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
Phantom Power ( Power Over Ethernet "POE" ) So I had a suggestion to replace the power supply and feed with 12V. Opening up the unit, it looks well built and shielded. However the power supply appear
Would alerting Underwriters Laboratories "UL" have any value? I do know that Paul Cianciolo has worked with a few hams on this issue. I am not sure if he made any headway on it with Samsung, but I wi
QSL on everything. Also, put a "common mode choke" in that feedline - may two chokes, one at the entrance to your house and another out at the antenna. Do all three actions, look over Jim's papers, g
For below 160m (472 KHz & 136 KHz), you need Mix-75 toroids or similar. Also, if you saw "a few dB" improvement in noise with the choke at the antenna - every dB counts, so put a second choke out the
I saw a news report that the US does not have nearly enough generating capacity to charge all the forthcoming electric vehicles. So we will have to ration the electricity for charging the batteries i
Hello Mike, I use the METAL CASE Tripp-Lite "Isobar Ultra" Diagnostic Surge Suppressor on my ham AC power and on my entertainment system AC power. It has a fair amount of filtering along with the sur
Have you ever been next to a person with a hearing aid then used your digital 800 MHz cellphone? I did this and the guy with the hearing aid just about jumped out of his skin from the shrill buzz my
I guess they didn't have a capacitor tester on their bench. Maybe they didn't even have a bench, or spare parts, or a real engineer - just a "board swapper". I was in AM, FM and TV engineering for 50
When making your own analog power supply for LED lighting, remember that the LEDs need Regulated Current ( not regulated voltage ). You can use a regulated voltage, but you must include a current lim
We had a full-power 50 KW Channel 3 VHF TV station here in Madison WI since the 1950s. The transmitter was an all-tube RCA TT-50, worked well, reliable, and spectrally very clean. Then about 30 years