Is it possible to optimize the board for 12v / 5A at build time? I apologize if this has been addressed over the 58 pages of discussion!
The answer has been there several times, but also in the last 3 posts before yours.
You have to connect several of these filter boards in parallel, in your case 2-3 pieces. Alternatively, you can recalculate the filter for a higher load.
You have to connect several of these filter boards in parallel, in your case 2-3 pieces. Alternatively, you can recalculate the filter for a higher load.
Yes, not kludging multiples together or taking up more space, but rather loading the board with the appropriate lower voltage / higher current parts from the beginning as a 12v / 5A or thereabouts version. I would like to recalculate the filter for a higher load at lower voltage but would also like to know if anyone has already done this and how that was arrived at.
The issue with higher currents is likely to be the non-linearity of the ferrite core inductor(s)
This is not a matter of tinkering together, but of connecting several units in parallel to distribute the load, not an unusual procedure. The components used have tolerances close enough so that no problems arise.
By the way, the suggestion for this came from the developer and would be implemented more often.
As far as I know, no one in this thread has yet calculated a new filter for higher currents.
I am also not aware that @Mark Johnson continued the development of more powerful filters, see also post #1.119.
But @Mark Johnson introduced a new filter in this thread -> AmyAlice: DC filter for SMPS, using 2 feedthru capacitors + SMD assembly. max 3A & max 48V
And here's the thread about it from @schultzsch A2CMx: AmyAlice DC filter and cap multiplier for SMPS.
Of course, if you calculate a filter with higher performance, it would be nice to share it with the community. I think many people would be grateful if you designed it up to a voltage of 48 volts.
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To be sure
If I want to filter the negative side of a dual supply, I have to rotate polarity of D1,C1,C2 ?
Thx for help
If I want to filter the negative side of a dual supply, I have to rotate polarity of D1,C1,C2 ?
Thx for help
Have you read the more recent thread, about the new and improved and all-singing, all-dancing follow on project, AmyAlice ? (Forum link) It even includes Answers To Frequently Asked Questions. Take a quick look at question number two.
Just completed my build + murata coil. Super easy and noticeable improvement 🤓 in my ACA Mini.
Steampunk SMPS DC Filter P089ZB x 4 - for Fosi V3. The difference is incredible. This is a completely different sounding amp all the way.Thank you Mark Johnson. 😉
Happy Thanksgiving to those who live US Stateside 🦃
Best wishes to all
Best wishes to all
Here’s today’s record for Most-MarkFilters-in-one-implementation🙂!
Beneath the ratsnest (it was quickly cobbled together to compare SMPS vs a Salas UBiB-powered version) are eight rails with seven filters (eighth rail powers a muting relay). Powering a JLsounds FIO/AD1865 combo. PS boards I did years ago for another project. Thanks again,Mark, for the filter - it continues to make a difference.
Beneath the ratsnest (it was quickly cobbled together to compare SMPS vs a Salas UBiB-powered version) are eight rails with seven filters (eighth rail powers a muting relay). Powering a JLsounds FIO/AD1865 combo. PS boards I did years ago for another project. Thanks again,Mark, for the filter - it continues to make a difference.
Hello,
sorry if I ask before reading the details about the SMPS DC filter, I am in a rush to order some stuff off of DIY audio store as I have a limited timeframe, I was wondering if adding this filter to my BA3 based preamp would add any benefit provided, if I recall correct, mine being run with about 30-31V.
Grazie
sorry if I ask before reading the details about the SMPS DC filter, I am in a rush to order some stuff off of DIY audio store as I have a limited timeframe, I was wondering if adding this filter to my BA3 based preamp would add any benefit provided, if I recall correct, mine being run with about 30-31V.
Grazie
Sorry, for some reason I can't edit my above post, my BA3 preamp uses Sigma22 PSUs outputting about 30V
Sigma22 is a linear, dual-rail supply. P089ZB is designed for single-voltage switch mode PSU.
Could you make it work? Yes, but you'd need two filters and one would need to be set up for negative voltages.
Would it make much difference? Perhaps, however the filtering of P089ZB is intended for high-frequency noise that SMPS make, not a linear PSU's noise.
Editing - There is a 30 minute window for editing a post in the thread, it locks after that. Looks like you were just a minute or two too late.
Could you make it work? Yes, but you'd need two filters and one would need to be set up for negative voltages.
Would it make much difference? Perhaps, however the filtering of P089ZB is intended for high-frequency noise that SMPS make, not a linear PSU's noise.
Editing - There is a 30 minute window for editing a post in the thread, it locks after that. Looks like you were just a minute or two too late.
Pearl 3 is also powered by a linear supply and amongst the quietest phono preamp I've ever used.
P089ZB is for a project powered by a SMPS "wall-wart", and it's excellent for that.
P089ZB is for a project powered by a SMPS "wall-wart", and it's excellent for that.
@6L6 I owe you a coffee and a croissant when you come my way ;-)
p.s. getting F4 boards and MOSFETs, might make a bridged mono block and convert mine into a such and since my BA3 preamp already has a second Sigma22 PSU in the chassis might as well turn it into balanced, oh well, restored an old Marantz 300DC it does really rock the old and big JBLs
p.s. getting F4 boards and MOSFETs, might make a bridged mono block and convert mine into a such and since my BA3 preamp already has a second Sigma22 PSU in the chassis might as well turn it into balanced, oh well, restored an old Marantz 300DC it does really rock the old and big JBLs
I hope some day I will be able to accept your offer. 🙂 🙂 Thank you. ☕
You will LOVE F4, it's a fascinating amplifier and gives a chance to experiment with many different gain stages. It also sounds excellent.