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Total 53 documents matching your query.

21. Topband: Air Wound Coil (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 30 Aug 2018 14:54:45 -0700
<Hi All I'm looking for an Air wondering coil like in this link, http://www.mfjenterprises.com/Product.php?productid=404-0669 I've had one on order from MFJ via a UK company for 4 months now and no s
/archives//html/Topband/2018-08/msg00168.html (8,432 bytes)

22. Re: Topband: Air Wound Coil (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 31 Aug 2018 06:09:32 -0700
--Original Message-- From: Richard (Rick) Karlquist Sent: Thursday, August 30, 2018 5:44 PM To: Guy Olinger K2AV ; Jim Thomson Cc: TopBand List Subject: Re: Topband: Air Wound Coil You can also get t
/archives//html/Topband/2018-08/msg00176.html (10,909 bytes)

23. Re: Topband: Air Wound Coil (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 31 Aug 2018 10:33:40 -0700
--Original Message-- From: Richard (Rick) Karlquist Sent: Friday, August 31, 2018 7:13 AM To: Jim Thomson ; Guy Olinger K2AV Cc: TopBand List Subject: Re: Topband: Air Wound Coil <I am sure that flat
/archives//html/Topband/2018-08/msg00179.html (9,500 bytes)

24. Re: Topband: RE topband Leaving (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 5 Sep 2018 10:01:51 -0700
<I had to go rummage around my Trash folder to find the original post that <started this from the FT8 arguments in addition to the "millennials causing <the WWV shutdown" argument, it appears that th
/archives//html/Topband/2018-09/msg00056.html (10,533 bytes)

25. Re: Topband: Radial wire (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sat, 8 Sep 2018 08:09:29 -0700
<Oh man, any time this topic comes up anywhere the guys come out with all kinds of suggestions for wire that won't last like galvanized steel and electric fence wire. Nix nix nix...if you want a perm
/archives//html/Topband/2018-09/msg00081.html (9,013 bytes)

26. Topband: alternative to shunt fed tower (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 17 Sep 2018 10:34:23 -0700
.25 wave sloper..or loaded .25 wave sloper. Its basicly an upside down GP, with an elevated feedpoint. Then all thats required is a single 130-140 foot long wire. That plus coax to the elevated feedp
/archives//html/Topband/2018-09/msg00133.html (7,285 bytes)

27. Topband: ARRL DXCC - 160 Meters (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 21 Nov 2018 08:57:24 -0800
<9. Station Location and Boundary: <b) All transmitters and receivers comprising a station used for a specific <contact must be located within a 500-meter diameter circle. over nearly 20 acres, and w
/archives//html/Topband/2018-11/msg00209.html (8,755 bytes)

28. Topband: Detuning TX ant + QSK (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 28 Nov 2018 02:26:21 -0800
For you folks that have to de-tune your TX ant, so your dedicated RX ant works correctly, if you also operate qsk, how do you do it ? Are you using a sped up vac relay to de-tune the TX ant ? I dont
/archives//html/Topband/2018-11/msg00290.html (6,438 bytes)

29. Re: Topband: Detuning TX ant + QSK (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 28 Nov 2018 07:22:25 -0800
resistor, with a value of aprx 2-3 times that of the vac relay coil resistance, in series with the rvs connected back emf diode. Doesnt matter which leg of the diode, that the resistor is inserted i
/archives//html/Topband/2018-11/msg00297.html (10,038 bytes)

30. Topband: Rather use N-type (was Re: The answer to PL-259 (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sat, 8 Dec 2018 08:49:47 -0800
<On the other hand, the much bulkier 7-16 DIN connectors offer <similar high performance and they're widely available at much <more affordable prices. For example, do this Google search <73 <Frank <W
/archives//html/Topband/2018-12/msg00110.html (10,309 bytes)

31. Re: Topband: Rather use N-type (was Re: The answer to PL-259 (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sun, 9 Dec 2018 10:28:33 -0800
<I've been shopping for them. You need a minimum of 1 1/4" depth for <the PL-259. That rules out all the cheap ones. For ~$300 you can <get an American Beauty with 1 1/2" depth. <Does anyone have a b
/archives//html/Topband/2018-12/msg00121.html (11,252 bytes)

32. Re: Topband: Rather use N-type (was Re: The answer to PL-259 (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sun, 9 Dec 2018 10:42:56 -0800
<A BNC connector has a ?.050 pin and when mated properly an N connector has a <.120 center pin. <John KK9A of a type N is bigger, to handle the larger center conductor of 213 U etc. flows on the outs
/archives//html/Topband/2018-12/msg00122.html (9,687 bytes)

33. Re: Topband: CQ 160 (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 30 Jan 2019 09:16:34 -0800
<I struggled to work a W8 on Topband this weekend (who I'd worked quite a few <times before) and <he could just NOT get my suffix. VE9AT, VE9A? , VE9TT, VE9?A, VE9MT, VE9MMT, <VE9AAT, etc. <Mike VE9
/archives//html/Topband/2019-01/msg00175.html (7,078 bytes)

34. Topband: spark gap construction ideas for 160m tower (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 7 Oct 2019 14:21:12 -0700
<There are a number of ways of making a ball gap. but more important <is arriving at the correct spacing for the gap. <The way rain is handled is usually by positioning the balls one above <the other
/archives//html/Topband/2019-10/msg00025.html (10,093 bytes)

35. Topband: Measuring Common Mode Chokes (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Thu, 19 Dec 2019 22:19:40 -0800
<In the past, I have simply used my N2PK VNA to measure impedance of the choke by connecting the shield of the coax to the VNA ports. <Recently I've been discussing common mode chokes with others who
/archives//html/Topband/2019-12/msg00204.html (8,269 bytes)

36. Topband: Coil 3.77 software (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Sat, 21 Dec 2019 14:32:34 -0800
Coil 3.77 is now available.... replaces coil 3.72 http://ham-radio.com/k6sti/coil.zip Jim VE7RF _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
/archives//html/Topband/2019-12/msg00211.html (6,288 bytes)

37. Topband: FT-8 Contest would be great for Topband (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 10 Jan 2020 17:06:38 -0800
<I know the purists will flame me for this but look at the <frequency conservation this would present and look at the activity <statistics for only the past couple of hours, <AIf the contest was desi
/archives//html/Topband/2020-01/msg00139.html (9,007 bytes)

38. Topband: Topband resource (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Wed, 15 Jan 2020 21:05:27 -0800
<W8JI's experience with a horizontal dipole at 300 ft is often quoted as proof that only vertical antennas are useful for 160m DX. This is not my experience with a dipole with the centre at 320 ft an
/archives//html/Topband/2020-01/msg00251.html (10,220 bytes)

39. Topband: Dacron & varmits (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Tue, 18 Feb 2020 10:58:33 -0800
<If it is really dacron then http://synthetictextilesinc.com/supportham.html <And available at several ham radio suppliers. KF7P at https://www.kf7p.com/KF7P/Welcome.html is one helluva lot stronger
/archives//html/Topband/2020-02/msg00166.html (8,027 bytes)

40. Re: Topband: Hi Z amplifiers for 160m (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 13 Mar 2020 09:42:23 -0700
<Didn't review your math, but the more important question is, "how old is <your noise data?" In my experience trying to work EU on Topband now as <compared to c.a. 2007-8 is vastly more difficult tha
/archives//html/Topband/2020-03/msg00148.html (8,652 bytes)

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