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References: [ +from:tcgroat@mesanetworks.net: 23 ]

Total 23 documents matching your query.

1. Re: [RFI] Computer cases and RFI (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Tue, 03 Jan 2006 19:53:55 -0700
The requirements for PC's custom assembled from tested component under a "Declaration of Conformity" are in sections 15.32 and 15.102 of the FCC rules <http://www.fcc.gov/oet/info/rules/part15/part15
/archives//html/RFI/2006-01/msg00023.html (8,762 bytes)

2. Re: [RFI] Any LM338 Regulator RFI? (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Tue, 10 Jan 2006 19:05:30 -0700
The LM338 is a linear regulator so it won't be a noise generator if it's stable. Use proper RF bypassing to prevent oscillation, taking care to keep the bypass cap leads leads short. The same bypass
/archives//html/RFI/2006-01/msg00042.html (7,482 bytes)

3. Re: [RFI] Tv interference (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Fri, 20 Jan 2006 19:15:27 -0700
No, appliances have an exemption written into Part 15: "Section 15.103 Exempted devices. The following devices are subject only to the general conditions of operation in Sections 15.5 and 15.29 and a
/archives//html/RFI/2006-01/msg00091.html (9,403 bytes)

4. Re: [RFI] California: The Switchers are HERE! (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Tue, 24 Jan 2006 21:46:46 -0700
This is California's version of EPA's "Energy Star" program for power adaptors. The goals of both programs are similar: reduce power use by improving both stand-by power use and operating efficiency.
/archives//html/RFI/2006-01/msg00107.html (8,811 bytes)

5. Re: [RFI] cell phone interference on airplanes (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Thu, 02 Mar 2006 20:51:39 -0700
(1) The flight crew is in control of the system. If it is causing interference, they can (and will!) shut it down, and write it up for the maintenance crew. (2) Air Fones aren't "cell phones" in the
/archives//html/RFI/2006-03/msg00012.html (8,176 bytes)

6. Re: [RFI] RFI Digest, Vol 45, Issue 3 (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Mon, 18 Sep 2006 22:35:33 -0600
Proper generator grounding depends upon what application the generator is being used for. Grounding methods required for one application are be expressly forbidden in others. Grounding requirements
/archives//html/RFI/2006-09/msg00022.html (7,941 bytes)

7. Re: [RFI] Low voltage lighting solid state "transformers" (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Sun, 17 Dec 2006 18:30:36 -0700
I have seen that, too. It has been quite common in low-end computer power supplies, as documented many tears back by W0UN. The same PC cards will be found in many "no-name" power supplies. The parts
/archives//html/RFI/2006-12/msg00043.html (9,813 bytes)

8. Re: [RFI] Low voltage lighting solid state "transformers" (long,somewhat OT) (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Tue, 19 Dec 2006 21:49:34 -0700
Not quite! They are *recognized components*, but that is not the same as a Listed finished product. Note the backwards "RU" (USA) and "cRU" (Canada) approval logos in the photo <http://www.hrelamppa
/archives//html/RFI/2006-12/msg00059.html (9,930 bytes)

9. Re: [RFI] Help on speed drive motor controller RFI (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Mon, 29 Jan 2007 19:08:04 -0700
The product brochure Juan linked to shows RFI filters as accessories. It appears they need to be ordered separately and assembled on-site. The installation manual may also specify that the motor lead
/archives//html/RFI/2007-01/msg00035.html (8,890 bytes)

10. Re: [RFI] Sorenson DCS 55-55 PS Clean? (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Sat, 07 Apr 2007 15:22:08 -0600
You can read the manual here: <http://theelectrostore.com/datasheets/dcs55-55_nig.pdf> (warning: long file!). On page 4, it says the power supply is certified to meet FCC Class "A" emissions. In othe
/archives//html/RFI/2007-04/msg00002.html (7,565 bytes)

11. Re: [RFI] Is a Micrometals T44-52 a useful Ham toroid? (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Sat, 07 Jul 2007 15:33:40 -0600
Technical information can be found at <http://www.micrometals.com/materials_index.html>. In general, #52 is a "power conversion" material: mu = 75, but poor Q at RF. The low permeability allows it to
/archives//html/RFI/2007-07/msg00010.html (8,283 bytes)

12. Re: [RFI] Battery charger RFI (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Thu, 27 Sep 2007 21:25:27 -0600
(1) Regarding the charger type: If it was sold for an RV, that charger most likely is a multi-mode charger that switches to a float charge "maintenance mode" after the main recharging is done. Though
/archives//html/RFI/2007-09/msg00029.html (9,869 bytes)

13. Re: [RFI] Cellphone-Jammer Fad - Harmful to Ham Radio? (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Mon, 05 Nov 2007 15:47:46 -0700
Assuming this device actually works as advertised (a big assumption for illegal equipment!), the potential interference would be worst on bands near the cell phone assignments: 903MHz, 1.2GHz, and 2.
/archives//html/RFI/2007-11/msg00006.html (7,604 bytes)

14. Re: [RFI] PC Power Supply Noise (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Wed, 26 Dec 2007 15:27:20 -0700
I've also used this method, based on W0UN's recommendation that appeared many years ago on one of these contesting.com reflectors. Measure the clearances inside the supply first, because the filtered
/archives//html/RFI/2007-12/msg00058.html (8,101 bytes)

15. Re: [RFI] TV RFI - an update 2 (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Thu, 14 Feb 2008 20:53:55 -0700
That sounds like a powdered iron core. It's good for high-Q inductors at lower HF frequencies, such as for tuned circuits or transmitter output filters. It's not so effective for common-mode RFI chok
/archives//html/RFI/2008-02/msg00034.html (7,405 bytes)

16. Re: [RFI] 6M Getting into TV Channel 3 (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Sun, 06 Jul 2008 15:05:57 -0600
Do you really need the distribution amplifier? The TV antenna and amplifier are both rather broad band, and process your 6M signal along with the VHF TV signals. Interfering with all channels sounds
/archives//html/RFI/2008-07/msg00010.html (8,059 bytes)

17. Re: [RFI] BrightHouse & RFI? (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Sat, 23 Aug 2008 08:30:18 -0600
That's true in part, but there's a catch. Digital broadcasts use an error-correction code so that low levels of interference still allow perfect reception. But if enough bits get scrambled, the error
/archives//html/RFI/2008-08/msg00034.html (8,050 bytes)

18. Re: [RFI] Car Advice (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Wed, 31 Dec 2008 17:29:45 -0700
My wife has an '05 Malibu. I'm curious whether there's been any reported immunity issues with GM's electronic power steering system (I've never put a mobile rig in her car, so I have no first-hand k
/archives//html/RFI/2008-12/msg00133.html (8,062 bytes)

19. Re: [RFI] 22 inch lcd monitor power supply noise (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Tue, 24 Feb 2009 20:13:53 -0700
The symptoms you describe suggest capacitive coupling from the internal high-frequency parts to nearby metal and wiring (that's not the only possibility, but it seems likely). There are many construc
/archives//html/RFI/2009-02/msg00127.html (8,240 bytes)

20. Re: [RFI] Question About RFI Chokes (score: 1)
Author: Tim Groat <tcgroat@mesanetworks.net>
Date: Tue, 15 Sep 2009 23:50:24 +0000
Don't bend coax too tightly, especially foam-insulated coax like RG-6. If you do, the center conductor can pull through the foam and short out to the shield (perhaps not immediately, it may work for
/archives//html/RFI/2009-09/msg00048.html (7,189 bytes)

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