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Total 87 documents matching your query.

41. Re: Topband: [PVRC] AC line safety capacitors (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Thu, 5 Feb 2015 16:52:47 -0500
When I was fixing TV's in my high school days, RCA used a ceramic capacitor across the AC line just inside the chassis. Caused all kind of fires. They tried their best to replace them all. Jim - KR9U
/archives//html/Topband/2015-02/msg00203.html (9,725 bytes)

42. Topband: Modeling a BOG (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sat, 21 Feb 2015 19:51:21 -0500
I am trying to model a BOG (Beverage On or in the Ground). I have access to NEC4 and I am using the 4NEC2 interface. As soon as I drop the antenna below ground level, approx. 2 ft. without errors, I
/archives//html/Topband/2015-02/msg00567.html (7,028 bytes)

43. Re: Topband: Modeling a BOG (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sat, 21 Feb 2015 20:50:12 -0500
Mike, The reason the beverage wire in the model is 2 ft. below the surface is to have it away from the ground somewhat and have a nice segment length from the wire to ground on each end. The model sh
/archives//html/Topband/2015-02/msg00571.html (8,112 bytes)

44. Re: Topband: Modeling a BOG (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sun, 22 Feb 2015 00:05:06 -0500
Here is a PDF that has the plots and the NEC Model. http://www.wolfrfsystems.com/BOG.pdf Jim KR9U From: Mike Waters [mailto:mikewate@gmail.com] Sent: Saturday, February 21, 2015 9:34 PM To: jbwolf@co
/archives//html/Topband/2015-02/msg00574.html (8,041 bytes)

45. Re: Topband: Modeling a BOG (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sun, 22 Feb 2015 23:36:20 -0500
Mike, Thats the plan, however its warm in the shack and bitter cold outside. Thanks, Jim KR9U From: Mike Waters [mailto:mikewate@gmail.com] Sent: Sunday, February 22, 2015 9:01 PM To: jbwolf@comcast.
/archives//html/Topband/2015-02/msg00589.html (9,684 bytes)

46. Re: Topband: Brave New World (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Wed, 25 Feb 2015 16:41:01 -0500
Maybe NET Neutrality will take care of this for us. :-( I can understand why people are upset about this. But the reality is that no matter how upset we decide to be about this sort of thing, it's si
/archives//html/Topband/2015-02/msg00627.html (8,775 bytes)

47. Re: Topband: ham radio- NOT (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Thu, 26 Feb 2015 21:01:45 -0500
Larry, Look at the bright side. Maybe on your next DXpedition, you can work yourself remotely from your home station and get a new country ! Jim - KR9U it's sad, very sad about the changes to ham rad
/archives//html/Topband/2015-02/msg00705.html (10,047 bytes)

48. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sat, 28 Feb 2015 01:06:31 -0500
Jim, This brings up something I have been wondering about. You make several good points that I agree with. However, on one hand we have a very lossy earth (for instance sand) which would mean less co
/archives//html/Topband/2015-02/msg00759.html (11,234 bytes)

49. Re: Topband: Modeling "Ground" and losses (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sat, 28 Feb 2015 21:23:50 -0500
Richard, You have just upset the apple cart for me. For the sake of argument, assume a monopole with a single radial in free space. I would assume that this would be a somewhat efficient antenna with
/archives//html/Topband/2015-02/msg00780.html (17,718 bytes)

50. Topband: HFTA (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Fri, 17 Jul 2015 20:10:55 -0400
I wonder if someone can help me with getting the terrain for HFTA. It appears that the Microdem site has a virus in their program download. When I try to install the version from the web site, it tri
/archives//html/Topband/2015-07/msg00130.html (7,576 bytes)

51. Re: Topband: HFTA (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Fri, 17 Jul 2015 20:56:07 -0400
This is great! Thanks for the help. It makes up for the hours I spent trying to get Microdem working. I've sent for my profile. Jim - KR9U I agree with you Ken. The K6TU site is the way to go for gen
/archives//html/Topband/2015-07/msg00133.html (10,330 bytes)

52. Re: Topband: KD9SV-OK1RR relays ??? (RX Front End Protector) (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sun, 30 Aug 2015 21:00:09 -0400
Mike, The Array Solutions device also uses the transformers to increase the voltage at the diodes then steps it back down which means that the diodes are not doing their limiting at 50 ohms. Therefor
/archives//html/Topband/2015-08/msg00135.html (10,668 bytes)

53. Re: Topband: ADC Overload (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Mon, 12 Oct 2015 23:44:38 -0400
Jim, I sense a flaw in the CLT argument, which is likely a lack of understanding on my part. What you are describing sounds more like AGC action. In-other-words, moving the minimum detector level up
/archives//html/Topband/2015-10/msg00088.html (37,514 bytes)

54. Re: Topband: K9AY antenna (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Thu, 15 Oct 2015 11:52:30 -0400
Is this a home brew or a commercial product? If commercial whose is it? Jim Hello: CB1H contest instaled a K9AY antenna. But no hear nothing. I Follow the instruction step by step. We used FT 1000 MP
/archives//html/Topband/2015-10/msg00111.html (7,413 bytes)

55. Re: Topband: RFI - Lots of it (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Sun, 25 Oct 2015 20:09:07 -0400
Jim, At each location where I have lived, I have had line noise problems. It turns out that the main culprit has been the insulators on the pole were either dirty or cracked by lightning or loose har
/archives//html/Topband/2015-10/msg00172.html (9,554 bytes)

56. Re: Topband: Re. RFI - lots of it (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Mon, 26 Oct 2015 14:35:19 -0400
Jim, If the noise is higher during a rain and quiets at least some while dry, that usually indicates insulator dirt or breakdown. Have them replace it anyway. If it has arced in the past it will be p
/archives//html/Topband/2015-10/msg00180.html (8,938 bytes)

57. Topband: Rodents and such things (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Fri, 13 Nov 2015 14:56:05 -0500
Putting mothballs in an old sock in the area of intrusion usually around the lower engine or transmission has worked here. Jim - KR9U _________________ Topband Reflector Archives - http://www.contest
/archives//html/Topband/2015-11/msg00096.html (6,478 bytes)

58. Re: Topband: Comments on High Performance RX Antennas for a Small Lot (Webinar) (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Fri, 4 Mar 2016 13:56:57 -0500
It seems as though if data were taken as to categorize the (average or typical) noise temperature with the angle of intensity of atmospheric noise that this could be utilized as part of the RDF equat
/archives//html/Topband/2016-03/msg00076.html (12,967 bytes)

59. Topband: VK0EK Operation (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Tue, 29 Mar 2016 14:57:09 -0400
Anyone else have problems with the close split on 80 and 160 last night? Key clicks were at times were covering up their transmit signal, which here was not that strong. Jim - KR9U _________________
/archives//html/Topband/2016-03/msg00266.html (7,599 bytes)

60. Re: Topband: VK0EK Operation (score: 1)
Author: "James Wolf" <jbwolf@comcast.net>
Date: Tue, 29 Mar 2016 17:12:02 -0400
Jim, That's fine, but it doesn't help the immediate situation at hand. And yes, that is the problem. K9UWA and KD9SV who are close to me running K3's didn't give me the problem that others did. I did
/archives//html/Topband/2016-03/msg00273.html (8,926 bytes)

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