Rod Elliott provided very convenient design that uses one standard square rectifier bridge, so it is easy to implement without need for PCB.
It is important to use capacitors large enough that peak primary AC current will not develop, over impedance of two capacitors in series, voltage equal or greater than 0,65 V per diode in series. That is first requirement. Then, depending on how much DC voltage (two mains voltage halfwaves difference or asymmetry) can appear, it may be required more diodes than two. Really varies by network condition.
It is important to use capacitors large enough that peak primary AC current will not develop, over impedance of two capacitors in series, voltage equal or greater than 0,65 V per diode in series. That is first requirement. Then, depending on how much DC voltage (two mains voltage halfwaves difference or asymmetry) can appear, it may be required more diodes than two. Really varies by network condition.
The story about the DC blocker was good, now it is much clearer to me what I should do. Just to get a bunch of very low ESR capacitors.
Mark4w wrote,
“I know. I can hear that too. But since we don't trust non-DBT hearing reports, I'm afraid you will have to show DBT. (not really, but let's just say I don't trust you so I call you out to produce "proof." Will you do it on my demand?)”
I realize it’s in vogue to challenge or threaten any claim with, “I bet it can’t pass a properly designed and controlled DBT,” but I’m afraid I have some bad news. A single controlled DBT that has negative or inconclusive results has no meaning. Even a DBT with positive results isn’t 100% proof. Not to mention negative results are what the challenger expects. Does that surprise you?
“I know. I can hear that too. But since we don't trust non-DBT hearing reports, I'm afraid you will have to show DBT. (not really, but let's just say I don't trust you so I call you out to produce "proof." Will you do it on my demand?)”
I realize it’s in vogue to challenge or threaten any claim with, “I bet it can’t pass a properly designed and controlled DBT,” but I’m afraid I have some bad news. A single controlled DBT that has negative or inconclusive results has no meaning. Even a DBT with positive results isn’t 100% proof. Not to mention negative results are what the challenger expects. Does that surprise you?