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-   -   Anyone know a NEC K821 Replacement? (http://www.diyaudio.com/forums/solid-state/101683-anyone-know-nec-k821-replacement.html)

KyferEz 10th May 2007 05:46 PM

Anyone know a NEC K821 Replacement?
 
Working on a Mobile Authority 120ZX. It has 4 of the NEC K812 for the power supply that need replacement.

I checked NEC and they say it's obsolete. Suggestions?

Thanks

sixtek 10th May 2007 06:14 PM

Hi,

Try 2SK1296 or 2SK1291 - if they are available there.

Cheers,

KyferEz 10th May 2007 06:33 PM

Thanks. Mcminone has the 2SK1296. Off on another ordering spree :D

sixtek 10th May 2007 06:45 PM

Checked in my other substitute pocketbook and that says 2SK1296 too ;)
So I'm sure that will works!

Regards,

KyferEz 5th June 2007 05:58 PM

Back to working on this amp; I just got in the parts.

It's working now, but the 2 right channels are not as loud as the 2 left channels. Why would this be?

Thanks

sixtek 5th June 2007 07:57 PM

Is the bias of OP devices readjusted yet?

KyferEz 5th June 2007 11:38 PM

I'm sorta new to this, so some more explanation is needed... Are you talking about the pots in each channel of the outputs?

If so, how do I properly adjust them? I've attached an image so you can see the output stage of this amp.

P.S. In case it's needed for this, I do have a good scope...

http://s210.photobucket.com/albums/b...t=IMGP1323.jpg

KyferEz 7th June 2007 07:32 PM

Anyone?


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