Sadly, the qrznow article covered everything except what is really interesting: the mode by which the seemingly incandescent "vintage" bulbs radiated RFI. 73 Rob K5UJ Vintage light bulbs were the ult
On the Ofcom website there is a picture of the spectrum analyzer and an expanded image of the bulb (240V 60W) if one choose to open the picture in a new browser tab. https://www.ofcom.org.uk/about-of
"Vintage" A modern bulb made to look vintage or "steampunk" may not have been Incandescent. Probably a "steampunk led bulb". Mike73, AD6AA 73 Rob K5UJ Vintage light bulbs were the ultimate cause of
One may, if interested, check the OFCOM website link I posted earlier and note that picture posted is indeed an incandescent bulb. I still have questions related to how the device produced EMI in the
No wonder OFCOM had no further info or speculation; They were dumbfounded by the phenom. Maybe this is why (in part) modern bulbs above 25W have been Argon filled (as well as using a compact, coiled
I've recently discovered a new type of "Antique String Filament" LED bulbs in the local stores, the internal string of many LEDs are coated with yellow/orange phosphor to give off that "antique warm
Wondering why these bulbs are an issue now, when I made several posts regarding them, going back roughly a decade when they began to flood the market, with extreme RFI noted in the VHF airband (where
Stimulus generalization; the LED types aren't the ones (bulbs) that gave OFCOM the problem. You're going to be figuratively shocked when you finally realize its really a tungsten filament lamp (with
The answer, Lloyd, appears to be definitively "no". I think the phenom had the OFCOM boys stumped. The link by Ed Hare lead to more links that shed light on the physics (but, you will have to get you
Thanks Ed and others. Looks like a problem for VHF hams. https://www.amazon.com/CTKcom-Nostalgic-Tungsten-Incandescent-Industrial/dp/B06XDBDTGN/ref=sr_1_19?qid=1585791373&refinements=p_n_feature_thre
Fortunately, those are not the lamp style the German researchers found troublesome. An up and down filament does not compare to the many up and down filament of the bulbs that interfered. Also, a key
"Guess you are not on an airway frequented by commercial aircraft, as that is who was complaining in Scotland. Besides, you're just a ham, what do you know about it? (from the point of view of offici