RussellHltn wrote:Speaking of 1U black modulators, I've seen two different brands used. On the last renovation, they installed something like a "Pico" brand. Of the 6 we had, all but one died with a bad hum in the audio. They've since been replaced with (I think) Blonder-Tongue. If I'm not mistaken, Blonder-Tongue is one of the "big boys" in the CATV business so hopefully they will hold up.
I posted that 5 years ago. Now I've had my first Blonder-Tongue fail with the same problem - a loud hum in the audio and a "hum bar" in the video. Poping the cover I see the main filter cap is bulging. Kinda unusual for a 60Hz non-switching power supply. I may decide to fix it myself. See if I can find a higher quality part.