Lite DAC-AH resistor Values

recca · 28th November 2007, 07:27 PM

Does anyone know what the resistor values for the data in resistors to the DAC chips? I believe they are R3, R8, R11, R14, R15, R18, R21, R24 in this schematic. Do you think swapping them out would make an appreciable difference?

Schematic

Thanks

dddac · 28th November 2007, 09:54 PM

as long as you leave the 5532 opamp on the board, it does not matter...

On a serious note: I have tried several values between 10 and 100 Ohm and hear no difference

pupsik46 · 28th November 2007, 10:30 PM

Its better to use >20ohm resistors. I had just bad experience with 10ohm resistors.
After changing to 80ohm resistors, oscillation disappeared.

recca · 28th November 2007, 11:47 PM

Thanks. I'm actually bypassing the output stage with a Jupiter 2.2uF cap and it sounds great. I'm going to change the R35 and R36 resistors as well with Riken Ohm's. Just trying to see if there's any benefit to changing the other ones since they are inline with the signal path. So any value greater than 20ohm is okay?

pupsik46 · 29th November 2007, 06:33 AM

Quote:

Originally posted by recca
So any value greater than 20ohm is okay? [/B]

Yes, 20 to 100ohm if fine.

28th November 2007, 07:27 PM	#1
recca diyAudio Member Join Date: Jun 2005 Location: San Francisco	Lite DAC-AH resistor Values Does anyone know what the resistor values for the data in resistors to the DAC chips? I believe they are R3, R8, R11, R14, R15, R18, R21, R24 in this schematic. Do you think swapping them out would make an appreciable difference? Schematic Thanks

28th November 2007, 09:54 PM	#2
dddac diyAudio Member Join Date: Jul 2003 Location: Wiesbaden	as long as you leave the 5532 opamp on the board, it does not matter... On a serious note: I have tried several values between 10 and 100 Ohm and hear no difference __________________ www.dddac.de Happy listening and building

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28th November 2007, 10:30 PM	#3
pupsik46 diyAudio Member Join Date: Aug 2005	Its better to use >20ohm resistors. I had just bad experience with 10ohm resistors. After changing to 80ohm resistors, oscillation disappeared.

28th November 2007, 11:47 PM	#4
recca diyAudio Member Join Date: Jun 2005 Location: San Francisco	Thanks. I'm actually bypassing the output stage with a Jupiter 2.2uF cap and it sounds great. I'm going to change the R35 and R36 resistors as well with Riken Ohm's. Just trying to see if there's any benefit to changing the other ones since they are inline with the signal path. So any value greater than 20ohm is okay?

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