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Total 174 documents matching your query.

1. Topband: Re: Yaesu FT1000mp Mark V Key Clicks (score: 1)
Author: w9ac@arrl.net (Paul Christensen)
Date: Tue, 10 Dec 2002 07:23:59 -0500
Most of the Ten Tecs fit this criteria, but I'm not sure you would call anything but the Omni Five and Six as truly "competition grade." The Omni V and the original VI (pre VI Plus) had extraordinar
/archives//html/Topband/2002-12/msg00147.html (9,694 bytes)

2. Topband: Diversity receiving (score: 1)
Author: w9ac@arrl.net (Paul Christensen)
Date: Tue, 2 Jul 2002 09:41:29 -0400
But is it possible to lock the receivers in the FT-1000 without having to constantly hold the tracking button? When I owned the FT-1000MP, I don't believe continuous frequency tracking of both recei
/archives//html/Topband/2002-07/msg00009.html (7,443 bytes)

3. Re: Topband: Transceiver Key Clicks (score: 1)
Author: "Paul Christensen, Esq." <w9ac@arrl.net>
Date: Mon, 5 Jan 2004 21:47:03 -0500
Omni The stock Omni VI+ has a very sharp and discontinuous leading edge. The trailing edge is fine. Interestingly, the Omni V had much better waveform shaping but in the analysis I conducted back in
/archives//html/Topband/2004-01/msg00050.html (10,081 bytes)

4. Re: Topband: Transceiver Key Clicks (score: 1)
Author: "Paul Christensen, Esq." <w9ac@arrl.net>
Date: Tue, 6 Jan 2004 08:21:51 -0500
the Quite true Tom. When I indicated that the design can be a challenge, I should have said that a "re-design" can be a challenge to an existing radio. power spike anomalies is actually quite easy t
/archives//html/Topband/2004-01/msg00059.html (8,381 bytes)

5. Re: Topband: Keying waveform (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 27 Jan 2004 07:25:11 -0500
My 1998 edition shows a much different photo. I am referring to section 17.5, figure 17.52. The photo depicts an abrupt rise and a very sharp discontinuity on the trailing edge. Likewise, the photo s
/archives//html/Topband/2004-01/msg00256.html (8,358 bytes)

6. Re: Topband: Keying waveform (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 27 Jan 2004 08:49:40 -0500
be As long as the CW signal is reasonably centered within the xtal filter passband, this is a good suggestion. However, if the signal falls off-center and is placed on the sharp knee of the filter,
/archives//html/Topband/2004-01/msg00260.html (7,837 bytes)

7. Re: Topband: Tripplite power outlet OPTION (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 6 Dec 2006 07:15:23 -0500
Tom, One thing to keep in mind when establishing secondary CATV grounding is that the cable is, or should be, bonded to the AC common Xo ground at the cable entrance point. Typically, CATV companies
/archives//html/Topband/2006-12/msg00079.html (7,731 bytes)

8. Re: Topband: Source of #31 Material Toroids? (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 14 Dec 2006 07:18:31 -0500
Jeff, Fair-Rite sells #31 material on toroid cores, but you'll find them in the EMI section of their catalog on page 71. http://www.fair-rite.com/newfair/pdf/15th_Edition_Fair-Rite_Catalog.pdf#page=
/archives//html/Topband/2006-12/msg00155.html (7,146 bytes)

9. Re: Topband: Key Clicks (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 28 Jan 2007 16:40:41 -0500
Key clicks coming from the 7800 are almost surely the result of ALC overdrive -- which can produce a hard leading-edge The 7800 incorporates a front panel "Drive" control. Proper setting in CW is to
/archives//html/Topband/2007-01/msg00435.html (8,687 bytes)

10. Re: Topband: Key Clicks (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 28 Jan 2007 20:14:25 -0500
K6SE: Maybe this will change your mind...Here are the facts: I just measured the CW rise/fall time on my IC-7800 at the point where the ALC region is just slightly active The results: Icom Setting Me
/archives//html/Topband/2007-01/msg00443.html (10,133 bytes)

11. Re: Topband: Key Clicks (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 29 Jan 2007 08:04:12 -0500
It's unfortunate that there is not a better way of automatically managing ALC in most radios. Although I like the ability to manually adjust drive level on the IC-7800, I think many operators just i
/archives//html/Topband/2007-01/msg00448.html (9,691 bytes)

12. Re: Topband: Powering a 26.5 V relay from 12 V (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 30 Mar 2007 17:48:55 -0400
This may be what you're looking for: http://www.k6xx.com/radio/fastrely.pdf Paul, W9AC _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contes
/archives//html/Topband/2007-03/msg00176.html (7,049 bytes)

13. Topband: 160M 4-Square Location (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 19 Oct 2007 16:44:27 -0400
I am considering a location along the Atlantic Ocean for placement of 160M and 40M 4-square arrays. Operation would be by remote control over the Internet. I have spent the last two years perfecting
/archives//html/Topband/2007-10/msg00093.html (8,523 bytes)

14. Re: Topband: Balun for a balanced tuner ? (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 9 Apr 2008 08:48:09 -0400
That depends on the 160M choking reactance and will be a function of the type of ferrite material and the number of beads used. On 160M, I would be more comfortable using a toroid design like that d
/archives//html/Topband/2008-04/msg00014.html (8,911 bytes)

15. Re: Topband: Balun for a balanced tuner ? (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 9 Apr 2008 09:01:35 -0400
to look? Martin 73, DM4iM" The XMatch is described in U.S. Patent #4,763,087, including circuit diagrams. Examine the prior art, then look at the claims and decide for yourself what the patent exami
/archives//html/Topband/2008-04/msg00015.html (7,349 bytes)

16. Re: [RFI] Computer RFI on 160 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 29 Oct 2008 16:31:36 -0400
Bill, I routinely change out or replace chassis IEC connectors with the CORCOM 6EF1. Cost of the EMI filter is generally a function of the number of sections. One item to note is that many manufactu
/archives//html/Topband/2008-10/msg00160.html (8,331 bytes)

17. Re: Topband: Coax (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 20 Jan 2009 10:40:56 -0500
Equally good for Rx is the flooded, direct-bury RG-6 QS. I'm a refugee from the CATV industry and have developed an appreciation for Snap-'N-Seal "F" connectors. DXE supplies high quality SNS hardwa
/archives//html/Topband/2009-01/msg00202.html (7,312 bytes)

18. Re: Topband: Deep earth rod vs radials (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 17 Mar 2009 12:42:12 -0400
One question I've asked of others in the past without a conclusive answer: At what distance is the far-field ground conductivity no longer relevant with a vertical radiator? IOW, there's some distan
/archives//html/Topband/2009-03/msg00046.html (9,823 bytes)

19. Re: Topband: "T"-Top Vertical Antennas (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 24 Jul 2009 11:59:22 -0400
For the historians on the list, one of the first amateur radio transmissions heard across the Atlantic Ocean occurred during the sponsored ARRL transatlantic tests in 1921-1922. Station 1BCG in Green
/archives//html/Topband/2009-07/msg00115.html (8,650 bytes)

20. Re: Topband: "T"-Top Vertical Antennas (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sat, 25 Jul 2009 16:32:27 -0400
likely they didn't realize it was their "feeder" doing all the work and the flattop radiation was being cancelled out ! By 1921, they knew the importance of the flat-top as a non-radiating loading d
/archives//html/Topband/2009-07/msg00122.html (9,201 bytes)

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