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Total 83 documents matching your query.

1. Re: [RFI] CQ-BPL (score: 1)
Author: edoc <>
Date: Fri, 30 Jan 2004 13:19:14 -0500
Perhaps the ARRL can post a Web page to provide assistance to CQ-BPL contestants in the design of longwire antennas? These antennas would run parallel to the BPL lines with the goal of using them as
/archives//html/RFI/2004-01/msg00062.html (8,943 bytes)

2. Re: [RFI] CQ-BPL (score: 1)
Author: edoc <>
Date: Fri, 30 Jan 2004 13:29:59 -0500
Bill Turner wrote: On Fri, 30 Jan 2004 13:14:40 -0500, Tom Cox wrote: It just makes sense -- if their signal doesn't leave the power line and interfere with area radio users, our signal shouldn't ent
/archives//html/RFI/2004-01/msg00064.html (8,213 bytes)

3. Re: [RFI] interesting new device (score: 1)
Author: edoc <>
Date: Thu, 05 Feb 2004 12:32:38 -0500
So there will now be coded/scrambled transmissions on 440? (Or so one would guess would be the garbage pouring forth from these devices.) How will the FCC know if it is one of these devices, a Ham ru
/archives//html/RFI/2004-02/msg00011.html (9,562 bytes)

4. Re: [TenTec] Noisy RF Environment (score: 1)
Author: doc <>
Date: Wed, 05 Jan 2005 22:42:11 -0500
Offer a free upgrade, perhaps an onboard MP3 device or something, in exchange for them allowing you to add a RFI filter. OR, Offer a trade-in toward better scooters that are RF-clean then sell their
/archives//html/RFI/2005-01/msg00005.html (7,577 bytes)

5. [RFI] Are All Low-Pass Filters Alike? (score: 1)
Author: doc <>
Date: Tue, 16 Aug 2005 10:39:09 -0400
I want to use the switched filters at the output of a 1KW solid state amp to prevent harmonics from escaping to the antenna. I have 40 & 20M B&W low pass filters and a ParaDynamics 10M so far. I have
/archives//html/RFI/2005-08/msg00030.html (7,106 bytes)

6. Re: [RFI] Are All Low-Pass Filters Alike? (score: 1)
Author: doc <>
Date: Tue, 16 Aug 2005 11:52:37 -0400
A pair of TexasStar Sweet Sixteens in which the transformers and splitter combiners have been replaced with components designed for 160-10M. Also added is a splitter at the input and a combiner at th
/archives//html/RFI/2005-08/msg00032.html (7,821 bytes)

7. Re: [RFI] Power Line Ultrasound Detector (score: 1)
Author: doc <>
Date: Tue, 16 Aug 2005 12:35:07 -0400
What about using one of the parabolic mic gadgets that one sees in the catalogs now and then. Should only require limited mods. doc -- Thanks! & 73, doc kd4e {| /\ {| / \ {| / \ {| / @ \ {| ==\ # htt
/archives//html/RFI/2005-08/msg00034.html (8,730 bytes)

8. Re: [RFI] BPL vs shares & ham radio....KATRINA (score: 1)
Author: doc <>
Date: Sat, 03 Sep 2005 10:50:33 -0400
Amen and amen! I have been enjoying the discussion on the towertalk re. the value of quads in resisting certain types/sources/causes of rf noise. I would also be interested in any mobile filters folk
/archives//html/RFI/2005-09/msg00006.html (10,211 bytes)

9. Re: [RFI] A `Time Bomb' Sits Atop Utility Poles (score: 1)
Author: kd4e <>
Date: Wed, 14 Sep 2005 20:50:12 -0500
Why did they not put a flexible liner between the two? We have a similar problem n our new steel-shell home. I am sitting here listening listening to creaking, cracking, and grinding. The problem is
/archives//html/RFI/2005-09/msg00022.html (8,637 bytes)

10. Re: [RFI] A `Time Bomb' Sits Atop Utility Poles (score: 1)
Author: kd4e <>
Date: Wed, 14 Sep 2005 21:24:56 -0500
So it is just Chance who may have taken a short-cut in design and manufacturing and left out the expansion material? -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Can we all j
/archives//html/RFI/2005-09/msg00024.html (9,233 bytes)

