For the capacitor, I have both 0.1uF in ceramic and polypro. Can I use either of them? If yes, which one is preferrable?
Thanks in advance.
Thanks in advance.
R should be low inductance and reasonable power rating, several watts minimum.
C should be low inductance, low ESR, and low loss, like pp film.
C should be low inductance, low ESR, and low loss, like pp film.
Metal oxide & polyester film. As for resistor power rating, 2W is common choice.
Use Wima FKP polypropylene ( it’s a foil capacitor and handles higher currents better). Metal oxide 2 Watt resistor should be fine
Why X2 when 63-100V rated metalized PP or general purpose polyester fim serve the purpose? Rayma may explain better.
You could use literally any film capacitor 0.1 uf/63V+ is going to fit on your board. Even ceramic X7R works there.
MKT is fine, i also used Epcos 0.1uf 100V blue MKT capacitors. My amp is stable and no problem so far. But what you going to use for output inductor+ resistor network?
If the amp is ever tested at full power, or bursts into HF oscillation, I'd want a low loss film capacitor
there, a foil type if possible. If it's also X or Y is not so important. PP is better than polyester types.
But size it for several watts at least.
For the RL, use a low inductance 10W resistor. Sometimes the L is wound right on the R.
there, a foil type if possible. If it's also X or Y is not so important. PP is better than polyester types.
But size it for several watts at least.
For the RL, use a low inductance 10W resistor. Sometimes the L is wound right on the R.
I used a small 1.5R 2watt fusable metal film resistor with 1uH inductor. I think it's not much critical for day to day use.
I've used X7R ceramic for the Zobel capacitor. That works just fine. I've never been able to tell any difference between film and X7R in that application. If you're truly neurotic about it, you can always get an NP0/C0G capacitor. They'll outperform film on many parameters.
Tom
Tom