Follow-up: This source arced itself out Friday (the 15th). It was down to only S9+10 dB from its onset Tues night at S9+30 dB. It had also become intermittent. Also, the Status LED no longer shows
Author: Curt Bartholomew via RFI <rfi@contesting.com>
Date: Fri, 1 Mar 2019 19:57:15 +0000
Just a note to thank the many contributors to this reflector. The shielded cables issue is surprising. I forwarded it to several fellow FCC engineers. Thanks also to Jim K9YC for his great tutorials.
Author: Curt Bartholomew via RFI <rfi@contesting.com>
Date: Fri, 8 Mar 2019 17:57:50 +0000
Don, WD8DSB: Kudos to you for your due diligence. Some Fire Alarm Control Panels and their sensors are also known to trigger their fire alarms when a fairly strong HF signal (100 W) is transmitted ne
Author: Edward Mccann via RFI <rfi@contesting.com>
Date: Wed, 8 May 2019 12:44:01 -0700
Sent from my iPhone _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
My observations on a 2015 Prius V: Mostly from 40 and 20 meter mobile operation: some RFI birdies, etc., with the car on but not moving. Moderate RFI when moving but not pushing the car. Severe RFI (
Author: Tony Brock-Fisher via RFI <rfi@contesting.com>
Date: Sun, 2 Jun 2019 08:51:02 -0400
Tony et al This sounds pretty hard to believe to me. The panels normally contain no active circuitry, so it's hard to see how they could be generating RFI. The panels may have a series diode. Additio
Author: Tony Brock-Fisher via RFI <rfi@contesting.com>
Date: Mon, 3 Jun 2019 12:42:46 -0400
Randy I've done some testing on the optimizers. If you apply DC to the panel input leads, the internal switcher will start up and power the internal microprocessor. However, after that, to put it int
Author: "EDWARDS, EDDIE J via RFI" <rfi@contesting.com>
Date: Wed, 12 Jun 2019 13:22:52 +0000
I notice theyre isnt much concern with the RFI problems as there is with lower efficiency: https://www.sciencealert.com/scientists-identify-a-key-flaw-in-solar-panel-efficiency-after-40-years-of-sear
Author: "EDWARDS, EDDIE J via RFI" <rfi@contesting.com>
Date: Wed, 12 Jun 2019 19:19:10 +0000
Don, There was a recent RFI group exchange on this list regarding possible ways that the cells themselves could create some RFI issues. But I don't think this was based on anyone's findings in the fi
Author: Leonard Halvorsen via RFI <rfi@contesting.com>
Date: Thu, 11 Jul 2019 14:24:43 -0400
What's the general consensus on good portable radios for use in tracking-down RFI (and general listening)? I have heard the Tecsun-880 is a good performer. Any other recommendations??? Leo H. WA2AMW
Done the "right way" (always gets the job done) - Here is what I use: https://powerlinenoiseallentexas.wordpress.com/df-equipment/ The rotatable cardioid (nearly unidirectional) pattern achieved in t
Yes, I think the utility value of these Coastal Navigator units has gone up in recent years reflecting an increasing price; I know two hams here in Texas who have bought units, and I own a couple mys
The "Quarter wave rule" - should be one of the *first* things one learns about "RF". A quarter wave inverts the impedance seen - open becomes a short and a short becomes an open (STATING it very suc
What does it sound like in AM mode? At this point it doesn't match anything I'm familiar with or tracked down in the past. de Jim WB5WPA On Tuesday, July 23, 2019, 9:59:36 AM GMT-5, Dan K2YWE <dan.k2
Dashes, not minus signs? dBuV is deciBels relative to a microvolt. A uV is very small voltage, 1 x 10^-6 Volts. de Jim WB5WPA Part 18 216 to 1000 MHz -23 dBµV/m Part 15 216
For radiated emissions. On conducted measurements, it's just dBuV, a voltage reading referred to 1 microVolt. Usually measured on one of the output 'ports' of the LISN (Line Impedance Stabilization
Author: ROGER STEPHENS via RFI <rfi@contesting.com>
Date: Sat, 10 Aug 2019 16:03:03 -0400
Listmates - after 60 good years in our hobby with more than enough rfi sniffing and eventually eliminating I have met my match. I ventured yesterday into my infirmed and mideighties afghan neighbors
Author: Leonard Halvorsen via RFI <rfi@contesting.com>
Date: Thu, 15 Aug 2019 17:56:16 -0400
Don't any schematics exist anymore of the old, original LINEAR Charge Controllers? If all you're going to do is charge a deep-cycle battery or three, and don't need to "optimize" anything to put it o
Author: Leonard Halvorsen via RFI <rfi@contesting.com>
Date: Fri, 23 Aug 2019 10:20:35 -0400
Sounds to me like it's time for a law suite - or at least the threat of one. Can't the ARRL help you with this - especially with legal issues? _______________________________________________ RFI mail
Author: Leonard Halvorsen via RFI <rfi@contesting.com>
Date: Fri, 23 Aug 2019 10:27:16 -0400
Us older guys remember something called Q-DOPE. We used it at the Lab to attach all kinds of stuff, not just on coils. Can you even GET that stuff anymore? Leo H. WA2AMW Martin, About the only way to