Hi
Looking for caps for a preamp and a few power amps.
1Uf-10nf range.
Wich types are you using ? MKP,MKT,folie....???
Jan
Looking for caps for a preamp and a few power amps.
1Uf-10nf range.
Wich types are you using ? MKP,MKT,folie....???
Jan
That's going to depend on what they're being used for in a circuit and what the circuit looks like.
If anyone tells you that there's a "best" cap without respect to application, you know you're dealing with someone who has no clue.
If anyone tells you that there's a "best" cap without respect to application, you know you're dealing with someone who has no clue.
Hi
Amps:The ACA,PLH here and this Class-A power amplifier project | Current-Drive - The Natural Way of Loudspeaker Operation
Got the caps for the ACA
Preamp:havent decided yet.
Jan
Amps:The ACA,PLH here and this Class-A power amplifier project | Current-Drive - The Natural Way of Loudspeaker Operation
Got the caps for the ACA
Preamp:havent decided yet.
Jan
Each cap needs to be chosen for its particular role in the circuit, as SY said. By 'chosen' I primarily mean technology (e.g. dielectric), not brand. The circuit designer may have a view on this - after all, he should know exactly what each cap is doing.
As a general rule, decoupling caps should be physically small so they don't have too much inductance. A decoupler operating on its own may need lowish ESR (e.g. plastic film) while one paralleling a larger one may need higher ESR (e.g. high-K ceramic).
Coupling or feedback caps setting bandwidth need to be linear. For others it may be less important. Physically big caps may pick up more noise and interference, or create unwanted capacitive feedback leading to instability.
As a general rule, decoupling caps should be physically small so they don't have too much inductance. A decoupler operating on its own may need lowish ESR (e.g. plastic film) while one paralleling a larger one may need higher ESR (e.g. high-K ceramic).
Coupling or feedback caps setting bandwidth need to be linear. For others it may be less important. Physically big caps may pick up more noise and interference, or create unwanted capacitive feedback leading to instability.
Hi
Refrasing:
Okay,Which type of caps would YOU use for the PLH or this:Class-A power amplifier project | Current-Drive - The Natural Way of Loudspeaker Operation
The Ellyts are Obvious.
Im to old to take the extended exsam in caps.
And for some reason,the type of caps is (almost) never on the scematic or in the partslist,just the value.
Jan
Refrasing:
Okay,Which type of caps would YOU use for the PLH or this:Class-A power amplifier project | Current-Drive - The Natural Way of Loudspeaker Operation
The Ellyts are Obvious.
Im to old to take the extended exsam in caps.
And for some reason,the type of caps is (almost) never on the scematic or in the partslist,just the value.
Jan
I would never consider a current-drive circuit, as very few loudspeakers have enough mechanical damping to avoid a bad bass resonance peak. Getting the right circuit is much more important than component selection.
Hi
Im building the ACA,the PLH,the Current mode and refurbishing my old JLH
Just tought I could learn something from the "experts" around caps! ?
DF96 :Project CS-8 | Current-Drive - The Natural Way of Loudspeaker Operation
Jan
Im building the ACA,the PLH,the Current mode and refurbishing my old JLH
Just tought I could learn something from the "experts" around caps! ?
DF96 :Project CS-8 | Current-Drive - The Natural Way of Loudspeaker Operation
Jan
Current drive is so 'natural' that extra LC components are needed in the speaker to remove the bass resonance peak. The result is a speaker which cannot be used with a conventional voltage drive amp. Not my cup of tea, but each to his own.
Hi
Okay,Which type of caps are best for any amp,input signal caps specially ?
Jan
BTW: I prefer coffe 🙂
Okay,Which type of caps are best for any amp,input signal caps specially ?
Jan
BTW: I prefer coffe 🙂
Does the input cap set the LF rolloff? If so, you want a linear dielectric so best to avoid polyester/mylar. If not, almost any film cap will do. In either case, avoid physically large caps as these can pick up hum/noise.
As I hope you are beginning to realise, there is no such thing as 'best' cap even given the circuit position because position does not contain the full story.
As I hope you are beginning to realise, there is no such thing as 'best' cap even given the circuit position because position does not contain the full story.
- Status
- Not open for further replies.