I want to know if an Epcos B41560 or B41580 can be a Filter capacitor? Their ripple current reaches up to 45 A. It attract me very much!
Jon, could you add a few details as to why the Epcos caps are 'hard on transformers'? Or is it just these particular 41560/80 types?
Linear power supply，Audio Frequency. A usual capacitor has ONLY more or less 10 A current
Linear power supply. Audio Frequency. A usual capacitor has ONLY about 10 A current, but theirs is much more
The ripple current rating just tells you how much ripple before the cap explodes. It says almost nothing about how well it will act as a reservoir or smoothing cap. You could try designing a PSU, rather than invoking magic numbers.
I believe Epcos. But I don't know the application fields of B41560 or B41580 capacitor. I am ready to buy parts, the choice is Badgering me.
Transformer + bridge rectifier + capacitor gives you the transformed and filtered output from the mains.
You start with the voltage your circuit requires and the power the circuit draws during quiescent, during normal reproduction and during the worst case extreme reproduction.
You start with the voltage your circuit requires and the power the circuit draws during quiescent, during normal reproduction and during the worst case extreme reproduction.
Well sds, I have used the earlier versions of these for years (B41550/70 - the Sikorels)) and have had excellent results in a wide variety of amp power supplies (usually a C-R-C version) and I'm a bit puzzled as to Jon Snells comments about them causing transformer problems - perhaps you might send him an email to ask what it's all about - it would be good to know
With the B41570's, I just cut the studs on the bottom off as they were a PIA to insulate - would imagine the same thing with the '80s - perhaps they're cheaper?
With the B41570's, I just cut the studs on the bottom off as they were a PIA to insulate - would imagine the same thing with the '80s - perhaps they're cheaper?
Yes，I agree with you. It says almost nothing about how well it will act as a reservoir or smoothing cap. But powerful ripple current can provide enough power for the machine. I can‘t refuse it at all.
Read my post again. The ripple current rating for a cap is not like the capacitance value. It tells you what the cap can do, not what it will do.sdskwm said:
If your circuit has ripple current of 5A then there is no difference between using a cap with 10A or 45A ripple current rating. You will get 5A ripple current.
If your circuit has ripple current of 20A then there is no difference between using a cap with 10A or 45A ripple current rating. You will get 20A ripple current. Slight snag: after a few minutes the 10A rated cap will explode.
And in what environment where the other capacitors tested?
My PEH169MT5220Q from Kemet have a maximum ripple current 'only' 17,7 amps. But that's at 105° 100hz. At 40 they can withstand a lot more.
Still no sound quality criterium.
My PEH169MT5220Q from Kemet have a maximum ripple current 'only' 17,7 amps. But that's at 105° 100hz. At 40 they can withstand a lot more.
Still no sound quality criterium.
With all the 'big' caps mentioned, there's not much problems about overloading them - Epcos B41***, Rifa peh169, and those other Kemet ones like BHC, Aero, etc
There is quite a difference in the 'sound' of these caps in the power supply however, and this also varies with different types of amplifiers (ie, classA, AB, D, etc) because of the amp's design, and so on
I don't know if you're aware of the different jobs that the first and second caps do in a basic C-R-C supply - the first cap after the diodes takes the brunt of the severe large current pulses every 1/100sec (or 1/120sec!) and it's ability to handle this with equanimity generally determines how smooth/rough the whole power supply will sound [this first one is often called the charge cap, or ripple cap for obvious reasons] - the second cap is the supply cap and it's job is to supply current to the active circuit on demand (a bit simplistic, I know, but you get the idea?) so it's job is quite different to the first one and this is why some amps have quite different types of caps in the power supply.
Perhaps you might add some details of the amp you are building ....
I'm sure Andrew can add more technical details on this capacitor/supply subject
There is quite a difference in the 'sound' of these caps in the power supply however, and this also varies with different types of amplifiers (ie, classA, AB, D, etc) because of the amp's design, and so on
I don't know if you're aware of the different jobs that the first and second caps do in a basic C-R-C supply - the first cap after the diodes takes the brunt of the severe large current pulses every 1/100sec (or 1/120sec!) and it's ability to handle this with equanimity generally determines how smooth/rough the whole power supply will sound [this first one is often called the charge cap, or ripple cap for obvious reasons] - the second cap is the supply cap and it's job is to supply current to the active circuit on demand (a bit simplistic, I know, but you get the idea?) so it's job is quite different to the first one and this is why some amps have quite different types of caps in the power supply.
Perhaps you might add some details of the amp you are building ....
I'm sure Andrew can add more technical details on this capacitor/supply subject
I don't beleive a well assembled amplifier shows up differences in sound by changing between good commercial smoothing capacitors and superduper audiofool smoothing capacitors.
It has taken me a long time to "discover" with the help of this Forum that supply rail decoupling is what really matters.
When local decoupling is done correctly and thoroughly, the smoothing caps never get exposed to impulse loadings.
They simply recharge the local decoupling. Which at the far end of many tens or hundreds of milli-metres of cabling, can never see the fast impulses.
It has taken me a long time to "discover" with the help of this Forum that supply rail decoupling is what really matters.
When local decoupling is done correctly and thoroughly, the smoothing caps never get exposed to impulse loadings.
They simply recharge the local decoupling. Which at the far end of many tens or hundreds of milli-metres of cabling, can never see the fast impulses.
I am building a transistor machine with super A bias. I will use them as the first cap. As the brands you pointed，I plan to choose from them，except Rifa peh169，because I have no way to get them. I like smooth and rhythmical sound，and full of momentum if needed. Do you think which is better between Epcos and BHC？
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