bipolars can be used in speaker crossovers, so.......
(which ofcourse can be debated, but please don't
)well, it was just a thought
electronics is your field, not mine
--The theme is very large and can not find it to others I am not good at English--: 
,merry Christmas,
Last edited:
Ah ok - different behavior in that position.
I didn't try snubberizing FB yet - will do that next year.
I think that, when the purpose is decoupling rails near the devices, tantalum caps give the best.
Salas, you have a PM.
If i would suggest anything.
The Panasonic caps FC-series are at the topend. But all electrolytic capacitors has a resonance point a lot lower than film or ceramic types.
ESL is the one that give ringing together with a capacitance.
The ripple current and impedance is given at 100KHz.You could add a series resistor to the Panasonic FC, but i would never do it to the MKP's.
This series resistance could be in the range of 1 - 10Ohm.
But it is a matter of taste. And i have done everything to keep pcb trace inductance at a minimum.
- Sonny
I totally agree, but it is difficult to get high voltage low ESR, low ESL tantalium caps.
Well, it can be true, all is a matter of what you are looking for. I mean where you need to minimal the impedance. In a feedback loop, we are often using the cap with an added serial resistance. Easy to // the same resistance + the MKP, for a near perfectly damped circuit. Right ?
About Tantalum, they are not so bad for signal too, as long as they are polarized with enough voltage margin. More fluid than Aluminum, on my feelings.
They are best in the long time, since very fragile on the short one. We had encounter a lot of failures in the first month in a mixing desk. Short circuit, most of the time. Once they are burned out they are ok on the long distance.
Caps are often a real nightmare.
They are best in the long time, since very fragile on the short one. We had encounter a lot of failures in the first month in a mixing desk. Short circuit, most of the time. Once they are burned out they are ok on the long distance.
Caps are often a real nightmare.
Adding the resistance to the electrolytic is something I have tried in spice but not in reality - I'll try that also next year
I'm somewhat curious what you don't like about the sound of snubber R in series with bypass MKP cap - I only ever do this these days with constantan wire which sounds just fine to me - but I know that we all have different preference & priorities with the "sound" we like.
My ultimate solution is several snubbered bypass caps added to the electrolytics - this way impedance is kept quite low & the film caps smooth & clean "character" dominates the sound without any added resonance.
sounds almost like a 'FC forever'
I would start looking at new FR-series
http://docs-europe.electrocomponents.com/webdocs/0e4e/0900766b80e4e9bf.pdf
they seem to have the best specs right now
longlife 105degr with high ripple and low ESR
but they may have one serious problem, they are not so great looking
