You have found legitimate reasons for improper power. We have a station in Fort Collins, Colorado, KCOL on 600 kHz that routinely refuses to reduce power as they should during prescribed night time h
Gary, and all: Yes, I'm painfully aware of the reduction in staff (RIFF....) at FCC. I "believe" we still have an office in Denver, but my direct experience with them was some decade ago (the large a
Interesting when we lived in Albuquerque from 1980 to 1995. Most of the RF services for the city and much of central and northern New Mexico resided on Scadia Peak at the eastern side of Albuquerque.
In the "old" days, we put copper and iron into the modulation transformer. Some really hefty installations even "modulated" the concrete floor on which they were mounted. These days, we put who knows
HINT: Leave enough volume in the final installation to replace the "electronic transformer" with a real chunk of copper and iron. Hammond makes a wonderful line of transformers. They are available fr
Also be aware of the optimizers. Again, if you go back in the archives on this site, you'll discover these are really bad RFI generators and many times worse than the inverters themselves. Dave - WØL
There are all kinds of 3-terminal linear regulators around - even for 24 and 28 volts. Most source at least 0.5 amperes. Of course, you'd have to find a transformer. Suggestion for the transformer if
QUOTE: " For what it's worth, I contacted Generac on N1UK's behalf and the gist of the conversation was that their equipment meets all FCC requirements which is the standard answer you'll get from mo
If someone on this lest knows of the FCC regulation(s) addressing the solar industry, please let us all know. To my knowledge, so far, there is nothing addressing the solar industry. ARRL, is there a
You are so correct, Kim!!! Dave - WØLEV -- *Dave - WØLEV* *Just Let Darwin Work* _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailma
There are total exemptions for anything permanently connected to the power grid (I'm not going to look that up yet again......). However, in a dedicated single-family home which does not feed back to
Jim: Yes, they have to generate RF energy when multi-amperes are rapidly switched. BUT,.......they should be constructed such that they do not RADIATE that energy. There are two sides to the RFI/EMC
I WELL understand, Jim!! I've been at this game for some 30+ years. I know the SMPS designers don't line resistances or small inductors inserted in series with the gate drive of the final switching F
IN further poking around on the FCC OET site under Generac, I can't find a single report filed on anything except wireless hardware. I could not locate any complete systems which would include the pa
Yes, ED, I'm well aware of all that. In my looking at all the reports filed with FCC, none addressed the complete system, only the intentional radiators (Zigibee, BlueTooth, or whatever). Yes, as a C
Yes, I may have jumped to conclusions too fast based on what I wanted to see. Apologies to everyone on the RFI list. I've been out of it in retirement for some 11 years and am not as sharp as I once
I suspect what you are experiencing is broadband noise from solid state transmitter PAs. During the days of vacuum tube amplifiers for commercial broadcast this was much less of a problem. However, t
I recently addressed a problem much like you describe. While transmitting CW on 40-meters, very bad 60 and 120-Hz modulated broadband signature on 20-meters, second harmonic of the transmit frequency
We tried a rather large common mode choke to little avail. It did "something" but not enough. Yes, 31 material is the preferred material, especially for 160 and 75/80 meters. 40-meters is roughly the
Ethernet noise is not totally broadband in nature. There are pockets of high BB emissions, pockets of very little noise with frequency, and then more pockets of noise as you tune around. All changes