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In Reply to: RE: What's the difference between K75-10 and K75-10B posted by twystd on May 01, 2017 at 23:28:32
Thank you for responding anyway. I've tried some 0.22uF/500V K75-10B's in my preamp and I think they are great. The midrange is really something and the musicality is excellent. If this is the sound of polyester then I'm a convert. Would have been nice to know if it was metallized foil inside. Then ALL of my preconceptions would have gone down the drain.
Follow Ups:
In the name of curiosity I've cut one 2.2uF/250V K75-10 and one 0.22uF/500V K75-10B open for investigation. Both had a little oil impregnated paper directly under the steel can. This was followed by polyester and finally metalized polyester under that again. It would be wrong to call them hybrid capacitors (like the old Sprague "Difilm" variety). The K75-10's are just metalized polyester capacitors. Plain and simple. At least mine are.
metallized paper.
I stand corrected. I checked it just now. You can rip the metalized paper very easy. Sorry for spreading misinformation.
In fact I could not figure from Russian sources where the metallization is in K75s - on polyester or on paper. Thanks to your research, we now know it is on the paper.
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