11. Re: [RFI] Can Fluorescent bulbs cause RFI problems? (score: 1)
Author: kd4e <>
Date: Sun, 25 Sep 2005 23:46:21 +0000
Most of the units produce massive RFI across a wide spectrum, the best of them will have some filtering but still generate RFI. The impact depends upon your setup. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/archives//html/RFI/2005-09/msg00046.html (7,640 bytes)

12. Re: [RFI] Can Fluorescent bulbs cause RFI problems? (score: 1)
Author: kd4e <>
Date: Mon, 26 Sep 2005 08:06:55 +0000
Dimmers, depending on design, are not necessarily noisy. The mechanical ones use a resistive wiper design and the surface becomes dirty and pitted over time. The cheap ones use too little surface an
/archives//html/RFI/2005-09/msg00051.html (9,069 bytes)

13. Re: [RFI] Flourescent lamp RFI (score: 1)
Author: kd4e <>
Date: Wed, 28 Sep 2005 12:38:05 +0000
Is there a good source of "older style transformer ballasts" to retrofit modern fixtures? We have florescent fixtures throughout our new house located over each window, purchased from Lowes and Home
/archives//html/RFI/2005-09/msg00064.html (8,499 bytes)

14. Re: [RFI] Front Load Washer/Dryer Advice (score: 1)
Author: kd4e <>
Date: Fri, 30 Sep 2005 12:24:31 +0000
It is highly improbably that a problem will show up using shielded coax cable to a more distant directional yagi that does not show up on a close-in portable 817 and vertical antenna. Do the local t
/archives//html/RFI/2005-09/msg00072.html (8,526 bytes)

15. Re: [RFI] Air Cleaner Interference (score: 1)
Author: kd4e <>
Date: Sun, 02 Oct 2005 19:55:20 +0000
Does he know that when you fire up your fully legal KW amp and drive those devices crazy he will have to contact the irresponsible manufacturers for the resolution -- because their devices are not s
/archives//html/RFI/2005-10/msg00003.html (8,607 bytes)

16. Re: [RFI] Motion control sensor (score: 1)
Author: kd4e <>
Date: Thu, 08 Dec 2005 13:53:36 +0500
Look for the ones that are labeled as quiet. One mfgrs rep told me that the cheap ones use narrow contact strips on the sliders and they get noisy quickly. Others use electronics that are always noi
/archives//html/RFI/2005-12/msg00019.html (7,699 bytes)

17. Re: [RFI] BPL news today's WSJ (score: 1)
Author: kd4e <>
Date: Mon, 19 Dec 2005 22:25:11 -0600
They had to get the money for this ill-advised investment from somewhere. One wonders on which golf course or at what party someone talked someone else into this foolishness. One would think that aft
/archives//html/RFI/2005-12/msg00054.html (8,088 bytes)

18. Re: [RFI] BPL news today's WSJ (score: 1)
Author: kd4e <>
Date: Tue, 20 Dec 2005 14:23:34 -0600
"minimal RFI" presumes the following: 1. They install everything according to spec. 2. They maintain everything to spec. So, in theory it is just 6M and above that is subject to RFI ... unless there
/archives//html/RFI/2005-12/msg00057.html (8,883 bytes)

19. [RFI] Blocking RFID Signals? (score: 1)
Author: kd4e <>
Date: Wed, 28 Dec 2005 22:10:42 -0600
On another list we have a discussion going as to how one might block/eliminate unwanted RFID communications. They are adding RFID tags, some active, some passive, to a wide varity of things including
/archives//html/RFI/2005-12/msg00078.html (9,193 bytes)

20. Re: [RFI] Monitor RFI (score: 1)
Author: kd4e <>
Date: Sun, 01 Jan 2006 14:46:06 -0600
Perhaps a battery source with a trickle charger would solve the wall wart noise problem? -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A blessed New Year to all! Thanks! & 73, doc kd4
/archives//html/RFI/2006-01/msg00003.html (8,417 bytes)

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