- 1. [RFI] likely frequency for LED bulbs? (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Fri, 09 Jan 2015 14:22:06 -0500
- I have 2 LED bulbs (60W incandescent replacement) and have been unable to hear them, which is good. Today I bought 3 more types (at the local Ace, because I can return them if they make noise). So I'
- /archives//html/RFI/2015-01/msg00026.html (7,902 bytes)
- 2. Re: [RFI] likely frequency for LED bulbs? (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Fri, 09 Jan 2015 20:14:34 -0500
- [build current probe] Thanks; that should get me far more accurate data than what I did. Since sending my earlier note, I made some measurements. I have posted them at: http://www.lexort.com/blog/ama
- /archives//html/RFI/2015-01/msg00028.html (7,115 bytes)
- 3. Re: [RFI] likely frequency for LED bulbs? (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Sat, 10 Jan 2015 07:52:33 -0500
- I was surprised when I got the first one. Please note that I said I have other RFI sources; an attic antenna is not a good situation to start with. I had dealt with a number of them, but the base lev
- /archives//html/RFI/2015-01/msg00033.html (8,130 bytes)
- 4. Re: [RFI] RFI With Smoke Detectors (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Fri, 21 Aug 2015 11:31:30 -0400
- Have you tested/evaluated the RadioWorks T-4G+ line isolator, or the similar things from MFJ? I know you recommend many turns around specific mixes, but I'm curious what the shield impedance is on th
- /archives//html/RFI/2015-08/msg00073.html (9,122 bytes)
- 5. Re: [RFI] led bulb test (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Thu, 10 Nov 2016 08:26:59 -0500
- I have also been trying to make measurements, but so far just looking at a PX3 hooked up to either an attic dipole or a proper outside antenna. Operationally for me, if I can't hear the difference be
- /archives//html/RFI/2016-11/msg00020.html (9,091 bytes)
- 6. Re: [RFI] led bulb test (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Thu, 10 Nov 2016 12:15:46 -0500
- Certainly I didn't mean part 15 compliance was good enough. What I was getting at is that while I can install a device where I would use it and turn it on and off and see if I can hear it, I wonder i
- /archives//html/RFI/2016-11/msg00022.html (8,978 bytes)
- 7. Re: [RFI] FIOS vs DSL (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Thu, 23 Feb 2017 15:56:47 -0500
- As others said, FiOS is a Verizon trademark for what used to be called Fiber To the Premises (FTTP). The way it works is similar to Hybrid Fiber Coax cable systems, where there is fiber to boxes on p
- /archives//html/RFI/2017-02/msg00059.html (10,614 bytes)
- 8. Re: [RFI] Power Over Ethernet from Switch Mode Power supplies (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Mon, 08 Jul 2019 12:32:57 -0400
- You didn't mention what kind of equipment, and I'm not sure why not, as the collection of anecdotes is somewhat helpful to others. I have measured some Ubiquiti access points (they come with 24V supp
- /archives//html/RFI/2019-07/msg00005.html (10,019 bytes)
- 9. Re: [RFI] Charge controllers (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Thu, 15 Aug 2019 21:22:41 -0400
- These exist, and they are basically voltage regulators. Which means for a nominal 100W panel they are dissipating 18V-13V = 5V * 5A = 25W. So you only get 2/3 of the power out of your panel. If that
- /archives//html/RFI/2019-08/msg00026.html (7,980 bytes)
- 10. Re: [RFI] RFI-free Vehicle 5v USB Adapter? (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Sun, 15 Mar 2020 20:41:54 -0400
- A few datapoints: I have a few Anker dual-port lighter/USB devices. WIth them in the shack, charging phones, and running an esp8266, I don't hear them. That of course doesn't prove totally quiet; it
- /archives//html/RFI/2020-03/msg00038.html (8,528 bytes)
- 11. [RFI] Epic PWRgate charging noise? (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Fri, 01 May 2020 10:11:25 -0400
- I realize this is a difficult question, but I wonder if anyone has experience with the West Mountain Radio Epic PWRgate and would be willing to comment on whether noise was perceptible or not under w
- /archives//html/RFI/2020-05/msg00002.html (7,039 bytes)
- 12. Re: [RFI] Strong RFI on 2m (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Wed, 22 Dec 2021 10:53:02 -0500
- Did you put in e.g. a 10 dB pad and verify that the noise drops (only) 10 dB? Given what you said, I would not expect otherwise, but a good test to do. Have you tried to look over much wider bandwidt
- /archives//html/RFI/2021-12/msg00082.html (6,547 bytes)
- 13. Re: [RFI] Choosing a POE in a RF-rich environment (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Sat, 20 May 2023 20:01:27 -0400
- There's a very deep question lurking. We more or less take on faith that cables that are outside are dangerous and ones entirely inside are safe. But the house is often not a sealed metal box. I'd be
- /archives//html/RFI/2023-05/msg00006.html (7,526 bytes)
- 14. Re: [RFI] medical lab RFI (score: 1)
- Author: Greg Troxel <gdt@lexort.com>
- Date: Wed, 19 Jul 2023 19:08:56 -0400
- 1) RFI usually has the connotation that "something else is creating RF that it shouldn't and it is interfering with my (sensitive) receiver". There is also "something is transmitting within its allow
- /archives//html/RFI/2023-07/msg00031.html (8,306 bytes)
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