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In Reply to: RE: New Hum from phono section (Project Phono Box MKII) posted by Blackdog on November 08, 2015 at 10:37:22
Damn, I'll say. No wonder they bloated up. I generally prefer a 10 to 20% below spec margin, given voltage spikes at start up. I'm planning to change the old caps in a Marantz tuner I have. The first cap is rated at 50 V, and sees about 45 volts after warm-up. I'm going to up it to a 63 V cap, for the very reason you mentioned.
To get this back on the topic of phono (while still thread stealing. Sorry bewareofdoug) do you subscribe to electrolytics in the power supply having a "sound"? I need to re-cap a phono stage power supply. The objectivist in me is looking at low ESR, high ripple handling caps, specifically the Nichicon HE type.
The subjectivist in me is considering Elna Silmic II caps, which, while more difficult to fit, are recommended by the likes of Nelson Pass, among others, for their sound quality (although Pass didn't specify the power supply specifically).
Curious what you think about this.
"You won't come back from Fletcher-Munson curve"-Jan and Dean
Follow Ups:
I prefer to use the lowest ESR I can get on any given cap. Generally for two reasons. I find they sound better, and they also tend to last longer.
9 out 10 times the best are Panasonic or Nichicon
Dan Santoni
I suppose the only way I'll know if the low ESR Nichicon HE sound better than the RFS "magic silk" Elna is to try them for myself.
But I'll agree with you in advance regarding the "last longer" part. The Elnas in the values I need are rated at 1000 hours, the Nichicon HE @ 10,000 hours.
I've generally used Panasonic FM or FC in the past, but after reading the post linked below, I thought I'd try the Nichicon HE. The poster claims they measure better than the Panasonics. Or they did twelve years ago, anyway!
Thanks for your reply. Much appreciated!
"You won't come back from Fletcher-Munson curve"-Jan and Dean
Part of what he said there is true. The HE do have really low ESR. The part about FC's not meeting spec is bull. I've been using Panasonic for over 20 years and they generally measure much better than spec.
Blackgates on the other hand were some of the worst spec'd caps I've ever seen. The failure rate was pretty high too.
Dan Santoni
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