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Total 205 documents matching your query.

101. Re: Topband: Beverage antenna static discharge (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Mon, 22 Nov 2004 23:05:35 +0000
After losing my beverage transformer to lightning, I rebuilt it and inserted it into the base of a defunct 807, so that it became a plug-in coil. Whenever the beverage is not in use and there is any
/archives//html/Topband/2004-11/msg00224.html (7,127 bytes)

102. Re: Topband: Beverage grounding over rock (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Fri, 03 Dec 2004 22:46:13 +0000
IMHO.... Buried, short radials will work. Multiple grounding rods, spaced apart by their length is good. I seem to have good results with about 10 radials, each 10'- 14' in length, with one ground ro
/archives//html/Topband/2004-12/msg00044.html (8,533 bytes)

103. Re: Topband: Short Receive Antennas (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sun, 12 Dec 2004 19:49:17 +0000
You might want to look at an article in QST by K6STI, who experimented/made a "noise-cancelling" antenna. It was a wire antenna, 25 or more feet on a side, with open wire feed lines from two opposing
/archives//html/Topband/2004-12/msg00171.html (8,121 bytes)

104. Re: Topband: New Antenna (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Mon, 27 Dec 2004 20:40:15 +0000
This may run counter to other suggestions you will receive, but here goes. Use the flag pole to support the vertical leg of an inverted L, and the tower to support the far end. This will give the inv
/archives//html/Topband/2004-12/msg00324.html (8,697 bytes)

105. Re: Topband: Re: Increasing bandwidth 160m L (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Fri, 31 Dec 2004 19:07:41 +0000
Don't forget that sometimes increased bandwidth indicates losses within the system. For example, a vertical with an inadequate ground system may exhibit a large bandwidth, but as you install more rad
/archives//html/Topband/2004-12/msg00362.html (11,554 bytes)

106. Re: Topband: Vertical Lightning Protection (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 06 Jan 2005 00:07:05 +0000
It's not static build-up that causes the damage from a lightning surge. It is the electromagnetic pulse radiated directly from the lightning discharge. We once had a near hit, and it magnetised my c
/archives//html/Topband/2005-01/msg00067.html (8,550 bytes)

107. Topband: Condx last night (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Fri, 04 Feb 2005 23:55:32 +0000
Just happened to tune across the band last night approx 0400 GMT. A G3 was coming into middle TN on approx 1830 cw at 579-589, about as strong as most domestic cw signals on the band at the time. Unf
/archives//html/Topband/2005-02/msg00068.html (7,000 bytes)

108. Re: Topband: More not dead yet (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sun, 03 Apr 2005 00:56:43 +0000
I heard a couple of Italians last night on approx 1830 at least 579 - right in there with domestic signals. Also noticed the broadcast stations on the top end of 75 were unusually loud. That part of
/archives//html/Topband/2005-04/msg00012.html (7,441 bytes)

109. Re: Topband: Long Delayed Echoes (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sun, 10 Apr 2005 17:43:45 +0000
I have seen demonstrations at hamfests of equipment than can record a portion of the band on VHS tape and play it back so that the recorded signals throughout the segment can actually be tuned in no
/archives//html/Topband/2005-04/msg00105.html (9,165 bytes)

110. Re: Topband: Broadband vertical (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sun, 10 Apr 2005 18:17:29 +0000
I may have already described my vertical on this board, but here it is again. I use a base-insulated Rohn 25G tower, 127' tall, with 120 quarter-wave radials buried just beneath the sod. At the 119'
/archives//html/Topband/2005-04/msg00106.html (8,989 bytes)

111. Re: Topband: Effect of trees touching inverted L (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Mon, 12 Sep 2005 23:33:03 +0000
If it's only a 1" limb, why not simply trim off the branch. At that height, cutting off a 1" dia branch is unlikely to damage the health or appearance of the tree. At high power, I have heard of ante
/archives//html/Topband/2005-09/msg00024.html (7,468 bytes)

112. Re: Topband: 160 dipole on 80 & 40 (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Wed, 14 Sep 2005 00:31:35 +0000
I never had any problem with that configuration, although my basic antenna was 1/2 wl on 80, not 160. I used about 60 ft of feedline, and the antenna worked well on 80, 40 and 20. What I liked about
/archives//html/Topband/2005-09/msg00028.html (10,032 bytes)

113. Re: Topband: PreAmp Recommendations (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sat, 22 Oct 2005 02:28:30 +0000
My experience with preamps has been that they amplify the background noise just about as much as the signal. Unless your receiver lacks front-end gain, they are pretty much useless. The exception mig
/archives//html/Topband/2005-10/msg00196.html (7,456 bytes)

114. Re: Topband: beverage / proximity to wire fence (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Tue, 01 Nov 2005 20:12:58 +0000
If the fence belongs to you, why not break up the wire every 75 feet or so with strain insulators? Don k4kyv _______________________________________________ Topband mailing list Topband@contesting.c
/archives//html/Topband/2005-11/msg00010.html (7,702 bytes)

115. Re: Topband: 1829.25 Carrier (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Tue, 01 Nov 2005 20:37:32 +0000
That reminds me of one of the most bizarre cases of interference and Murphy's law I can remember. Back in the mid 60's I had a homebrew rig on 160-80-40. It used a single 812A in the final, driven b
/archives//html/Topband/2005-11/msg00011.html (9,563 bytes)

116. Topband: Radiolocation back? (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 03 Nov 2005 02:18:56 +0000
Last night I noticed a strong carrier on 1948 kHz. It is modulated with a rough sounding tone, approx 50~. It stayed on for hours. Noticed it again tonight. This is near the spot where the last audib
/archives//html/Topband/2005-11/msg00029.html (7,534 bytes)

117. Topband: Radiolocation beacon has QSY'ed (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Wed, 09 Nov 2005 00:31:21 +0000
The strong radiolocation beacon that suddenly popped up a few days ago on 1948 kHz has moved to 1952.1. It has been reported with a consistently strong signal throughout eastern N America from New En
/archives//html/Topband/2005-11/msg00059.html (8,633 bytes)

118. Re: Topband: Genius Loci (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Sun, 13 Nov 2005 17:23:10 +0000
That's EXACTLY the issue I have with the new "foundation class" entry level licence in VK and in the UK, that forbids the use of anything but commercially-built equipment. I believe there is a begin
/archives//html/Topband/2005-11/msg00122.html (7,656 bytes)

119. Topband: 160m historical perspective (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Wed, 28 Dec 2005 09:07:47 +0000
I was just thinking today as this year draws to a close... the top half of 160m was restored to amateurs from LORAN in 1985. That's 20+ years ago. 160m has been a full-fledged amateur band now for ov
/archives//html/Topband/2005-12/msg00349.html (8,214 bytes)

120. Re: Topband: Building a practical vertical from Al tubing (score: 1)
Author: "Donald Chester" <k4kyv@hotmail.com>
Date: Thu, 05 Jan 2006 20:11:44 +0000
I prefer metallic guys. If breaking them up with "egg" insulators is no problem, I would recommend "high tensile" agricultural fencing. In our area it is available an any farmer's supply, at low cost
/archives//html/Topband/2006-01/msg00078.html (9,499 bytes)

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