NewYorkDave
Well-known member
The last digit indicates # of zeros, so you're low by a factor of ten. The values are 820pF and 3300pF.
ceramic cap codes
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matta
Well-known member
Hey Butta,
I've just uploaded the Avnet Ceramic Caps Guide to my site, a great resource for cross referencing caps and working out their value.
DOWNLOAD IT HERE
Cheers
Matt
I've just uploaded the Avnet Ceramic Caps Guide to my site, a great resource for cross referencing caps and working out their value.
DOWNLOAD IT HERE
Cheers
Matt
[quote author="buttachunk"]sorry for the question;
just found a commercial RIAA filter with some ceramics caps marked 821 and 332. this should cross to 82pf and 330pf ? could the codes mean anything else ?[/quote]
Ouch... ceramic cap RIAA.... get thee something with "poly" in the name....
Merry merry...
JR
just found a commercial RIAA filter with some ceramics caps marked 821 and 332. this should cross to 82pf and 330pf ? could the codes mean anything else ?[/quote]
Ouch... ceramic cap RIAA.... get thee something with "poly" in the name....
Merry merry...
JR
jdbakker
Well-known member
[quote author="JohnRoberts"]Ouch... ceramic cap RIAA.... get thee something with "poly" in the name....[/quote]
So what is the consensus on using C0G/NPO ceramics in the signal path these days? John Hardy seems to claim it's fine (on page 8 of the linked document), and neither my measurements nor my tin ears see/hear much of a difference between C0G and "poly".
JDB.
[note the qualification wrt the dielectric; I can easily hear the difference between C0G and X7R, never mind Y5V. The values Butta mentions are easy to get in C0G/NPO, though]
So what is the consensus on using C0G/NPO ceramics in the signal path these days? John Hardy seems to claim it's fine (on page 8 of the linked document), and neither my measurements nor my tin ears see/hear much of a difference between C0G and "poly".
JDB.
[note the qualification wrt the dielectric; I can easily hear the difference between C0G and X7R, never mind Y5V. The values Butta mentions are easy to get in C0G/NPO, though]
[quote author="jdbakker"][quote author="JohnRoberts"]Ouch... ceramic cap RIAA.... get thee something with "poly" in the name....[/quote]
So what is the consensus on using C0G/NPO ceramics in the signal path these days? John Hardy seems to claim it's fine (on page 8 of the linked document), and neither my measurements nor my tin ears see/hear much of a difference between C0G and "poly".
JDB.
[note the qualification wrt the dielectric; I can easily hear the difference between C0G and X7R, never mind Y5V. The values Butta mentions are easy to get in C0G/NPO, though][/quote]
COG and NPO are GOP (good on paper). I have had problems with some SMT film caps being unstable in some SMT manufacturing processes due to heat sensitivity (again not a problem on paper). If they look good and sound good, that's two out of two. They probably are good if you can find them in the values you need.
I always liked polystyrene for being good and cheap, but it's not very compatible with modern manufacturing processes.
JR
So what is the consensus on using C0G/NPO ceramics in the signal path these days? John Hardy seems to claim it's fine (on page 8 of the linked document), and neither my measurements nor my tin ears see/hear much of a difference between C0G and "poly".
JDB.
[note the qualification wrt the dielectric; I can easily hear the difference between C0G and X7R, never mind Y5V. The values Butta mentions are easy to get in C0G/NPO, though][/quote]
COG and NPO are GOP (good on paper). I have had problems with some SMT film caps being unstable in some SMT manufacturing processes due to heat sensitivity (again not a problem on paper). If they look good and sound good, that's two out of two. They probably are good if you can find them in the values you need.
I always liked polystyrene for being good and cheap, but it's not very compatible with modern manufacturing processes.
JR
G
Guest
Guest
NP0 is a temperature coefficient.
Segnetoceramic caps are the worst for usage in audio signal path (and they sing quite loudly!) :grin:
Segnetoceramic caps are the worst for usage in audio signal path (and they sing quite loudly!) :grin:
