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Foulacy
Bronze Member
USA
65 Posts |
 Posted - 03/24/2009 : 02:12:39
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I accidentally ran my ce-2 on an 18v adapter for about 5 minutes. Seems fine but when could have happened? (or what might happen in the future  ? |
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Foulacy
Bronze Member
USA
65 Posts |
Posted - 03/24/2009 : 02:13:55
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| actually, the ce-2 is 12v but i would assume the same rules apply? |
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cctsim
Silver Member
United Kingdom
418 Posts |
Posted - 03/24/2009 : 04:44:53
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In your case, the overload protection/ regulator z-diode D7 in CE2 saved your pedal, however, I wont push my luck and try that very often.
The operating range of electronic components such as capacitors and opamps need to be checked if you want to run a pedal with > 9V power supply.
Most boss electrolytic capacitors are rated 16V or less depending on the location. You can see on CE2: C20 is rated 6.3V, C29 is rated 16V and C30 is rated 10V which is really not 18V material.
The JRC4558 opamps are rated for +-18V operation so there is no problem here.
The MN3207 chip is rated max 10V, big flame/smoke problem here.
Anyway, some pedals sound awful if you run them with > 12V power supplies, e.g. overdrive/distortion pedals, it is really not really worth it I have tried.
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cctsim
Silver Member
United Kingdom
418 Posts |
Posted - 03/24/2009 : 04:49:15
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| I forgot to mention that some pedal don't have the overload protection diode. Instead there is only a reverse polarity protection diode. If you were to run such pedal with 18V, it would be most likely damaged. |
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Foulacy
Bronze Member
USA
65 Posts |
Posted - 03/24/2009 : 04:57:42
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| great information. hopefully that capacitor saved my butt. |
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Topic |
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What happens when you power a 9v pedal with 18v?
