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Old 6th October 2012, 01:49 AM   #7491
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Quote:
Originally Posted by Algar_emi View Post
Hi. Since the official R3 PCB was no longer available, I did my own
This looks like transformer - choke - rectifier - cap,

Guys. This isn't what we talked about. We want transformer - rectifier - cap - choke - cap.
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Old 6th October 2012, 03:09 AM   #7492
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Old 6th October 2012, 03:22 AM   #7493
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Holger, Algar designed the pre regulator for the pre regulator so to say. I posted in 7490 that i will add chokes and caps.
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Old 6th October 2012, 03:25 AM   #7494
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I think the use of the common mode chokes is correct in this design but for ripple rejection we need the bigger sized stuff from Hammond or Lundahl. Those can be put behind Algars
PCB or could be integrated in a bigger PCB.
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Old 6th October 2012, 09:09 AM   #7495
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Quote:
Originally Posted by Holger Barske View Post
This looks like transformer - choke - rectifier - cap,

Guys. This isn't what we talked about. We want transformer - rectifier - cap - choke - cap.
Wasit not traffo - common mode coke - rectifier - cap - coke - cap ?

Last edited by Bksabath; 6th October 2012 at 09:11 AM.
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Old 6th October 2012, 09:16 AM   #7496
kamis is offline kamis  Serbia
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Quote:
Originally Posted by Bksabath View Post
Wasit not traffo - common mode coke - rectifier - cap - coke - cap ?
Why not use John Curl topology? He attached it in another thread.
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Old 6th October 2012, 12:32 PM   #7497
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The common mode chokes suppress only HF/RF. For ripple rejection and smoothing we need big coils that work in the audio range.
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Old 6th October 2012, 01:30 PM   #7498
MiiB is offline MiiB  Denmark
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To me theres no need to target ripple rejection.. HF is the primary.....

The Paradise has extreme ripple rejection.... all is effective shielded by high impedance current-sources/mirrors. poison is the Hf, that can bleed through stray capacitance.
Curls schematic seems rather fine to me or at least a good start. ut no need for the LM's as the Shunt is already onboard..:9

Last edited by MiiB; 6th October 2012 at 01:43 PM.
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Old 6th October 2012, 01:35 PM   #7499
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I agree, there is no need for extreme pre regulation but it may be fun. Some may hear a difference, some not, one never knows.
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Old 7th October 2012, 12:40 AM   #7500
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Quote:
Originally Posted by kamis View Post
Why not use John Curl topology? He attached it in another thread.
Sorry that to me is straight LM317 and a common mode coke classic straight out of book

Why do we have to put a name on it?

In other words....

Besides one may need to step back and see all the work FDW did on the suply before mentioning LM317

Last edited by Bksabath; 7th October 2012 at 12:44 AM.
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