urm, where did you get this schematic? This isn't RC supply.

If RC, the R must be in series to get a "low pass effect". This way it just adds inductance and ESR to your capacitor.

Snubber bukan liek dis oneee.


In your case, you should read up on CRC supplies. The way it works is to have a small amount of V drop before it hits the capacitor. Which in your case, if V+ is taken in between the R and C instead would form the correct RC supply.


Now CRC is a tricky thing in terms of management. You'll need to know what currents you're pulling.

Better to tell us what you're driving with it.

malas mode 100%. later if I'm rajin again i'll post some calculations.

For passive filters, you'll have to know what levels of ripple is acceptable as well.What is your target ripple and bandwidth?

Chances are, the op-amps are oscillating. You'll need to stabilize them. IMO properly done, op-amp makes very little difference from each other.

http://sound.westhost.com/power-supplies.htm

You can try this link. It has good basic info.

Basically, you have to find what bandwidth you're targetting. For audio supplies, I would target somewhere around 20-30kHz. This is passive supply so ripple will be higher. Ultimately you have to find out what level of "distortion" is acceptable. I'll post some spoon feeding calculations if you're still confused after work if you're interested.

To get an oscilloscope, our lab at MMU has a TDS1001B IIRC. You can use it to troubleshoot your op-amp oscillations. Try to inject a 100kHz square wave at the input and check the output. Make sure the square wave looks good with little "overshoot".

Greetings fellow nerds/bastards,

I will be buying The Wire Boards (google "the wire amp diyaudio") from opc soon (just added my name) anyone who wants to share shipping and purchase as well lemme know.


These are some of the best designs on the planet. Pretty much designed for the least distortion and highest performance. You can't get anything better than this for now.

you have a pot in front already.

Just get a stepped attenuator for the upgrade (passive pre-amp, although the word "amp" is pointless in this context)

Save the money you'd spend on preamp for upgrades later.

http://item.taobao.com/item.htm?spm=a1z09....&_u=n580smne2d5

This is a pretty good buy.

I use the DACT CT-2 for my speaker amp

take pics of your build, and list down the components you used.

Take close up shots, the top and bottom.

I need to see how the work looks like.

LI-ION is explosive.

Not recommended for those with little to no experience in electronics.