I think it's better to have separate transformer for USB input and clean side for isolation.
Still trying to figure out what but aiming for a link between built environment business model continuity and environmental risks and opportunities scenarios
Somewhere here on the forum there is advise to insert a diode into the 5V line of the JLS to lower the voltage a bit: I tried, since the heatsink stays much cooler.
Ahaha, it is the club of the guys whom have 666 DACs already to be able to fill in the form with your blood ! 🤣
Is there a strong case for a separate transformer for iv and usb or should I order single transformer with 2x9 2x15?
@voxxonline Digital interference between windings.
Note that the output voltage after rectification and filtration is
transformer output voltage * 1.4142
2x 9 ac == 2x 12.7 dc for regulator (if the output from regulator is 5V, you will need dissipate 7.7V x I into heat)
2x 15 ac == 2x 21.2 dc for regulator (if the output from regulator is 12V, you will need dissipate 6.2V x I into heat)
If the required output voltages from regulator are like +-5V and +-12V, and regulators are LDO type, custom transformer with voltages 2x5 2x10 will produce less power losses on regulators 🙂
+-5V and +-15V LDO regulators == 2x5 2x12 ac
Note that the output voltage after rectification and filtration is
transformer output voltage * 1.4142
2x 9 ac == 2x 12.7 dc for regulator (if the output from regulator is 5V, you will need dissipate 7.7V x I into heat)
2x 15 ac == 2x 21.2 dc for regulator (if the output from regulator is 12V, you will need dissipate 6.2V x I into heat)
If the required output voltages from regulator are like +-5V and +-12V, and regulators are LDO type, custom transformer with voltages 2x5 2x10 will produce less power losses on regulators 🙂
+-5V and +-15V LDO regulators == 2x5 2x12 ac
Thanks, Miro. That's why I am thinking of getting lower-voltage transformers.
Shouldn' it be transformer (output voltage * 1.4142) - 1.4142?
So your recommendation is to get 2x5 2x10 for the DAC. DAC stage is on ubib- Salas is asking for 5V extra.
And another one for USB + Clock - both 5V?
And another one for a much later build of IV stage (it needs +-15V so I guess 2x12V would suffice)
Shouldn' it be transformer (output voltage * 1.4142) - 1.4142?
So your recommendation is to get 2x5 2x10 for the DAC. DAC stage is on ubib- Salas is asking for 5V extra.
And another one for USB + Clock - both 5V?
And another one for a much later build of IV stage (it needs +-15V so I guess 2x12V would suffice)
Which regulator do you want to use?
If you use PSU2,you need +/-12v secondary.
For I/V if you use ubib or super regulator,you need +/-15v.or you could have another+/-15v for LR.
I used lt3045/3094 from woodturner-fran so I used from PSU2 raw psu.
It was great that small space with regs LR each.
I think it's good to have 2 transformers for USB and one custom for Dac+IV.
This way, it's easier to change or modding plan after build.
But I am noob so better ask someone for best way for sound quality.
If you use PSU2,you need +/-12v secondary.
For I/V if you use ubib or super regulator,you need +/-15v.or you could have another+/-15v for LR.
I used lt3045/3094 from woodturner-fran so I used from PSU2 raw psu.
It was great that small space with regs LR each.
I think it's good to have 2 transformers for USB and one custom for Dac+IV.
This way, it's easier to change or modding plan after build.
But I am noob so better ask someone for best way for sound quality.
Basically I have 2 ubib which I was planning to hook up to DAC digital and analogue.
I have unpopulated PSU2 which I received with your dac chips, Tamra.
Minutes ago I got delivery of several FlexReg boards.
I can mix and match psu in any order - if say digital or analogue dac side is going to benefit from shunt- it will go there. If shunt is better for IV- it goes there.
Same for other boards.
I have unpopulated PSU2 which I received with your dac chips, Tamra.
Minutes ago I got delivery of several FlexReg boards.
I can mix and match psu in any order - if say digital or analogue dac side is going to benefit from shunt- it will go there. If shunt is better for IV- it goes there.
Same for other boards.
I wonder if wood turner -fran have PCB for IV,
It worked well.
https://www.diyaudio.com/community/threads/possible-gb-for-lt3045-3094-pcb-ref-smd-fc-cen-iv.402297/
It worked well.
https://www.diyaudio.com/community/threads/possible-gb-for-lt3045-3094-pcb-ref-smd-fc-cen-iv.402297/
If you want to know rectified voltage, this tool is amazing if you don't want to wreck your brain 😁
https://www.petervis.com/electronics guides/calculators/transformer-ac-to-dc/ac-to-dc.html
It calculates it based on diode Vf, so you can pinpoint more accurately and reduce heat output as much as possible.
https://www.petervis.com/electronics guides/calculators/transformer-ac-to-dc/ac-to-dc.html
It calculates it based on diode Vf, so you can pinpoint more accurately and reduce heat output as much as possible.
@voxxonline exactly, the output voltage is == transformer voltage * 1.4142 - (2 * diode forward voltage) ....
calculate the voltages based on your regulators plus the asking extra voltage ... when using LDO based (PSU2) the safe extra is +2V (also can be slightly less) 😉
calculate the voltages based on your regulators plus the asking extra voltage ... when using LDO based (PSU2) the safe extra is +2V (also can be slightly less) 😉
yeah it is good to have some margin, the heat makes the clock crystals to be Owen eated w/o aditional owen board hassle ! 🤣
Notice some well made R-Core could be lower than the Torroids or Ei-Core Power Traffo. the rule of 1.414 average often does not apply to them but with the marginn you are safe. Some prefer to have a unique power traffo with the number of secondaries needed with a fine adjustment of each winding made for the current needed by the load. I never found clear explanations about that and if someone has it will be appreciated 🙂 !
See curent as a thing that goes back to a secondary winding and sure you do not want to share a secondary with too much different load. Some to be sure applies : a secondary per load (could be expensive for true symetrical cirduits 😱
Notice some well made R-Core could be lower than the Torroids or Ei-Core Power Traffo. the rule of 1.414 average often does not apply to them but with the marginn you are safe. Some prefer to have a unique power traffo with the number of secondaries needed with a fine adjustment of each winding made for the current needed by the load. I never found clear explanations about that and if someone has it will be appreciated 🙂 !
See curent as a thing that goes back to a secondary winding and sure you do not want to share a secondary with too much different load. Some to be sure applies : a secondary per load (could be expensive for true symetrical cirduits 😱
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