Anyone know a NEC K821 Replacement?

KyferEz · 10th May 2007, 05:46 PM

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

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...

KyferEz · 7th June 2007, 07:32 PM

Anyone?

10th May 2007, 05:46 PM	#1
KyferEz diyAudio Member Join Date: Apr 2004 Location: Wilmington, NC	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

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Replacement LED	DreadPirate	Parts	11	14th November 2009 04:45 PM
Replacement amp for A-Bus?	Greg911	Class D	0	16th November 2008 02:33 PM
MTX 5 ch pot replacement	pk386	Parts	2	1st October 2006 04:32 AM
Replacement for 5R4	Ralph	Tubes / Valves	8	16th December 2003 10:02 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

10th May 2007, 06:14 PM	#2
sixtek diyAudio Member Join Date: Jan 2007	Hi, Try 2SK1296 or 2SK1291 - if they are available there. Cheers,

10th May 2007, 06:33 PM	#3
KyferEz diyAudio Member Join Date: Apr 2004 Location: Wilmington, NC	Thanks. Mcminone has the 2SK1296. Off on another ordering spree

10th May 2007, 06:45 PM	#4
sixtek diyAudio Member Join Date: Jan 2007	Checked in my other substitute pocketbook and that says 2SK1296 too So I'm sure that will works! Regards,

5th June 2007, 05:58 PM	#5
KyferEz diyAudio Member Join Date: Apr 2004 Location: Wilmington, NC	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

5th June 2007, 07:57 PM	#6
sixtek diyAudio Member Join Date: Jan 2007	Is the bias of OP devices readjusted yet?

5th June 2007, 11:38 PM	#7
KyferEz diyAudio Member Join Date: Apr 2004 Location: Wilmington, NC	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...

7th June 2007, 07:32 PM	#8
KyferEz diyAudio Member Join Date: Apr 2004 Location: Wilmington, NC	Anyone?