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References: [ +from:rodman@buffalo.edu: 39 ]

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21. Topband: Shared Apex Loop Array (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Sun, 09 Feb 2014 12:19:29 -0500
I recently put reviews about the SAL-20 and SAL-30 on eham.net if anyone is interested. Two on air demonstrations of the F/B are on YouTube. Please refer to: http://www.youtube.com/watch?v=tVi5xQIXnX
/archives//html/Topband/2014-02/msg00103.html (7,338 bytes)

22. Re: Topband: Recommended Antennas for 160M/80M Receiving (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Mon, 22 Dec 2014 21:21:26 -0500
Just a few more observations with receive antennas. This past year, I did a lecture at the DX club about low band receive antennas. Basically, I gave points for various characteristics of the antenna
/archives//html/Topband/2014-12/msg00376.html (11,294 bytes)

23. Topband: beverage poles (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Fri, 06 Feb 2015 06:54:31 -0500
I use the following after years of failure and this has been very good for me. GALVANIZED electrical conduit. About 2.5cm diameter. Cut in 1.25m length. Pound in ground. Use Gray PVC conduit 3m lengt
/archives//html/Topband/2015-02/msg00231.html (7,089 bytes)

24. Re: Topband: Brave New World (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Thu, 26 Feb 2015 07:05:31 -0500
I receive the list archived and this makes replying to individual posts difficult. It seems to me W0BTU summed it up succinctly. There are time delays and depending on the setup, it it varies from no
/archives//html/Topband/2015-02/msg00651.html (10,317 bytes)

25. Re: Topband: Current Distribution on Buried Radials Used With Vertical Monopoles (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Tue, 10 Mar 2015 08:18:45 -0400
Heading back to the states in a few minutes. Quickly, wondering if one could measure antenna currents in the vertical portion of antenna with a pickup loop at various heights and compare with measuri
/archives//html/Topband/2015-03/msg00045.html (7,078 bytes)

26. Re: Topband: DSP and Latency (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Thu, 19 Mar 2015 06:41:38 -0400
Everything takes time. I have a great example of audio latency. Kitchen has television with direct cable input and family room has digital cable box with HDML to large screen LED set. When watching e
/archives//html/Topband/2015-03/msg00181.html (7,816 bytes)

27. Topband: Tower painting (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Tue, 19 Jul 2016 16:05:09 -0400
I have another perspective on this. For those of you that are pilots, my QTH is on the ring of Class C airspace. Accordingly, many airplanes fly under the "shelf" so they do not have to talk to ATC,
/archives//html/Topband/2016-07/msg00041.html (7,234 bytes)

28. Topband: Ladder line + tuner (score: 1)
Author: D Rodman MD <rodman@buffalo.edu>
Date: Sun, 20 Nov 2016 20:00:31 -0500
I designed a loop for 100 ohm impedance and fed with coax and 1/4 wave transformer. It has worked well for years. I got the bright idea to replace the coaxial feed with 35' of 450 ohm ladder line and
/archives//html/Topband/2016-11/msg00141.html (7,964 bytes)

29. Topband: Rain noise (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Mon, 9 Jul 2018 10:19:26 +0000
First, I want to say this topic is not necessarily topband related, so if anyone wishes to comment about my question, please do so privately so as to cut down on band width. Thank you. Very smart peo
/archives//html/Topband/2018-07/msg00042.html (6,667 bytes)

30. Topband: Common Mode (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Tue, 23 Oct 2018 10:41:11 +0000
I purchased some 7mm dia snap on cores for RG6 receive antenna coax. I was wondering if anyone had any experience or suggestion as to how many one would place on each lead. The feed lines are about 5
/archives//html/Topband/2018-10/msg00190.html (6,673 bytes)

31. Topband: Phasing receive antennas (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Mon, 21 Jan 2019 01:05:25 +0000
I have done this with twin SAL-30 antennas. Spaced about 120' apart. Difficult to say A/B how much audible improvement is present. I can say signals are stronger by about 3dB and the improvement on F
/archives//html/Topband/2019-01/msg00056.html (8,242 bytes)

32. Topband: Broadband DHDL (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Sat, 27 Jul 2019 17:44:46 +0000
My QTH is awkward for putting additional beverages BUT I am intrigued by the DHDL if it can be phased broadside (I have enough room for that), per the reference from IV3PRK: http://www.iv3prk.it/user
/archives//html/Topband/2019-07/msg00106.html (6,993 bytes)

33. Topband: Which RX antenna is better? (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Thu, 1 Aug 2019 16:11:28 +0000
This is possibly a more complicated subject than just performance. I gave a lecture on this topic, comparing a Hi-Z circle 8, SAL-20, SAL-30, beverage (unidirectional and bidirectional and BOG) and t
/archives//html/Topband/2019-08/msg00017.html (8,842 bytes)

34. Re: Topband: Which RX antenna is better? (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Fri, 2 Aug 2019 02:15:53 +0000
Reading all these replies makes me think that the intent of my post might have been somewhat misinterpreted. My post was not intended to be a scientific analysis of only RDF or performance in rating
/archives//html/Topband/2019-08/msg00062.html (8,551 bytes)

35. Topband: Drone (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Sat, 31 Aug 2019 22:34:57 +0000
https://dronefishing.com/ I have used the bait release on this website to great success in order to drop lines right where I want them vertically. You can do things with a drone bait release that you
/archives//html/Topband/2019-08/msg00302.html (7,418 bytes)

36. Topband: Computer noise (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Tue, 26 Nov 2019 11:41:21 +0000
A few ideas might be helpful here. I was at the station over the weekend and found a significant amount of noise coming from one of two computers in the station. Significant noise S5 at 1820. One com
/archives//html/Topband/2019-11/msg00157.html (7,201 bytes)

37. Topband: 300 ohm (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Sat, 29 Feb 2020 12:37:50 +0000
Joe, I have had some trial with this bidirectional setup many years ago. Although having a NE and SW listening antenna is quite desirable for stations in the NE USA, I have experienced repetitive mec
/archives//html/Topband/2020-02/msg00270.html (7,857 bytes)

38. Re: Topband: Low Dipoles (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Sat, 12 Dec 2020 18:25:03 +0000
Growing up, Jim Lawson W2PV (SK) was my local antenna mentor. He addressed 80m dipoles for DX in a conversation with me one day with the following statement, paraphrasing Jim, "If you can't put up a
/archives//html/Topband/2020-12/msg00148.html (8,153 bytes)

39. Topband: Portable transmit antenna suggestions? (score: 1)
Author: "Rodman, David" <rodman@buffalo.edu>
Date: Wed, 10 Mar 2021 11:37:30 +0000
My group is planning a Caribbean trip next year for one of the CW contests. If anyone has some ideas on design or deployment of temporary antennas for DX (160m or any low band actually), it would be
/archives//html/Topband/2021-03/msg00072.html (6,826 bytes)

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