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References: [ +from:W4EF@dellroy.com: 313 ]

Total 313 documents matching your query.

41. Topband: ICE Model 135B 1.8 - 4 MHz Preamp (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Wed, 14 Mar 2001 02:49:52 -0800
Does anyone out there have any experience with the ICE Model 135B 1.8 to 4 MHz Preamp? Specifically, I am wondering how the selectivity and dynamic range look. Does anyone know the 3rd order intercep
/archives//html/Topband/2001-03/msg00095.html (6,928 bytes)

42. Topband: C&S Engineering Preamp (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Sat, 17 Mar 2001 09:38:24 -0800
Does anyone out there have any experience with the C&S Engineering Preamp with varactor tuned preselector? Last week I asked about the ICE Model 135B preamp, and I wondering how the C&S unit compares
/archives//html/Topband/2001-03/msg00103.html (6,905 bytes)

43. Topband: topband mobile (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Fri, 23 Feb 2001 15:53:22 -0800
I had a humbling experience with KH6DX/M during the recent CQ 160 CW contest. I was operating from W6UE in Pasadena using 1000 watts to a dipole at 90 feet. KH6DX/M beat me out in a pileup for V73CW.
/archives//html/Topband/2001-02/msg00081.html (7,244 bytes)

44. Topband: MFSK on 160m (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Wed, 3 Jan 2001 03:41:48 -0800
Tom, et al: The url for the MFSK Egroup is as follows: http://www.egroups.com/files/MFSK/ To join the discussion you need to be registered with Egroups.com. If you aren't registered with Egroups.com,
/archives//html/Topband/2001-01/msg00023.html (7,270 bytes)

45. Topband: Where's New England? (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Sun, 3 Dec 2000 15:03:24 -0800
I listened some from my city lot here in Pasadena this weekend. Normally I hear signals as far east as Ohio quite well. I was surprised this year that signals from W8 (K8XXX, K8ND, etc) were way down
/archives//html/Topband/2000-12/msg00018.html (8,281 bytes)

46. Topband: Flag Antenna Feedline Decoupling (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Sun, 10 Dec 2000 14:14:48 -0800
I am getting ready to build a set of flag transformers and had plan to put a string of ferrite beads on the feedline to decouple it from the antenna. Can anyone tell me how many beads I should use to
/archives//html/Topband/2000-12/msg00068.html (7,349 bytes)

47. Topband: Flag Antenna Feedline Decoupling (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Mon, 25 Dec 2000 22:05:06 -0800
The following is a summary of the responses that I received to my query on decoupling feedlines from flag antennas. Thanks to all who replied. 73 de Mike, W4EF............................... -- FAQ o
/archives//html/Topband/2000-12/msg00139.html (9,915 bytes)

48. Topband: Wideband Noise on 160 (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Tue, 26 Dec 2000 12:17:29 -0800
Hi Ford, Sounds like you have established that the noise is not coming from your receiver. The next thing I would do is try to establish whether the noise is generated locally (e.g. within your neigh
/archives//html/Topband/2000-12/msg00141.html (8,557 bytes)

49. Topband: Polarization of Man Made Noise? (score: 1)
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Mon, 30 Oct 2000 21:24:37 -0800
Hi All, I have been observing an interesting phenomenon at our club station. We have a full size 160 meter dipole at 90 feet, which is for the most part horizontal (there is a slight downward tilt in
/archives//html/Topband/2000-10/msg00181.html (9,551 bytes)

50. Re: Topband: rx antenna switch (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Thu, 4 Sep 2003 10:41:16 -0700
The ones I have taken apart are just simple mechanical switches and as such should work fine down to DC. Isolation at VHF and UHF is typically a minimum of 75dB. At 1.8 MHz its probably in excess of
/archives//html/Topband/2003-09/msg00016.html (8,964 bytes)

51. Re: Topband: RE: Karlquist Proposal for reverse beacons (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Sat, 20 Sep 2003 21:04:52 -0700
Not necessarily. You could do a reverse of the NCDXF system whereby the receiver could utilize directional receive antennas with each direction in a preassigned time slot. A series of ten one minute
/archives//html/Topband/2003-09/msg00085.html (9,027 bytes)

52. Re: Topband: Antenna on small lot (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Sat, 27 Sep 2003 07:59:22 -0700
Hal, Try an inverted L (40 ft vertical, 50 ft horizontal). Feed the wire against ground with the appropriate impedance matching network and as many ground radials as you can get down. You will be sup
/archives//html/Topband/2003-09/msg00122.html (7,403 bytes)

53. Re: Topband: 3C0 (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Wed, 1 Oct 2003 21:28:09 -0700
Does anyone know whay the 3C0's guys are shutting down around 0100 UTC every night? I saw a blurb on the OH2AQ cluster saying that it was due to loss of commercial power at that time, but the expedit
/archives//html/Topband/2003-10/msg00011.html (7,930 bytes)

54. Re: Topband: am broadcast station listing? (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Thu, 11 Dec 2003 04:21:23 -0800
Try this link, Jamie http://www.radiostation.com/fccdata/amcall.html 73 de Mike, W4EF.................... find a _______________________________________________ Topband mailing list Topband@contestin
/archives//html/Topband/2003-12/msg00109.html (7,626 bytes)

55. Re: Topband: am broadcast station listing? (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Thu, 11 Dec 2003 14:11:52 -0800
My apologies to all. Seems that the link I provided for searching the AM broadcast station database isn't working. The search window comes up fine, but it doesn't process the search anymore. Don't kn
/archives//html/Topband/2003-12/msg00115.html (9,225 bytes)

56. Re: Topband: Non-inductive resistors (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Thu, 18 Dec 2003 13:28:03 -0800
Joe, Have you tried the ceramic composition resistors that Digi-Key sells. I think they have them in 1 and 2 watt varieties. They are fairly cheap and available in small quantities. Mike, W4EF.......
/archives//html/Topband/2003-12/msg00146.html (7,615 bytes)

57. Re: Topband: Non-inductive resistors. (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Fri, 19 Dec 2003 23:19:47 -0800
Joe, Don't forget the Ohmite OX/OY series ceramic composition resistors (page 677 of the Digi-Key Sept-Dec 2002 catalog). The 2 watt parts (OY series) are $1.00 each, come in low values (<1K ohm), an
/archives//html/Topband/2003-12/msg00164.html (7,509 bytes)

58. Re: Topband: Key Clicks Observation From Weekend (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Mon, 26 Jan 2004 22:38:44 -0800
I was having lunch with a friend last Friday who just happens to be an ARRL official observer. He joked that he had his pile of cards ready for all the FT1000MP owners who would be on in the 160 cont
/archives//html/Topband/2004-01/msg00255.html (10,080 bytes)

59. Re: Topband: Key Clicks Observation From Weekend (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Tue, 27 Jan 2004 05:20:05 -0800
Relax, Tom. He was just kidding around. I can assure you that this is one guy who takes his responsibility as an OO very very serious. In fact, in general he is a very serious and responsible guy. I
/archives//html/Topband/2004-01/msg00259.html (9,347 bytes)

60. Re: Topband: Receivers, Noise Blankers and Key Clicks (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Wed, 4 Feb 2004 00:29:52 -0800
On a related topic, I just got done "declicking" the local club's Yeasu FT-1000 per the procedure on Tom's website. In order to see just how dramatic the improvement was, I decided to do a pre and po
/archives//html/Topband/2004-02/msg00029.html (12,247 bytes)

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