Kliche mini Zener

[Svenson007]

Hey guys. I want to build a kliche (klone) but I don’t have the 12v 1 watt Zener called for. I do have some 9.1v Zener. I believe it’s limiting the voltage reaching the charge pump. So couldn’t I just use my 9.1v? I saw on another forum that you probably can. But I trust you guys here so any help would be great.

 

[Robert]

You could use 9.1V but it'll be right on the verge of dumping current to ground if your power supply puts out a hair above 9V.

I would probably just omit it before I would substitute it with a lower voltage... just don't power it above 9V and you'll be fine.

If you want reverse polarity protection you could put a 1N4001 - 1N4007 in it's place, although I'm not particularly fond of parallel diode to ground polarity protection.

 

[Svenson007]

You could use 9.1V but it'll be right on the verge of dumping current to ground if your power supply puts out a hair above 9V.

I would probably just omit it before I would substitute it with a lower voltage... just don't power it above 9V and you'll be fine.

If you want reverse polarity protection you could put a 1N4001 - 1N4007 in it's place, although I'm not particularly fond of parallel diode to ground polarity protection.

Cool! Thanks so much. And thanks for your awesome pcbs.

 

[jesuscrisp]

Instead of the Zener I'd add a small current limiting resistor about 10-47 Ohms.

 

[Svenson007]

Instead of the Zener I'd add a small current limiting resistor about 10-47 Ohms.

Thank you

 

[Chuck D. Bones]

Instead of the Zener I'd add a small current limiting resistor about 10-47 Ohms.

How is that supposed to help?

 

[jesuscrisp]

How is that supposed to help?

Drops the input voltage just a tiny bit and forms a lowpass filter for the power noise. Probably not a huge issue with the Centaur, but in some circuits I found it makes a noticable difference in noise whether you have a CLR or not in front of the power supply. And in charge pump circuits I generally like to add one.