Such preference as pictured on schematic leads to higher distortions and earlier death of the capacitor that is connected in reverse polarity. Also, another capacitor sees more than 25 volt and can die quite quickly damaging headphones and possibly ears. If it is your preference to have damaged headphones and ears, good luck, but be aware of lawyers if you sell such amps to somebody.
Wavebourn, the maximum voltage drop over the two capacitors is 36Volts.
That is 18V for one capacitor. Distorsion values are lower as using one elco.
Manifactures as Shanling, Burmester and MCintosh uses the two serie elcos a long time in they equipment.
But every one is free to use elcos with higher voltages. The PCB can be used with one output capacitor, two output capacitors in serie, two output capacitors paralell and two output capacitors in serie with one paralell.
And i will sell nothing, this is a DIY forum.
Ronny
That is 18V for one capacitor. Distorsion values are lower as using one elco.
Manifactures as Shanling, Burmester and MCintosh uses the two serie elcos a long time in they equipment.
But every one is free to use elcos with higher voltages. The PCB can be used with one output capacitor, two output capacitors in serie, two output capacitors paralell and two output capacitors in serie with one paralell.
And i will sell nothing, this is a DIY forum.
Ronny
If Shanling, Burmester and MCintosh used electrolytics in reverse polarity like you they would not survive at all.
It was my last warning, I am not going to try to explain you anymore that as drawn on schematic capacitors are reverse biased. If you still don't understand what that means I assume it is forever.
It was my last warning, I am not going to try to explain you anymore that as drawn on schematic capacitors are reverse biased. If you still don't understand what that means I assume it is forever.
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Ronny it's not about the voltage over the capacitors or using one instead of two but that one of them is connected in reverse.
BTW the etching of the print failed today because the etch fluid was too diluted.
They didn't have enough etchant so they put some water in to dilute it further but it was too weak.
So I got some more etchant and will try again tomorrow.
BTW the etching of the print failed today because the etch fluid was too diluted.
They didn't have enough etchant so they put some water in to dilute it further but it was too weak.So I got some more etchant and will try again tomorrow.
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Oke Guys, this is not rocketscience just elementairy physics.
When you connect two of the same polair condensors in serie( with same polarity connected) they act as one non(bi)polair condensator with double voltage and half the capacity.
See also here:
http://www.diyaudio.com/forums/parts/14493-how-make-bipolar-caps.html
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If you have two equal capacitors in serial in a DC-circuit the total DC-voltage will divide equal over each capacitor. If one cap is in reverse polarity, the standing DC-voltage over this cap will also be in reverse.
Also, the cap that is reverse biased will have more leakage and die faster, then another cap will see more voltage and die as well.
It is acceptable to make non-polar cap such a way if it has no DC bias, but when DC biased it is wrong and dangerous.
Edit: when connected as "non-polar" caps as a filter in crossover, with zero DC, due to chemistry when they work on AC each cap charges another acting like a diode, so they don't see much of reverse polarity voltage. It is totally different situation. Please be careful when you copy and paste something from one schematic to another.
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Now you have possible a point regarding the DC voltage.
But my experience with this kind of output decoppling in the last 40 years is that never a condensor is gone defect, but there is always a first time.
Maybe i do not have any problems because i use always a parallel capacitor on the two serie capacitors.
Output buffers of all cd players of a welknown brand.
But my experience with this kind of output decoppling in the last 40 years is that never a condensor is gone defect, but there is always a first time.
Maybe i do not have any problems because i use always a parallel capacitor on the two serie capacitors.
Output buffers of all cd players of a welknown brand.
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It is sad to read that fellow diyers sometimes don't learn during 40 years, except how to copy designs of others' including typos and mistakes.
What experience do you have with blown series output capacitors. Please share your experiences with us. And discribe the circumstances in with it occurs in detail. I am never to old to learn.
The most DIY are copying schematics, only a view are combining original ideas with proven schematics. And there are less who invent new schematics.
For the last decades i tryout a lot of schematics and ideas. And combine the things i personal like.
The above mistake as you reffered to, is the best sounding CD player i have heard until yet.
The most DIY are copying schematics, only a view are combining original ideas with proven schematics. And there are less who invent new schematics.
For the last decades i tryout a lot of schematics and ideas. And combine the things i personal like.
The above mistake as you reffered to, is the best sounding CD player i have heard until yet.
An externally hosted image should be here but it was not working when we last tested it.
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Dear Ronny;
I warned you already, and explained several times. Now it's up to you, either to accept the truth and start learning, or to continue to copy stubbornly everything including mistakes from designs you like. When you combine parts of designs you like you may add more mistakes, some of which are dangerous, like in your headphone amp where dead capacitor damages headphones.
Sincerely,
Anatoliy
I warned you already, and explained several times. Now it's up to you, either to accept the truth and start learning, or to continue to copy stubbornly everything including mistakes from designs you like. When you combine parts of designs you like you may add more mistakes, some of which are dangerous, like in your headphone amp where dead capacitor damages headphones.
Sincerely,
Anatoliy
It is right, that's why I would strongly advise to correct the error on the drawing moving + signs to the positive side of each capacitor.
No, it does not. The amp has positive voltage on cathodes in respect to ground. Yes, you can use film cap on the output.
Bipolar electrolytics are used when there is no DC bias, but high capacitance is needed. They are smaller and cheaper than film capacitors.
I have changed the schematic and PCB design regarding the output capacitor.
Neverless is it possible the build different outputcapacitor setups like below.
I do not tell with is sounding best. You must try for yourself.
Neverless is it possible the build different outputcapacitor setups like below.
An externally hosted image should be here but it was not working when we last tested it.
I do not tell with is sounding best. You must try for yourself.
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