Case upgrade for my NOS DAC, plus some tweaks

Nielsio · 10th January 2009, 09:04 PM

More pictures here:
http://picasaweb.google.com/nielsio/...nalogConvertor

dddac · 10th January 2009, 09:45 PM

if you want to do some real significant tweak, replace the couple capacitors with some real good stuff.

and parallel some 1543

pjpoes · 10th January 2009, 09:56 PM

I believe those coupling caps are Mullard NOS poly caps. While not everyone would agree, those are pretty good caps (if that is what they are). They are quite sought after and many people love their sound.

If I was to make a recommendation it would be to increase the supply capacitance and change the rectifier to a better one. I know there is technically no need, but my preference is too very large amounts of capacitance, and/or resistors and inductors for a CLC or CRC supply. Even with regulators I find this makes for an improvement in sound. In fact, it does make a measurable difference as well in many preamps. As to the rectifier, most people find that modern FRED type rectifiers lower the noise floor and improve sound. I've never found a FRED type or even a decent bridge in that small round type. One could be built from individual diodes easily enough.

10th January 2009, 09:04 PM	#1
Nielsio diyAudio Member Join Date: Nov 2002 Location: The Netherlands	Case upgrade for my NOS DAC, plus some tweaks More pictures here: http://picasaweb.google.com/nielsio/...nalogConvertor __________________ E-MU 0404 . Behringer DEQ2496 . TDA1543 NOS . JLTi tube buffered LM3875 . Supravox 215 Signature Bicone 125L vented

10th January 2009, 09:45 PM	#2
dddac diyAudio Member Join Date: Jul 2003 Location: Wiesbaden	if you want to do some real significant tweak, replace the couple capacitors with some real good stuff. and parallel some 1543 __________________ www.dddac.de Happy listening and building

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10th January 2009, 09:56 PM	#3
pjpoes diyAudio Member Join Date: Jan 2005 Location: New York	I believe those coupling caps are Mullard NOS poly caps. While not everyone would agree, those are pretty good caps (if that is what they are). They are quite sought after and many people love their sound. If I was to make a recommendation it would be to increase the supply capacitance and change the rectifier to a better one. I know there is technically no need, but my preference is too very large amounts of capacitance, and/or resistors and inductors for a CLC or CRC supply. Even with regulators I find this makes for an improvement in sound. In fact, it does make a measurable difference as well in many preamps. As to the rectifier, most people find that modern FRED type rectifiers lower the noise floor and improve sound. I've never found a FRED type or even a decent bridge in that small round type. One could be built from individual diodes easily enough.

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