I'm just an enthusiast but some very good restorers (and myself by imitation) use them.Is NPO/COG ceramic caps have as low distortion as the film caps?
I was wondering if getting values 425 pF + 425 pF would have an advantage over 800 pF + 50 pF. I am leaning toward one polypropylene film cap.
Dude: http://audiokarma.org/forums/index.php?threads/does-mouser-sell-disk-caps.802391/#post-11151873BinaryMike first time I have heard of COG ceramic.
Very interesting result. This is particularly good as Bateman actually design capacitors. I used to think about voltage coef. only, but he added the loss tangent. Looks like the COG/NPO are almost as good as the best of film caps. ( about 3db different when measuring at -126dB!!!) That's more than an order lower than the lowest distortion amp can do.I'm just an enthusiast but some very good restorers (and myself by imitation) use them.
http://www.conradhoffman.com/cap_measurements_100606.html
https://linearaudio.nl/cyril-batemans-capacitor-sound-articles
Very interesting result. This is particularly good as Bateman actually design capacitors. I used to think about voltage coef. only, but he added the loss tangent. Looks like the COG/NPO are almost as good as the best of film caps. ( about 3db different when measuring at -126dB!!!) That's more than an order lower than the lowest distortion amp can do.
Don't use ceramics in audio circuits. I tried it once as experimental output coupling caps and they sounded terrible. Harsh and spitty treble. Use polystyrene.Is NPO/COG ceramic caps good enough? That would be really easy.
Also, if OP willing to go SMD, you can have a much wider selection.
You use it for output? What value you use? Are you using COG/NPO? Output coupling cap usually needs higher value above 1uF. I can't find any COG/NPO this value.Don't use ceramics in audio circuits. I tried it once as experimental output coupling caps and they sounded terrible. Harsh and spitty treble. Use polystyrene.
They go until 0.47 or 1uf i think ... polystyrene are similar in values but if you look at them with a solder on your hand they drift in value, they are very heat sensitive.I can't find any COG/NPO this value.
Please read the orig. thread again. He's referring to a feedback cap. Low voltage.You use it for output? What value you use? Are you using COG/NPO? Output coupling cap usually needs higher value above 1uF. I can't find any COG/NPO this value.
Polystyrene are excellent audio caps. Yes, they are heat sensitive during installation, but I have been using them for years and haven't damaged any with the iron yet. Just be careful.They go until 0.47 or 1uf i think ... polystyrene are similar in values but if you look at them with a solder on your hand they drift in value, they are very heat sensitive.
So all in all, as you well know it, depends on the application
Please read the orig. thread again. He's referring to a feedback cap. Low voltage.
Don't use ceramics in audio circuits. I tried it once as experimental output coupling caps and they sounded terrible. Harsh and spitty treble. Use polystyrene.