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Toasted Pre

I have a 220V amplifier (Krell 2250) connected to a 110V pre (Acuphase C2000) and after an year of faithful service the right balanced output from the pre toasted!

I’ve attached some photos of the board so you can see the problem I have here.

http://pbckt.com/sd.d8Vb

It seems I should not have mixed 220V with 110V in the same system.

The technician says it can fixed with parts he can find here but I thought of asking the more experienced...

Best,
gabriel_37

Showing 2 responses by jea48

jea48
4,669 posts
 
Gabriel_37,
So much for AGon's history.....

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Posting since Apr, 2010 Membership Private user

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The preamp did not short out because the amp is fed from 220V and the preamp from 120V, jmho.

You can check the archives here on Agon and AA and find others that have or do the same now. Albert Porter for one, did at one time.
jea48
4,669 posts
 
Stanwal, Ghostrider45,

It seems I should not have mixed 220V with 110V in the same system.
Gabriel_37

Gabriel_37 profile says he lives in the USA. I believe he has a 240V power receptacle outlet for the amp and a 120V power receptacle outlet for the preamp.

That in itself would not cause the preamp problem. Might cause a slight buzz but not any damage, imo....

Looking at the pictures it almost looks like something like pop was spilled on the top and ran through the vent holes and caused electrical components and traces to arc and short out. Sure is a lot of black carbon around the burnt area in the pictures.

Either that or one hell of a lightning strike hit the preamp. If that were the case though I would think other audio equipment would have been damaged as well.

Or it could of just been an electrical component short out arc across and the rest is history....
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