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Total 263 documents matching your query.

201. Topband: test please ignore (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Fri, 3 Aug 2018 03:37:13 +0000
Test email please ignore. Thanks, Lee K7TJR OR _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2018-08/msg00041.html (6,282 bytes)

202. Re: Topband: making a bev seem longer (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Mon, 6 Aug 2018 21:27:41 +0000
Hi JC, Not all vertical arrays are mono band. A well built 4-square on a 60 foot per side can do a stellar job on 160, 80, and 40 meters while extending well down into the broadcast band. The 3 eleme
/archives//html/Topband/2018-08/msg00067.html (9,577 bytes)

203. Re: Topband: 160m Condx (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Mon, 12 Nov 2018 19:55:44 +0000
Just as a reminder to all that these BCI problems can also occur at 2nd and 3rd order IMD mixing. Example 3rd order, one station on 1220 where 2X equals 2440 and a second station at 620 subtracted pu
/archives//html/Topband/2018-11/msg00057.html (13,818 bytes)

204. Re: Topband: 40m array as RX antenna (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Thu, 15 Nov 2018 22:40:57 +0000
Hello JC, There is nothing to disagree about JC, My 20 to 24 foot elements when fed into a Hi-Z amp produce a signal that is around 20 dB less than a good TX vertical. Your Waller flags produce a sig
/archives//html/Topband/2018-11/msg00104.html (12,227 bytes)

205. Topband: RCS8V is the correct model (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sat, 24 Nov 2018 02:04:34 +0000
Hi Al and the group I was looking for an on to off isolation spec with the RCS8V coaxial switch but unable to find one. I have seen where two different receiving antennas will interact with each othe
/archives//html/Topband/2018-11/msg00241.html (7,656 bytes)

206. Re: Topband: Info on modding 4 el HI-Z to 3 el HI-Z wanted (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Fri, 30 Nov 2018 17:56:23 +0000
Hello Kevin, You would need to get a shack switch for the 3 element array and a phase controller for the three element. All the rest would retrofit just fine except you would have to contact me about
/archives//html/Topband/2018-11/msg00333.html (11,167 bytes)

207. Re: Topband: W7LR (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sat, 1 Dec 2018 19:31:32 +0000
Tree, Would you please pass along Bob W7LR's new address. Or a phone number if you have it. Bob and I corresponded regularly as he was one of the very first that I designed a receiving array for quit
/archives//html/Topband/2018-12/msg00006.html (10,036 bytes)

208. Re: Topband: Stew Perry Contest (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 1 Jan 2019 02:59:16 +0000
If I was KH6LC I would be rather offended by that comment Bruce. What does it Really mean? Perhaps not what the words really say? KH6LC has more hard work in his station than many. Lee K7TJR OR Somet
/archives//html/Topband/2018-12/msg00355.html (10,393 bytes)

209. Topband: V84SAA 2019 (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sun, 17 Feb 2019 17:29:58 +0000
Every once in a while we on the West coast of the US see a little advantage for our DXing efforts over the East coast operators. V84SAA with their awesome expertise has shown to be one of those times
/archives//html/Topband/2019-02/msg00162.html (7,476 bytes)

210. Topband: 4sq vs SAL 30 Mkii in a forest (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Mon, 18 Feb 2019 23:55:57 +0000
Since the inception of the Hi-Z antenna products we have recommended that the elements be distant from foliage by at least 5 feet clearance. We have also recommended that tall trees be 10 feet away f
/archives//html/Topband/2019-02/msg00185.html (7,853 bytes)

211. Re: Topband: 4sq vs SAL 30 Mkii in a forest (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 19 Feb 2019 04:15:05 +0000
Joe and all, Looking at the YCCC plots show all back lobes on 160 meters to be right at 20 dB down. The Hi-Z 4-square as shipped has only 2 side lobes and both are at 20 dB down with a notch directly
/archives//html/Topband/2019-02/msg00188.html (11,069 bytes)

212. Re: Topband: Thanks (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sun, 24 Feb 2019 21:34:48 +0000
Rich K7ZV was reporting he was hearing Dave very light from his hilltop place in southern OR. He was unable to make the Q. I have a pretty high noise floor at the moment and did not hear anything exc
/archives//html/Topband/2019-02/msg00238.html (8,151 bytes)

213. Re: Topband: RX and TX remote direction switch (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Wed, 27 Feb 2019 04:29:14 +0000
I used to use rotary switches also but once I developed the coax switches for Hi-Z that have 80 dB of cross port isolation. I would never go back to using a switch or single relay with a typical cros
/archives//html/Topband/2019-02/msg00249.html (8,170 bytes)

214. Re: Topband: Counterpoise (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 16 Apr 2019 17:41:21 +0000
Hey Bob, Dont forget that you could interfere with your Hi-Z receiving array by getting more radials close to it. Lee K7TJR OR Fellow Topband Aficionados - Question about wire layout in a elevated co
/archives//html/Topband/2019-04/msg00066.html (7,654 bytes)

215. Re: Topband: Hi Z 4 el. RX array LNA protection (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Sat, 4 May 2019 16:25:39 +0000
Hello Mark, Yes I do read most postings on this reflector. It is a great group. I think there is likely over 1000 of the Hi-Z amps around the world. I have no direct knowledge of any amp damaged from
/archives//html/Topband/2019-05/msg00008.html (9,358 bytes)

216. Topband: 160 meter noise (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 23 Jul 2019 16:37:31 +0000
I have a Ray Jeff 680/ADF marine radio direction finder I have used for noise location for a long time and it is in need of some maintenance. I have looked for a schematic for years without success.
/archives//html/Topband/2019-07/msg00070.html (6,491 bytes)

217. Re: Topband: RX antennas comparison chart (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 30 Jul 2019 21:05:42 +0000
I have another comparison chart here on the Hi-Z Antennas website. It has a little more information. https://www.hizantennas.com/receiving_antennacomparison_char.htm Lee K7TJR Hi-Z Antennas Thanks to
/archives//html/Topband/2019-07/msg00133.html (8,229 bytes)

218. Re: Topband: Which RX antenna is better? (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Thu, 1 Aug 2019 18:32:42 +0000
Agreed Chuck, I maybe read David's post differently than he meant it to read also. This progression from TX antennas to loops to Beverages to 8 circle arrays is exactly how Hi-Z began. It is because
/archives//html/Topband/2019-08/msg00036.html (14,075 bytes)

219. Topband: YCCC 9 circle preamp failure test (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Tue, 24 Sep 2019 19:08:46 +0000
Hi Guys, Assuming your verticals have a very good insulator there is NOTHING to stop that input capacitor from charging to very high like kilovolt static voltage levels. What I dont understand is why
/archives//html/Topband/2019-09/msg00103.html (9,609 bytes)

220. Re: Topband: YCCC 9 circle preamp failure test (score: 1)
Author: Lee STRAHAN <k7tjr@msn.com>
Date: Wed, 25 Sep 2019 00:06:59 +0000
Hello again Steve, It seems to me that one could determine what was going on by making two tests. One is to simply bypass the capacitor with a wire to see if its rectifying. The other is to monitor t
/archives//html/Topband/2019-09/msg00107.html (13,310 bytes)

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