Pro Audio Design Forum

Tantalums are pretty well against my religion... I got tired of trying to figure out how to keep them happy in high current ripple applications. Though I hear the tantalum polymers are quite a bit more tolerant high ripple current...the little beasts are way to rich for my blood. Then there is the p...

Zetex has their own spice models for many of their parts and they seem pretty decent. What fun it is to sit around and do some transistor noise drag racing in my favorite low noise design simulations!! :lol: So far my favorites are ZTX1051A - NPN ZTX1147A - PNP Just a tiny tad of a smidge quieter th...

Trying to get the models perfect in the simulations is a big topic of discussion where I work, ie power conversion, not audio. Though even the grizzled old engineers, aware of the effect, haven't made much of a fuss about it. When I've noticed the effect in the lab, hv dc power supply filter caps, t...

It's interesting many are calling it "battery action". I'm surprised some of the bigger manufacturers, of cap types where DA is more pronounced, haven't written more about the mechanisms involved. It would be nice to be able to model it better.

Very much obliged for everyone's opinions. I already upgraded to the STP input lines! I meditate on this forums posts when I have free time. I would note that C1/C2 are indeed some nice, high quality film caps. I will be taking the advice given here. No way! Your build looks like you're pretty exper...

Not sure I understand your question, but I would be tempted to put the input caps inside (after) the inductors. Perhaps a single cap outside from + to -. If this is a phono input don't over do the C loading. Thanks for your tips. And I emphasize an apology for my poor communications skills. My main...

https://www.miedemageluid.nl/images/web/RFI-protection-concept-v5.jpg https://www.miedemageluid.nl/images/web/RFI-protection-concept-v5-M.jpg Here are the diagrams. These are the things that keep me up at night. Sorry if I repeat myself. I keep changing my mind about whether L2 belongs on the input...

Hi. Please pardon if bumping an old thread is frowned upon. I found this thread while googling for emi approaches. Gertjans diagrams on page 2 seems very good. I will be redoing a couple things on my recent phono board kit build to bring it more in line with the diagram. First question. Proper locat...

I think you may be reading my mind.

I think your point about how the signal is more susceptible to picking up common mode noise down at the cart is a great one. In what's hopefully a relatively quiet enclosure when the conversion to single ended is done up at the riaa eq switcher pcb, there is far less ability for the signal to pick u...