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References: [ +from:ingraham.ma.ultranet@rcn.com: 94 ]

Total 94 documents matching your query.

1. Re: [RFI] RFI from Astron power supply (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Mon, 4 Jun 2007 09:37:48 -0400
Here is my crude understanding. Fluorescent lights require a somewhat large voltage to fire, but the voltage then drops way down. The ballast I think allowed that to happen, and was basically a larg
/archives//html/RFI/2007-06/msg00001.html (7,907 bytes)

2. Re: [RFI] TVI (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Fri, 22 Jun 2007 09:10:16 -0400
Keep in mind that channel 2 is 54-60 MHz, and the TV's IF frequency is 40-46 MHz. Not an easy "neighborhood" to be in. Instead of lugging the Panasonic up, you might try bringing the Sylvania downsta
/archives//html/RFI/2007-06/msg00028.html (7,258 bytes)

3. Re: [RFI] N6CW TVI (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Sat, 23 Jun 2007 08:17:21 -0400
*I* missed this (the second part). I don't recall Terry saying anything about channel numbers where the RFI was happening. We don't even know if it's all channels or only one. The fact that he didn'
/archives//html/RFI/2007-06/msg00033.html (7,280 bytes)

4. Re: [RFI] Ethernet Extenders (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Tue, 26 Jun 2007 22:12:19 -0400
I'm no expert on this, but suggest a few other things to try or ask. Does the link fail if you issue the command but have the transceiver disabled so that it doesn't transmit? Or if it's already tran
/archives//html/RFI/2007-06/msg00050.html (8,310 bytes)

5. Re: [RFI] Ethernet RFI UPDATE (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Mon, 2 Jul 2007 18:54:06 -0400
Even at 5W into a dummy load, a quarter of a mile away? Wow. Andy _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2007-07/msg00006.html (7,322 bytes)

6. Re: [RFI] High Efficience Furnaces (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Thu, 19 Jul 2007 20:28:44 -0400
Interesting! Why is that? I don't have natural gas anymore (the only house in the neighborhood without it, even the one across the street has it but the gas co. tells me the main doesn't run past MY
/archives//html/RFI/2007-07/msg00021.html (7,589 bytes)

7. Re: [RFI] Are nuvistors sturdier than transistors? (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Thu, 30 Aug 2007 19:20:58 -0400
Transistors age because the impurities migrate, and the doped areas and junctions eventually blur, due to entropy. Migration is much more pronounced in Ge than Si, so you can see aging happening yea
/archives//html/RFI/2007-08/msg00059.html (8,749 bytes)

8. Re: [RFI] VDSL (off topic now, but I had help) (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Fri, 31 Aug 2007 17:28:39 -0400
Verizon ran the fiber into my neighborhood last year, right past my house. A couple months ago they started mailing flyers asking me to sign up. Unfortunately, Verizon doesn't think they have fiber
/archives//html/RFI/2007-08/msg00066.html (8,810 bytes)

9. Re: [RFI] VDSL (off topic now, but I had help) (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Sat, 1 Sep 2007 17:44:37 -0400
Would you take your internet service from a company whose server computer can't figure out that their fiber running past your house, runs past your house? Maybe eventually, but I'd think twice about
/archives//html/RFI/2007-09/msg00001.html (7,134 bytes)

10. Re: [RFI] Mystery 70 cm Repeater Input RFI/EMI? (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Fri, 12 Oct 2007 22:11:05 -0400
What kind of radar is it? If it's a phased-array type, it won't necessarily have any "sweep" pattern and could be semi random. You are some distance from Beale so it's probably not their PAVE PAWS.
/archives//html/RFI/2007-10/msg00037.html (7,842 bytes)

11. Re: [RFI] RFI from street lights - finding source? (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Sun, 14 Oct 2007 15:17:16 -0400
the If it's a buzzing sound like the one posted earlier, then it's unlikely to be radar. Andy _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contest
/archives//html/RFI/2007-10/msg00055.html (8,501 bytes)

12. [RFI] RFI from Electronic Fluorescent Lights (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Wed, 17 Oct 2007 12:20:38 -0400
Here's a short "Technical Tidbit" from Doug Smith about EMI/RFI from electronic fluorescent lights: http://emcesd.com/tt2007/tt090407.htm It is somewhat light on content, as it is meant to make hardw
/archives//html/RFI/2007-10/msg00057.html (7,017 bytes)

13. Re: [RFI] OT? Why Does 1450 Wobble & 970 Not? (score: 1)
Author: "Andrew Ingraham" <ingraham.ma.ultranet@rcn.com>
Date: Wed, 21 Nov 2007 16:11:03 -0500
If it's random, it might be fading, due to skywave and changing ionospherics. The lower frequency may be less effected by it because of a more solid groundwave. If it's regular, it might be a beat f
/archives//html/RFI/2007-11/msg00081.html (8,700 bytes)

14. Re: [RFI] CFL's (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Thu, 13 Dec 2007 18:57:48 -0500
Our first two compact fluorescents that I recall us using, have been in use since we got them (maybe 15 years ago?). They don't get used many hours per day anymore, but one is still used regularly. S
/archives//html/RFI/2007-12/msg00026.html (7,322 bytes)

15. [RFI] "Wired Science" on RFI (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Wed, 26 Dec 2007 21:49:45 -0500
This week's PBS program "Wired Science" has a segment on the RF 'quiet zone' in Virginia/West Virginia where RFI isn't allowed, in order to protect radio astronomy and other sensitive operations in t
/archives//html/RFI/2007-12/msg00065.html (7,093 bytes)

16. Re: [RFI] Evils (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Sun, 2 Mar 2008 15:53:08 -0500
Nit: Actually it's 3.5795454545.. Andy _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2008-03/msg00002.html (6,488 bytes)

17. Re: [RFI] Router RFI (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Sat, 26 Apr 2008 11:19:19 -0400
Why do routers cause RFI ...? Wired routers do not intentionally radiate. But some do, probably because they are poorly designed. Just like many other modern electronic devices. Wireless routers are
/archives//html/RFI/2008-04/msg00041.html (8,573 bytes)

18. [RFI] Battery Minder chargers/desulphators (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Tue, 17 Jun 2008 23:02:18 -0400
I've been considering those storage battery charger/maintainers with multiple charging phases for maintaining a 12V lead-acid storage cell without overcharging, especially the ones that have a desulf
/archives//html/RFI/2008-06/msg00003.html (7,230 bytes)

19. Re: [RFI] rfi from Refrigerator (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Tue, 24 Jun 2008 12:42:50 -0400
in And it may also help if you can suggest to him a few of the things that might cause it to have that symptom ... such as an arcing thermostat switch, or something of that nature. Something that sp
/archives//html/RFI/2008-06/msg00010.html (7,854 bytes)

20. Re: [RFI] So-Called Utility "Smart Meters" (score: 1)
Author: "Andy" <ingraham.ma.ultranet@rcn.com>
Date: Wed, 13 Aug 2008 13:38:55 -0400
A few comments... It was said that there's at least two frequency ranges being used by these meters: 900 MHz, and "PLC", which I believe means LF, MF, or HF frequencies carried by the power lines, si
/archives//html/RFI/2008-08/msg00016.html (10,242 bytes)

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