so you didnt consider using the SMD versions of the wima films you have used liberally? or substituting evox/rifa/kemet or new panasonic PPS or PET SMD films? the design looks very good to me, but I would think it would be even lower noise with the SMD parts
or you chose through-hole to make it more appealing and easier for people in kit form? that would be totally understandable, because strangely there seems a perception that SMD is hard, I actually prefer it. same with the references. but those SMD version 431 are pretty dinky little sot323
or you chose through-hole to make it more appealing and easier for people in kit form? that would be totally understandable, because strangely there seems a perception that SMD is hard, I actually prefer it. same with the references. but those SMD version 431 are pretty dinky little sot323
Last edited:
That´s the point. SMD parts a hard to solder for me. So in my design we have normal through hole parts.
All critical decoupling caps are 2,5mm ones, so the SMD caps aren´t much smaller. 😉
First power up
Because i have a small problem on the -15V regulator line witch i must fix with salas help first, i checked all voltages without the TDA1541A.
Everything works perfekt! 😀
Because i have a small problem on the -15V regulator line witch i must fix with salas help first, i checked all voltages without the TDA1541A.
Everything works perfekt! 😀
An externally hosted image should be here but it was not working when we last tested it.
very nice mate!! looks great. right OK sure, I guess i'm just lucky to still have very good eyesight and fine motor skills at 36 years old., ask me in another 20-30 years if I still like smd 😉 but then by then things will probably be so small, DIY will be the skill of programing your desktop pick and place properly.
not so much the size, though thats a factor; in high speed designs, as you know, the lead inductance dominates.
Some additional photos from the working modules
The +/- Power Supply Modules
Shunt regulator Modules for the TDA1541A & additional Digital parts
Circuit design by Salas
The TDA1541A DAC Module
The Tube-I-Zator Output Stage Module
An externally hosted image should be here but it was not working when we last tested it.
The +/- Power Supply Modules
An externally hosted image should be here but it was not working when we last tested it.
Shunt regulator Modules for the TDA1541A & additional Digital parts
Circuit design by Salas
An externally hosted image should be here but it was not working when we last tested it.
The TDA1541A DAC Module
An externally hosted image should be here but it was not working when we last tested it.
The Tube-I-Zator Output Stage Module
but I need to say it looks sweet and I reckon it'll sound pretty sweet too. I know it has impressed one of my mates here already, he sent me a link. good work
Thank you for the flowers 🙂
What exactly impresssed him? The DAC Module ore something else?
I think thelayout and liberal use of film caps for all manner of decoupling 😉 maybe he likes the colour red hehe.
Project finished !!!
The small problems on the -15V line of the regulator are solved.
I made a cap polarity fault on the silkscreen.
Thank´s for your support to find the problem, Salas.
I made a second small bug at the 74HC02. Perhaps it was a little late at the evening, i insert the IC in the layout... 😛
All not used flip-flops are grounded, but i grounded not only the inputs. 😱
Result was a short-circuit current that drops the whole +5V line. So for now, i lifted the three flip-flop outputs.
Thank god, both bugs were no big things 🙂
Also to Salas advice, i canceled all Wima film caps on the regulators.
Furthermore i changed all 220µF from Panasonic FM to Nichicon FG.
The current for all 4 regulators is set via a 10R 1% 5W resistor to ~200mA.
I used Vishay NS-5 non inductive, wire wound resistors here.
On the Tube-I-Zator side, the Wima MKP-10 output caps are changed to a pair ClarityCap MR.
The digital input comes from my iMac via USB to my Teralink X2 converter and from its I2S output to the TDA1541A DAC-Module.
At the moment the X2 gets the power over the USB connector, but i will change that.
It will be also connected to the 2nd +5V regulator module.
Now it´s time to burn in and in the meanwhile i solder the 2nd DAC-Module... 😀
P.S.: The first sound out of my horns was
An externally hosted image should be here but it was not working when we last tested it.
The small problems on the -15V line of the regulator are solved.
I made a cap polarity fault on the silkscreen.
Thank´s for your support to find the problem, Salas.
I made a second small bug at the 74HC02. Perhaps it was a little late at the evening, i insert the IC in the layout... 😛
All not used flip-flops are grounded, but i grounded not only the inputs. 😱
Result was a short-circuit current that drops the whole +5V line. So for now, i lifted the three flip-flop outputs.
Thank god, both bugs were no big things 🙂
Also to Salas advice, i canceled all Wima film caps on the regulators.
Furthermore i changed all 220µF from Panasonic FM to Nichicon FG.
The current for all 4 regulators is set via a 10R 1% 5W resistor to ~200mA.
I used Vishay NS-5 non inductive, wire wound resistors here.
On the Tube-I-Zator side, the Wima MKP-10 output caps are changed to a pair ClarityCap MR.
The digital input comes from my iMac via USB to my Teralink X2 converter and from its I2S output to the TDA1541A DAC-Module.
At the moment the X2 gets the power over the USB connector, but i will change that.
It will be also connected to the 2nd +5V regulator module.
Now it´s time to burn in and in the meanwhile i solder the 2nd DAC-Module... 😀
P.S.: The first sound out of my horns was
Hi Maurizio,
it make only sense to start a GB, when there is enough interest from the community.
So let´s wait and see.
Best regards,
Oliver
it make only sense to start a GB, when there is enough interest from the community.
So let´s wait and see.
Best regards,
Oliver
I suppose all the borbely-esque low esr power-supply-reservoir PCBs are gone? or you never did this GB?
I have removed the +/- Power supply module from my signature, because since march i had only one interest.
If this change in conjunction with the DAC project, i will add it again.
If this change in conjunction with the DAC project, i will add it again.
Hi Maurizio,
yes. In the meantime i finished the 2nd DAC module. Now both running parallel into the Tube-I-zator output buffer.
What should i say.... It runs and sounds like
yes. In the meantime i finished the 2nd DAC module. Now both running parallel into the Tube-I-zator output buffer.
An externally hosted image should be here but it was not working when we last tested it.
What should i say.... It runs and sounds like
- Status
- Not open for further replies.