Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Fri, 28 May 2010 13:12:04 -0700 (PDT)
The formula you provide above calculates to a total length of your inverted-L of 50 meters (164 feet), if wave length=160. My 150 foot inverted-L (vertical portion is 50 feet) has the following matc
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Tue, 1 Jun 2010 17:42:17 -0700 (PDT)
I know there's diehards on Topband in the northern hemisphere that work CW DX on 160 all year long. I would like to know what they do to hear the weak ones in the southern hemisphere, in spite of the
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sat, 5 Jun 2010 14:23:35 -0700 (PDT)
[snip] [snip] Thank you Yuri -- and everyone else -- for the replies. Much appreciated. Yuri's comment above especially got my attention. I use a heavily modified Drake R-4C with all the contest mod
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Mon, 5 Jul 2010 21:44:49 -0700 (PDT)
At my QTH in NJ I have the capability to mount a 500-foot, two-line, reversible Beverage running NE-SW. However, I am hesitant to undertake this project because the antenna would be entirely in the w
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sat, 10 Jul 2010 19:15:10 -0700 (PDT)
You said it, Charlie. It has been said that "Beverages just want to work". How true. Almost any Beverage will hear better than the vertical transmitting antenna. 73, Mike Waters W0BTU ______________
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Wed, 21 Jul 2010 23:32:40 -0700 (PDT)
Lew, The first thing that comes to mind is putting them all on the same plane, and using an elevated radial system at the bottom of that plane. 73, Mike Waters www.w0btu.com _________________________
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sat, 14 Aug 2010 19:04:25 -0700 (PDT)
Dear Panos, Thank you for this good information. I have added it to my new web site at http://www.w0btu.com/files/antenna/Optimum_no_of_radials_vs_radial_length.html 73, Mike Waters www.w0btu.com ...
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Wed, 25 Aug 2010 22:13:26 -0700 (PDT)
Hello Jim, I'm sure I speak for everyone else in this group (with lots more 160 experience than I do) when I say that we would simply love to give whatever encouragement that we possibly can to any n
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Wed, 1 Sep 2010 00:45:04 -0700 (PDT)
I use Commscope 75 ohm flooded RG-6/U CATV coax. Much cheaper than Belden, and works just great on 160 for both my Beverages and for feeding my inverted-L. You can buy a 1000 foot roll of it off eBay
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Thu, 7 Oct 2010 20:03:51 -0700 (PDT)
Hi Mike, Beverages are not critical. It has been said that they "want to work". I guarantee that you won't notice the difference from raising it 13' for a little ways. I have one that crosses a ravi
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sun, 10 Oct 2010 02:52:16 -0700 (PDT)
Heard another tonight (briefly) to the NE about 4:30 AM local time: GX8E 1826 On the ON4KST Low band chat: 0924 GMT vo1hp 1816.3 LM0 fishing beacon 73, Mike Waters www.w0btu.com -- Original Message -
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Wed, 3 Nov 2010 15:42:35 -0700 (PDT)
Hello Brian, A Beverage requires a poorly conductive ground (poor compared to the wire itself) under it to work right. Is it possible to run the wire parallel to the fence but spaced some distance fr
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sun, 7 Nov 2010 15:01:01 -0800 (PST)
Hello all, I've been anxiously awaiting the release of the 5th edition of Low Band Dxing by John, ON4UN. The ARRL's web site still says "Out-of-Stock. New Edition coming in October!.http://www.arrl.o
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sun, 7 Nov 2010 17:26:01 -0800 (PST)
Hi Mark, N6LF recently found that the optimum radial length depends on how many radials you lay down. Check this out: http://www.w0btu.com/files/antenna/Optimum_no_of_radials_vs_radial_length.html 73
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Mon, 8 Nov 2010 11:34:48 -0800 (PST)
Thanks, John! You did a FANTASTIC job. I just loved the 4th edition! 73, Mike Waters www.w0btu.com ARRL promised me that the book would be available around December 10. 73 John, ON4UN --Original Mess
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Thu, 11 Nov 2010 10:45:14 -0800 (PST)
I should have included this link: http://www.antennasbyn6lf.com GREAT information there. 73, Mike Waters www.w0btu.com ________________________________ ... Hi Mark, __________________________________
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sat, 20 Nov 2010 14:32:58 -0800 (PST)
Yes. Take a look at the Beverage photos linked from www.w0btu.com. Near the bottom are my Beverage transformer boxes. One Beverage has the switching arrangement with a single run of RG-6, but the oth
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sat, 20 Nov 2010 15:20:53 -0800 (PST)
I should have mentioned that those Beverage transformers near the bottom of http://picasaweb.google.com/katie65752/BeverageAntennas# were made from stacked FB-73-801 ferrite beads. I used 24 AWG enam
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Sun, 19 Dec 2010 21:19:18 -0800 (PST)
Hello Topbanders, Has anyone used DSP and/or and SDR to receive extremely weak signals on 160 that are buried in the noise? "As an example of the filtering features, listen to these two audio samples
Author: Mike Waters W0BTU <mrscience65704@yahoo.com>
Date: Fri, 24 Dec 2010 01:16:31 -0800 (PST)
I'm no expert on 160 propagation, but it seems to me that we had the same thing last winter. Isn't it in February that the propagation tends to stop favoring Europe and start favoring VK, ZL, and JA?