Sonic Impact and DC Ofset...

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doggie

Sonic Impact and DC Ofset...
« on: 27 Feb 2005, 08:56 pm »
Hi All,

I just finished putting my SI into a nice Par-Metal chassis with an SLA battery and good connectors and wire. No fancy mods yet except a better supply cap and a little creative bypassing of on-board wire paths. Boy I hate surface mount components. Pushing my AKG K1000 headphones it sounds very good indeed. Next stop is some new inductors from Mouser.

Any ideas what an acceptable DC off set is when the amp up and running? I never checked it while it was in it's original chassis or in my experimenters chassis so I have nothing to compare. I have one channel at 2mv and the other at 45mv. From making may last chipamp I seem to remember that this was acceptable.

Best,

Paul

Panelhead

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Re: Sonic Impact and DC Ofset...
« Reply #1 on: 27 Feb 2005, 11:02 pm »
Quote from: doggie
Hi All,

I just finished putting my SI into a nice Par-Metal chassis with an SLA battery and good connectors and wire. No fancy mods yet except a better supply cap and a little creative bypassing of on-board wire paths. Boy I hate surface mount components. Pushing my AKG K1000 headphones it sounds very good indeed. Next stop is some new inductors from Mouser.

Any ideas what an acceptable DC off set is when the amp up and running? I never checked it while it was in it's original chassis or in my experim ...


  I have four of these now. The dc offsets are all over the place. The best one so far has 10 mv on one channel and 28 on the other. The worst has 120 mv and 25 mv. The changes on run in some, but is fairly constant.
  Recheck your connections on this, I have yet to see 2 mv. The specs list it as <150mv.
  With my crossoverless speakers there is a little thump on power up. Think it is worse on the ones with the most offset.

                         George