Improving CD67's regulators?

dantwomey · 25th January 2004, 10:44 PM

After much reading I'm contemplating on whether or not there is anything to be gained by replacing all three of my CD67s voltage regulators. I'm looking at replacing my 7805 with a clone of the LM317 Andrew Weeks illustrated on the acoustic.org.uk CD63 clock hack. After that I'd like to replace the 78M12/79M12 with a similar LM317/LM337 combo. Included below is all the necessary schematics for clarity's sake.

Regards,
Dan

Pedja · 25th January 2004, 10:58 PM

If you are about CD63/67 and regulators, better put more independent regulators for digital ICs. The main point of the mod you saw is in giving to the oscillator independently regulated supply.

Pedja

dantwomey · 25th January 2004, 11:52 PM

I'm not going to do the clock hack itself because I already have a Kwak Clock v7 installed. I'm looking at borrowing ALW's LM317 idea and applying it to my 7805. I like the idea of improving all three of my 'on board' regulators for the sake of simplicity. If I can show a 'gain' with a few simple parts I think it would be a great contribution to DIY'ers like myself. The one's with modest skills and a modest budget.

Regards,
Dan

Zombie · 26th January 2004, 07:07 AM

Hello!
I can warmly recommend you to use a separate xformer/rectifying bridge to feed the digital regulators. You can fit it under the stiffening beam inside.
Cleaning up the +7-12V isn't such a bad idea either...
Cheers,
T

Elso Kwak · 26th January 2004, 08:40 AM

Hi,
This guy is raving about the KF50BDT from ST.
http://java.audioasylum.com/cgi/m.pl...dt&r=&session=
Maybe an idea to try?

dantwomey · 26th January 2004, 10:49 PM

Here is the PDF for the KF500 Series for the benefit of the forum.

Regards,
Dan

P.S. Thanks Elso!

eganz · 26th January 2004, 11:27 PM

The New japan Radio NJM78XX regulators from digikey look promising too...

25th January 2004, 10:44 PM	#1
dantwomey diyAudio Member Join Date: Feb 2002 Location: Canada	Improving CD67's regulators? After much reading I'm contemplating on whether or not there is anything to be gained by replacing all three of my CD67s voltage regulators. I'm looking at replacing my 7805 with a clone of the LM317 Andrew Weeks illustrated on the acoustic.org.uk CD63 clock hack. After that I'd like to replace the 78M12/79M12 with a similar LM317/LM337 combo. Included below is all the necessary schematics for clarity's sake. Regards, Dan

26th January 2004, 08:40 AM	#5
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	KF50BDT Hi, This guy is raving about the KF50BDT from ST. http://java.audioasylum.com/cgi/m.pl...dt&r=&session= Maybe an idea to try?

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25th January 2004, 10:58 PM	#2
Pedja diyAudio Member Join Date: Jun 2002 Location: Serbia	If you are about CD63/67 and regulators, better put more independent regulators for digital ICs. The main point of the mod you saw is in giving to the oscillator independently regulated supply. Pedja

25th January 2004, 11:52 PM	#3
dantwomey diyAudio Member Join Date: Feb 2002 Location: Canada	I'm not going to do the clock hack itself because I already have a Kwak Clock v7 installed. I'm looking at borrowing ALW's LM317 idea and applying it to my 7805. I like the idea of improving all three of my 'on board' regulators for the sake of simplicity. If I can show a 'gain' with a few simple parts I think it would be a great contribution to DIY'ers like myself. The one's with modest skills and a modest budget. Regards, Dan

26th January 2004, 07:07 AM	#4
Zombie diyAudio Member Join Date: Feb 2003 Location: At home	Hello! I can warmly recommend you to use a separate xformer/rectifying bridge to feed the digital regulators. You can fit it under the stiffening beam inside. Cleaning up the +7-12V isn't such a bad idea either... Cheers, T

26th January 2004, 10:49 PM	#6
dantwomey diyAudio Member Join Date: Feb 2002 Location: Canada	Here is the PDF for the KF500 Series for the benefit of the forum. Regards, Dan P.S. Thanks Elso!

26th January 2004, 11:27 PM	#7
eganz diyAudio Member Join Date: Sep 2003 Location: MN	The New japan Radio NJM78XX regulators from digikey look promising too...

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