D1 I/V with TDA 1541A - diyAudio
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Old 19th June 2006, 07:05 AM   #1
smario is offline smario  Croatia
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Default D1 I/V with TDA 1541A

Hello !

I'd like to put D1 I/V stage on DAC with TDA 1541. I've read somewhere that this could be done. Could somebody post (or send me) a schematic of I/V stage and how to connect it to TDA 1541? Any listening impressions?

Thanks in advance !
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Old 19th June 2006, 10:15 AM   #2
santi is offline santi  Thailand
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Hi smario
You can connect D1 to TDA1541A without any problem. Don't forgot to remove TDA1541A's R I/V.

The sound was very nice (for my ears).
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Old 19th June 2006, 10:28 AM   #3
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Coud you post or mail me schematic od D1 and how it is connected to TDA1541?

I made http://www.diyaudio.com/forums/attac...amp=1108695002


Is it ok to connect Ina(b) directy to Aol (Aor) on TDA1541A ? I trimmed Ina to 0 V and after connection to Aol nothing happened.
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Old 19th June 2006, 10:58 AM   #4
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I used the same schematic as you.

Quote:
Is it ok to connect Ina(b) directy to Aol (Aor) on TDA1541A ? I trimmed Ina to 0 V and after connection to Aol nothing happened.
Yes, It's OK.

Does your TDA1541A work OK without D1 I/V?
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Old 19th June 2006, 11:02 AM   #5
smario is offline smario  Croatia
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Quote:
Does your TDA1541A work OK without D1 I/V?
How could I check, if it works ok without I/V? All voltages (+5V,-5V,-15V) are ok.
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Old 19th June 2006, 11:14 AM   #6
santi is offline santi  Thailand
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Use R I/V, 47-150 Ohms connect AOL, AOR to ground then connect AOL, AOR to your amp. The signal was very low, just turn your volumn more than usual.
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Old 19th June 2006, 11:31 AM   #7
smario is offline smario  Croatia
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I'll try this resistors as soon as I come home and report the results next morning.

Thanks !
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Old 19th June 2006, 06:54 PM   #8
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I put 82 ohm resistors and connected the amp. The result is nothing. Input reciever is locked on signal from the cd-transport but nothing is out from the dac. I'll have to dismantle the entire dac and check it.

Does anybody have have any idea what could be wrong?
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Old 19th June 2006, 11:46 PM   #9
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Did you read the data sheet to determine the correct I/V resistor? I think the 1543 uses 1k. If the chips are similar, 82r would be a little low and might not make enough voltage. You also might have to set the current on the dac with another resistor to Aground. Sorry if this is not helpful, I don't have the data sheet in front of me.
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Old 20th June 2006, 03:32 AM   #10
santi is offline santi  Thailand
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smario
Does you have "reclock circuit" between digital receiver and dac?
If yes, try to bypass the reclock.
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