earlofsodbury
Wastrel.
Too late to be of any use, but I've used the simple design to block DC for many years, ever since buying a buzz-tastic Cairn 4808 in about 2005. I'm still using the exact same one on my telly. It survived use in my previous home where the voltage never dropped below 250VAC and peaked at 265VAC fairly often. It's survived where I live now, which suffers from a very unstable electrical supply - regular sags, surges, cuts, even a lightning strike on a pole-mounted substation nearby. I tested it with a 3kW electric fire for several hours when I first made it - didn't even get warm, so I put a second fire on the circuit ... and the outlet on the wall started to melt and smell bad... It's robust.
People complained these blockers squash dynamics, so I used bigger caps - by far - as they are the chief limiting factor for current. I started with 33,000 uF / 15VDC and later 100,000uF / 35VDC bypassed with X or Y-class films for added peace of mind. Wholly over-the-top, but there ya go.
Whether or not transformers are buzzing, I find the subjective effect on SQ is always positive.
I've read a lot over the years about theoretical problems with them, just never encountered those problems in the real world. I understand why the more complicated versions exist, and if I was building to sell to other people, and needed a CE rating, I'd probably do things differently. Otherwise, simple is good, so long as you don't skimp on parts.
People complained these blockers squash dynamics, so I used bigger caps - by far - as they are the chief limiting factor for current. I started with 33,000 uF / 15VDC and later 100,000uF / 35VDC bypassed with X or Y-class films for added peace of mind. Wholly over-the-top, but there ya go.
Whether or not transformers are buzzing, I find the subjective effect on SQ is always positive.
I've read a lot over the years about theoretical problems with them, just never encountered those problems in the real world. I understand why the more complicated versions exist, and if I was building to sell to other people, and needed a CE rating, I'd probably do things differently. Otherwise, simple is good, so long as you don't skimp on parts.