007-11/msg00061.html (7,586 bytes)

23. Topband: RX antenna comparisons (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Mon, 12 Nov 2007 17:14:52 -0800
As a result of so many hits to my Receiving Antenna Comparison web site I have updated most of the information. I have included Eznec file downloads for all the antennas in the chart. Also included n
/archives//html/Topband/2007-11/msg00083.html (6,498 bytes)

24. Topband: K7TJR Antenna (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 4 Dec 2007 09:48:41 -0800
Sorry to hear of your antenna problems K9DX John. The Oregon 100 mph wind storm also took down my 90 foot top loaded vertical. It has been up for 3 years if I remember right in a 70 mph wind zone and
/archives//html/Topband/2007-12/msg00034.html (7,357 bytes)

25. Topband: low angle reception using active antennas (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Wed, 5 Dec 2007 19:23:16 -0800
Yes there is a difference in putting an amplifier in the middle of a shortened Hi-Z element rather than at the end using high impedance buffers. The radiation pattern remains virtually the same. You
/archives//html/Topband/2007-12/msg00064.html (9,738 bytes)

26. Topband: Vertical array (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Wed, 12 Dec 2007 22:01:17 -0800
If you are looking at reducing stateside signals (why?) from the rear of a cardiod antenna such as the 2 element you describe I think you should look at selecting the phasing that will best reduce th
/archives//html/Topband/2007-12/msg00107.html (8,374 bytes)

27. Topband: Vertical array (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 13 Dec 2007 14:30:08 -0800
phase by a small amount my simple mind said: I don't know the angle at which local interference arrives. The only thing I can guestimate is the arrival angle of stateside & DX signals, therefore I c
/archives//html/Topband/2007-12/msg00112.html (10,504 bytes)

28. Topband: Daylight QSO's during the SP (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Mon, 31 Dec 2007 12:16:23 -0800
A few weeks ago I was listening to a JA station during our sunrise. This station was very loud before sunrise. I listened to him until he finally faded away a full 2 hours plus after my sunrise. He r
/archives//html/Topband/2007-12/msg00253.html (8,176 bytes)

29. Topband: Boring Report (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 3 Jan 2008 11:50:49 -0800
First congrats on getting up another element on TX for the Boring arsenal. Perhaps you have, or I could bring over a 2 channel scope and current probes sometime. You could check the phase difference
/archives//html/Topband/2008-01/msg00032.html (7,644 bytes)

30. Topband: Daylight QSO (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sat, 5 Jan 2008 13:29:42 -0800
No free lunch on daylight qsos from the NW this a.m. at 1800Z. I listened in every direction with not a peep. I sent 1.5Kw CQs for about 10 min. on 1823.7 with no response. Will try again for a few d
/archives//html/Topband/2008-01/msg00052.html (7,460 bytes)

31. Topband: Soldering radials etc (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sat, 5 Jan 2008 19:23:37 -0800
Merv, I would consult a local welding supply shop if you can find one. Ask them about low temperature eutectic brazing. You might mention the name SILFOS and see if they can recommend something in st
/archives//html/Topband/2008-01/msg00054.html (7,071 bytes)

32. Topband: Problems with a Home Brew version of the RX 4 Square (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Fri, 11 Jan 2008 14:46:26 -0800
to make them all as identical as possible. One of the common errors when building these amps is for each amplifiers transformer to not be phased exactly the same for each amp. It is easy to accident
/archives//html/Topband/2008-01/msg00084.html (9,582 bytes)

33. Topband: 160M Daylight QSO's - Conclusion (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Sun, 13 Jan 2008 20:02:10 -0800
I listened for several days in a row last week at the appointed time and on every antenna I have for a daylight Qso. Not a peep. I think I am outside the limits for you East coast guys. One fella and
/archives//html/Topband/2008-01/msg00103.html (7,378 bytes)

34. Topband: 160M Daylight QSO's - Conclusion (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Mon, 14 Jan 2008 11:21:25 -0800
Exciting, I heard my first daylight top-band signal with neither station in the darkness during these tests. W8JI and I were trying on schedule and I can report no results from 2130 miles away. I did
/archives//html/Topband/2008-01/msg00107.html (7,339 bytes)

35. Topband: Daylight 160 Sked (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 15 Jan 2008 10:58:21 -0800
Well that was a very interesting daylight test this a.m. . My Beverages were very noisy today as was the TX vertical. Only station heard and worked easily was K8IA at about 920 miles. Very large and
/archives//html/Topband/2008-01/msg00120.html (7,429 bytes)

36. Topband: Daylight 160 Sked (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 15 Jan 2008 22:38:55 -0800
I listened to 2.5 Mhz WWV today during broad daylight in an effort to hear WWVH. I could not find enough notch in any of my antennas to effectively null out the Boulder signal. Boulder is incredibly
/archives//html/Topband/2008-01/msg00125.html (7,496 bytes)

37. Topband: Rx power splitter (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 7 Feb 2008 09:19:30 -0800
Pete: I suggest you use a Magic Tee combiner backwards. To understand it you can Google magic tee and look at the pages by Mike Ellis. W8JI has some stuff on them too. I use 7 of them in my one array
/archives//html/Topband/2008-02/msg00042.html (7,540 bytes)

38. Topband: Radials (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 7 Feb 2008 09:46:19 -0800
Dave: I put up a 40 meter 4-square 2 years ago with 64 radials on each element. I put the radial system in with soldering to a central bus along each side as shown by ON4UN. The system impedances are
/archives//html/Topband/2008-02/msg00044.html (7,351 bytes)

39. Topband: Radials (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Thu, 7 Feb 2008 11:32:50 -0800
Totally agreed on interconnection of radials. The half as long comment was only made to show wire would be wasted in my opinion if they were not bus style interconnected. They would be totally overla
/archives//html/Topband/2008-02/msg00048.html (7,520 bytes)

40. Topband: End Fed Twin Lead Marconi Antenna (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Tue, 4 Mar 2008 18:43:18 -0800
Steve said, Is the UNUN approach better or worse or about the same as the reactive antenna with series capacitor approach? I think the answer to your question depends entirely on the quality of your
/archives//html/Topband/2008-03/msg00015.html (7,980 bytes)

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