Snubber pics?

[Dominick22]

Does anyone have pics of a completed snubber based on the Carlosfm design located at Decibel Dungeon?

I have all the parts, but I am nervous about actually trying. Specifically, I would like to see its integration into the signal path.

Thanks,
Dominick

[Nuuk]

Oh dear!

Dominick, the snubbers are used on the caps in the power supply, not in the signal path. Anyway, here's a picture if it makes things clearer for you.

[peranders]

Dominick22, if you take for instance 100 uF in parallel with 100 nF you'll get an impedance peak and an impedance dip.

According to simulations and measurements you should _not_ have a 100 nF (or similar value) without a resistor in series, this if you really want to avoid the peaks.

Simulations:
http://www.diyaudio.com/forums/showt...197#post546197

Real world measurements:
http://www.diyaudio.com/forums/showt...002#post548002

My suggestion how it should be done and in this case noone had come with any objections. You can also snubberize both the x000 uF package but at least the very close decoupling package should be snubberized if you if some reason want to eliminate this very small impedance peak in the 0.5-2 MHz area.

http://www.diyaudio.com/forums/attac...amp=1109343379

Before you do too much you must ask yourself what the purpose is and what the goal is. If you don't know the goal it's also hard to choose the right parts and the right circuit.

This should also be considered:
http://www.diyaudio.com/forums/showt...632#post564632

See also my sig below.

[Dominick22]

Peranders,

Thanks for the posting--I will have to dive into it later.

I am building a bi-amp for me 2 main speakers. So 2 chips for highs and 2 chips for lows. I am only snuberizing the lows.

Peter Daniel was nice enough to help me out and he already put the kits together for me so the values have been selected by someone I trust. I am just so new that I am having difficulty understanding how and where to connect what!LOL

Ill post values and such later--Thanks Nuuk and Peranders!

Dominick

[Bazukaz]

Hi,
Should read this :
http://sound.westhost.com/articles/capacitors.htm

Regards,
Lukas.

[Dominick22]

OK guys,

I have:
2 1u8 Rifa

4 1.5nf

4 100nf

4 3.3nf

4 .47R

4 .1R

4 1500R (I think they are)

So my problem is-I can get the guts of the snubber put together, but where do I actually connect to the boards? Do solder directly to the chip? If so, what and where?? And then do I just end it where the 10 uf caps are now?

Thanks,
Dominick

[Peter Daniel]

I understand you are following the description that can be found on Nuuk's site.

Solder 0.1R and 3n3 in series directly between each Panasonic 1500 cap pins (that you have presently on board, do it underneath the board, snubber cap on the ground side).

Solder 1.8uF cap across PS rails as close to chip is possible, also in a bottom layer. Follow the traces from main filter caps to see which pads are connected to those rails.

Other snubber components can be added directly on rectifiers board, as there are special spots for those parts (0.47R and 1.5nF). You can also fit there 10,000uF caps, the other caps need to be connected with wires as there is not enough space on board.

1k5 resistors are soldered directly across big cap pins.

[Dominick22]

You all have ben great!

I think I can put the board together now and pretty much the rest of the network.



Any pics of snubber chip pin connections, etc.??

Thanks,
Dominick

[Upupa Epops]

How do you can solder rails outlets with soldered elyts, Peter ?

[Peter Daniel]

Can you be more specific, I can figure out what you mean.