Tony, Before you go to HD check with them to make sure they still recycle. My HD in Lake Zurich, IL stopped recycling fluorescent tubes recently. They still take the curly CFLs. I would hate to see y
Read the archives a couple months back; I located a source thatwas pounding into the QTH at 15 dB over S9. The arcing source was 5 (FIVE) miles away tearing me up on160 meters! I have had similar 'a
Like most absolutes in life, this one is not absolute.There is a device which you MUST track by itsnoise signature the Sling Media Homeplug Ethernet device. In Europe it is called PLT. It uses a ho
My suggestion: Track it down and then ID it; manufacturers today are employing 'clock dithering techniques' to avoid any specific, individual, high amplitude single-frequency emissions in order to pa
The fact, as I see it, that the 'signal' is spaced evenly every xxx kHz identifies the signal as that of one originating uniquely, in my mind, from a "Switching power supply". I have seen broad 'hump
Yup.Many returns on 'clock dithering' too. This could have saved us some blood and sweat at a critical time (EMI pre-screening) a few years back on a new product but the digi-whizes had not incorpora
If of interest to anyone, I can provide the model number of a commercial RFI filter that worked quite handsomely on a local grow operation. No it's not my grow. I run a police department and, it's a
Until evidence is presented otherwise, I don't think we can assume the ARRL is 'all over this' FCC RFI inquiry. I contacted the gentleman who was listed at the end of the document. First, his ARRL
And IBOC... Sent via the Samsung Galaxy NoteŽ II, an AT&T 4G LTE smartphone <div>-- Original message --</div><div>From: Peter Laws <plaws0@gmail.com> </div><div>Date:06/22/2016 7:14 PM (GMT-05:00) </
re: ZS1AN's cascade Are we talking ferrite loaded TLTs (transmission line transformer) or flux coupled transformers and ferrite loaded "chokes" in his design? I can never keep this current-voltage ba
Really, the point was towards the one K9YC Jim made, that we should be using the proper nomenclature rather than "inventing" new terms coined in trade pubs or "popular" articles that don't work towar
Avoiding the twin evils of theft and cross pollination. These folks understand the art and science well. Why do you need grow lights in the desert? I can see hiding the plants if growing is not
There are a couple participants on this board who have direct experience with industrial wiring practices that minimize radiated EMI emissions. I am a city manager and have the opportunity to discus
Gentlemen, Thank you for well considered input. 1) Mention was made of using twisted pair. Is that practical for 40 horsepower motors? 2) I recall from past board discussions the necessity of minimiz
Read the two links on this subject. Noted our current highest office holder has his fingers in the RF pie somewhat by issuing a edict of small sorts. There is enough (spectrum) room if allocated corr
Question: was the noise all over the AM band or was it on a specific frequency? Tnx, Gary...wa6fgi Michael C. Martin RFI Services PO Box 411 Traceys Landing, MD 20779 240.508.3760 mike@rfiservices.co
The Icom PS-125 comes closest to noiseless that I have found, WHEN they are working right. I have one that emits noise that can be received in places on 160 meters, yet another that is totally quiet.
Yep, all of that current could be common-mode :-) Identical current indication on a matched pair of thermocouple RF amp meters do not necessarily mean the transmission is balanced as the current magn
Author: Edward McCann via RFI <rfi@contesting.com>
Date: Sun, 7 Aug 2016 19:44:04 -0700
Don: Nice report! Could you address the difference between "tuned" and "untuned" feeders to which refer. I have yet to read a description of this phenomena or technique that I can honestly say I full