Very nice done there!
What kind of capacitors do you use there at the output?
Whats that black thing between them? It looks like a heatsink.
What kind of capacitors do you use there at the output?
Whats that black thing between them? It looks like a heatsink.
The capacitors are russian PIO 10uF/160V.
The heatsink between them is there to keep them in place without destroying their terminals (they are quite heavy).
Further details: The DAC/receiver section is fed with a battery (12V 1.2Ah SLA, since the consumption is about 40-50mA max), with Oscons all around an double regulation for each section.
The "signal lock" output of the CS8414 is used to detach the battery charger (which is re-attached after 1 min of no signal)
Cheers
Andrea
The heatsink between them is there to keep them in place without destroying their terminals (they are quite heavy).
Further details: The DAC/receiver section is fed with a battery (12V 1.2Ah SLA, since the consumption is about 40-50mA max), with Oscons all around an double regulation for each section.
The "signal lock" output of the CS8414 is used to detach the battery charger (which is re-attached after 1 min of no signal)
Cheers
Andrea
Looks fantastic, and i believe sound even better. Did u use a volume control right at the output? the Passlab D1 has one...just wondering if the o/p is high and therefore Passlab put volume control.Andypairo said:Here is my D1 stage, used to convert the iout of a TDA1545A DAC into useful voltage 😉
The first impressions are quite good, but I'm heavily biased and my wife claims to be deaf 😀
Soon I'll bring to a friend to get his opinion😕
Cheers
Andrea
I didn´t use a volume control either.
Thats the reason that on the PCB there are 4,7uF DC blocking caps and not the 220uF ones like in the original DAC schematic.
Thats the reason that on the PCB there are 4,7uF DC blocking caps and not the 220uF ones like in the original DAC schematic.
pictures
No i have not made pictures. Perhaps I make some next week.
It looks like a mesh so i will send them privately to you.
Main reason is that i used big caps that do not fit on the pcb's.
No i have not made pictures. Perhaps I make some next week.
It looks like a mesh so i will send them privately to you.
Main reason is that i used big caps that do not fit on the pcb's.
D1 AND PHILIPS 963SA
JAAP,
I'm interested in D1 installed to PHILIPS 963SA. Could you please show your modifications details?
JAAP,
I'm interested in D1 installed to PHILIPS 963SA. Could you please show your modifications details?
963
I took the first opamp after the dac out. I used to contacts on the pcb to connect the D1. I soldered very thin coax on it.
I added toroid transformer in the left side of the 963 (on the bottom under the 220 volt connector).
I took the first opamp after the dac out. I used to contacts on the pcb to connect the D1. I soldered very thin coax on it.
I added toroid transformer in the left side of the 963 (on the bottom under the 220 volt connector).
D1 AND PHILIPS 963SA
Jaap.
From DAC 1955 the signal is + / - current then the signal after D1 will be +/- voltage.
Did you make balanced or unbalanced output?
If you've done unbalanced output, please suggest how you combine 2 phase signals.
Jaap.
From DAC 1955 the signal is + / - current then the signal after D1 will be +/- voltage.
Did you make balanced or unbalanced output?
If you've done unbalanced output, please suggest how you combine 2 phase signals.
The circuit doesn´t convert balanced to unbalanced, so if you dont want a balanced output signal you just use the in phase + signal and leave the - signal out.
Or what would be very complicated.
You use both signals with 2 I/V Stages you get balanced out signals and then with a circuit like the Balanced lline stage you take both signals at input and then mix them into one and get a single ended signal at the output.
I dont see any advantages for something so complicated.
Or what would be very complicated.
You use both signals with 2 I/V Stages you get balanced out signals and then with a circuit like the Balanced lline stage you take both signals at input and then mix them into one and get a single ended signal at the output.
I dont see any advantages for something so complicated.
D1 AND PHILIPS 963SA
Jaap,
You've told that you just took opamp AD8022 out then connect IOUT from there.
From 963SA schematic there are +8V_OpAmp series 1k8 to IOUT and also there are 100R + 100p parallel with 470R + 180R connected to AD8022 output and then also connected to output stage AD8032.
So these circuits will also be connected to input of D1. I think these circuits will have effect to D1.
Please advise what you have done.
Jaap,
You've told that you just took opamp AD8022 out then connect IOUT from there.
From 963SA schematic there are +8V_OpAmp series 1k8 to IOUT and also there are 100R + 100p parallel with 470R + 180R connected to AD8022 output and then also connected to output stage AD8032.
So these circuits will also be connected to input of D1. I think these circuits will have effect to D1.
Please advise what you have done.
D1 PCB
Hi Promitheus,
I'm interested in 1 pcb of D1 I/V stage.
What is the cost of this pcb?
What is the post office airmail shipping cost to Bangkok, Thailand?
Can you accept PAYPAL for payment?
Hi Promitheus,
I'm interested in 1 pcb of D1 I/V stage.
What is the cost of this pcb?
What is the post office airmail shipping cost to Bangkok, Thailand?
Can you accept PAYPAL for payment?
Can I run
http://www.diyaudio.com/forums/showthread.php?postid=578104#post578104
promitheus' scheme directly to a TDA1541A without any mods?
http://www.diyaudio.com/forums/showthread.php?postid=578104#post578104
promitheus' scheme directly to a TDA1541A without any mods?
What PSU do I use?
Also, how can the PSU from the service manual of the Pass D1 give +30v & -30v from 7815 and 7915 regulators?
Also, how can the PSU from the service manual of the Pass D1 give +30v & -30v from 7815 and 7915 regulators?
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