| Electronics > Beginners |
| Capacitor Tolerance with Negative Tolerance Only |
| (1/2) > >> |
| TinkerGDS:
I am replacing the capacitors on a Revox B261 Tuner. I have the service manual and started making a list of all of the electrolytics. I thought I understood capacitor tolerance: +-20%, -20% +80%, but most of the ones in the service manual are rated at -10% only. I don't understand what that means. Is that a shortcut for -10%, + 20%. I expected to see some information in the service manual like, all values represented are 20% unless otherwise noted, or something to that affect. So I'm not sure if there's a standard for parts and value listings, or if there really is such a capacitor tolerance as -10%. |
| danadak:
Different Cap technologies have different tolerance specs. They even have parts whose C rating is very sensitive to the V across them. Are you just replacing electrolytics ? http://www.kemet.com/Lists/TechnicalArticles/Attachments/6/What%20is%20a%20Capacitor.pdf http://www1.eere.energy.gov/solar/pdfs/8_tuttle.pdf Regards, Dana. |
| TinkerGDS:
Those are two great documents. I've saved them in my reference library. Yes, I am just replacing the electrolytics. I am not trying to make the tuner "better", I just want to bring it back to its original state when it was new back in 1982. |
| Cliff Matthews:
Ditto here, I love this place! Thanks Dana. |
| Kalvin:
--- Quote from: TinkerGDS on November 11, 2016, 01:32:04 pm ---I am replacing the capacitors on a Revox B261 Tuner. I have the service manual and started making a list of all of the electrolytics. I thought I understood capacitor tolerance: +-20%, -20% +80%, but most of the ones in the service manual are rated at -10% only. I don't understand what that means. Is that a shortcut for -10%, + 20%. I expected to see some information in the service manual like, all values represented are 20% unless otherwise noted, or something to that affect. So I'm not sure if there's a standard for parts and value listings, or if there really is such a capacitor tolerance as -10%. --- End quote --- My guess is the -10% notation means that the capacitance may be 10% less the nominal without compromising the sound quality, but it doesn't matter if the capacitance is higher than the nominal (+10% or %20, for example). |
| Navigation |
| Message Index |
| Next page |