Audio Sonic ST-500 integrated

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sakis said:
YEAP ,,,, i could go for 10.000 in the power supply but with caution that might require also bigger diodes and at least 4700 in the outputs with a bypass of lets say 2.2ufd in the main cap and at least 1.0ufd for the outputs

kind regards
Sakis
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Hi Sakis,
Thanks for the imput. 🙂

Now, pushing a bit further on power supply capacitance: I have read that the use of 1uF or 2uF bypass caps. With newer power electrolytics are these bypass caps really necessary?

Leestereo said:
The purpose of a film bypass (parallel cap) is to lower the impedance of the large electrolytic cap at high frequencies. When the practice of using film cap bypasses for large electrolytic caps was initially introduced in the late 70s/early 80s, the then current electrolytic capacitors had increasing ESR with increasing frequency and the film cap compensated for this. But with modern low ESR capacitors, this is no longer necessary since these have low impedance out to 100kHz. In fact, a small film capacitor in parallel with an electrolytic capacitor NOT having high ESR will actually result in higher overall output impedance and ringing. Here is a link to a technical discussion of same: http://www.diyaudio.com/forums/power-supplies/126697-bypassing-psu-capacitors-effective-2.html Many hobbyists still use film bypasses, but I do not think that they are needed when a good low ESR cap is used. I believe that this is a case of "less is more" for better sound, of course YMMV.
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In other words, modern big power caps wouldn't need bypass anymore?

Starting discussion was here at DIY Audio: http://www.diyaudio.com/forums/power-supplies/126697-bypassing-psu-capacitors-effective.html
 
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