four 1541,s parallel?

tubee · 25th September 2004, 02:40 PM

I am thinking to make a da converter, I2S signal, non OS and with 4 tda 1541a parallel like Cambridge and Wadia did in the nineties, feeding the digital signal to 4 dacs PCM56 or 1541 with 0.7 microsec. delaytime (1/4 Fs).
This to smooth the analog signal and reduce distorsion
Anyone experienced by this, or has idea's or schematics?

Also anyone who knows where to buy TDA 1541A on a reasonable price?

Tubee

rfbrw · 28th September 2004, 01:20 AM

Here is a circuit for the PCM56 that can be modified to suit the TDA1541A.

Paralleling up DAC chips

Bernhard · 28th September 2004, 03:15 PM

I have a few used 1541A left.
Maybe change to 2 x XX PCM56 soon...
Tested 17 chips recently and found some that beat every silvercrown

Sound much better than CD880 in a DCD1500mkII.
Not beat me...

Carondimonio · 28th September 2004, 03:21 PM

Hi Tubee,

Quote:

Also anyone who knows where to buy TDA 1541A on a reasonable price?

If you' re interested, there' s a group buy for TDA1541A going on, look in the "group buy" section.

Cheers,

Bruno

tubee · 28th September 2004, 05:37 PM

Hello Bernard

How do you test the used tda's?

By the way I now turn my CD's on a '83 CD300 with double1540!
Bought on a second hand market for a few Euri,s
CD drawer is about 6 cm high, that something else that those "plasticbombers"from now. Wadia used the same tuntable mechanism in the 90''s. Treble not perfect, but bass is wonderful. There are about 8 Sony chips in it also (logic or so), it seems at that time they worked ("a bit") together, philips & sony

tubee

jean-paul · 28th September 2004, 06:39 PM

Quote:

Originally posted by tubee
it seems at that time they worked ("a bit") together, philips & sony

They invented the cd system together.

Bernhard · 28th September 2004, 10:12 PM

Quote:

Originally posted by tubee

How do you test the used tda's?

By the way I now turn my CD's on a '83 CD300 with double1540!

Treble not perfect, but bass is wonderful.

Spectrum analyzer with -60dB signal

TDA1540 is 14bit mono DAC.

Very hard for 14bit to give perfect treble...

25th September 2004, 02:40 PM	#1
tubee diyAudio Member Join Date: Jul 2004 Location: Netherlands	four 1541,s parallel? I am thinking to make a da converter, I2S signal, non OS and with 4 tda 1541a parallel like Cambridge and Wadia did in the nineties, feeding the digital signal to 4 dacs PCM56 or 1541 with 0.7 microsec. delaytime (1/4 Fs). This to smooth the analog signal and reduce distorsion Anyone experienced by this, or has idea's or schematics? Also anyone who knows where to buy TDA 1541A on a reasonable price? Tubee

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28th September 2004, 01:20 AM	#2
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Here is a circuit for the PCM56 that can be modified to suit the TDA1541A. Paralleling up DAC chips

28th September 2004, 03:15 PM	#3
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	I have a few used 1541A left. Maybe change to 2 x XX PCM56 soon... Tested 17 chips recently and found some that beat every silvercrown Sound much better than CD880 in a DCD1500mkII. Not beat me...

28th September 2004, 05:37 PM	#5
tubee diyAudio Member Join Date: Jul 2004 Location: Netherlands	Hello Bernard How do you test the used tda's? By the way I now turn my CD's on a '83 CD300 with double1540! Bought on a second hand market for a few Euri,s CD drawer is about 6 cm high, that something else that those "plasticbombers"from now. Wadia used the same tuntable mechanism in the 90''s. Treble not perfect, but bass is wonderful. There are about 8 Sony chips in it also (logic or so), it seems at that time they worked ("a bit") together, philips & sony tubee

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