Coud you post or mail me schematic od D1 and how it is connected to TDA1541?
I made http://www.diyaudio.com/forums/attachment.php?s=&postid=578104&stamp=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.
I made http://www.diyaudio.com/forums/attachment.php?s=&postid=578104&stamp=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.
I used the same schematic as you.
Does your TDA1541A work OK without D1 I/V?
Yes, It's OK.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.
Does your TDA1541A work OK without D1 I/V?
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.
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.
I don't have the reclock circut. I tried to make DAC as simple as possible. Afterwards I planed to put the reclock circut. I'd try to borrow an osciloscope.
Shematic could be seen here:
http://www.pedjarogic.com/1541a/pdf/rev1_1b_sch.pdf
I did not make the I/V stage like this one on the schematic, but I made D1 I/V that should be connected directly to the Aol (Aor) pins on TDA1541A.
Shematic could be seen here:
http://www.pedjarogic.com/1541a/pdf/rev1_1b_sch.pdf
I did not make the I/V stage like this one on the schematic, but I made D1 I/V that should be connected directly to the Aol (Aor) pins on TDA1541A.
I was also thinking about the D1 output stage but was impressed with passive I/V so I thought that i might wait.. . . Ok waited long enough.
If the dac chip requires a reference voltage (for bias) of 2/3 Vcc, roughly 2.5 volts, do you need to keep the same bias circuit that already exists on the dac board? Or, do you bias the D1 with its potentiometers at 2.5 and connect to the dac chip?
Any thoughts would be helpful.
If the dac chip requires a reference voltage (for bias) of 2/3 Vcc, roughly 2.5 volts, do you need to keep the same bias circuit that already exists on the dac board? Or, do you bias the D1 with its potentiometers at 2.5 and connect to the dac chip?
Any thoughts would be helpful.
Has anyone used 2 TDA 1541A's per channel for balanced output?
Yes I did. I used the same method to invert the data as it is done in the original D-1. Apart from the different DAC and PS everything else between the digital receiver and analog out was just copy/paste. Works great...
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