I have just found this schematic for the Borbely EB-802/243 powersupply.
It's a wideband, lownoise powersupply designed for audio circuits.
Has anyone built thes unit? And can anyone tell me what the values of the components should be?
I only know, that r3=2.49K and R1=1K for the output to be +/- 24 Volts. Other outputs can be obtained by the formulae:
6.9x(R3+R1)/R1
The reference diodes is LM336Z-5.0.
Opamps could be NE5534.
Any help to get?
Best,
Peter
It's a wideband, lownoise powersupply designed for audio circuits.
Has anyone built thes unit? And can anyone tell me what the values of the components should be?
I only know, that r3=2.49K and R1=1K for the output to be +/- 24 Volts. Other outputs can be obtained by the formulae:
6.9x(R3+R1)/R1
The reference diodes is LM336Z-5.0.
Opamps could be NE5534.
Any help to get?
Best,
Peter
Attachments
If you have to ask............
RTF*D
http://www.audiokits.com/downloads.asp
Or you could buy a kit from these folks or Borbely Audio I would imagine. Tell them Walt J. referred you. **
Just don't tell PA about it.
BTW There are this cool new things called search engines, but perhaps you might not have heard about them.
* That's Formal you suspicious moderators
** Sorry Jan the devil made me do it....
RTF*D
http://www.audiokits.com/downloads.asp
Or you could buy a kit from these folks or Borbely Audio I would imagine. Tell them Walt J. referred you. **
Just don't tell PA about it.
BTW There are this cool new things called search engines, but perhaps you might not have heard about them.
* That's Formal you suspicious moderators
** Sorry Jan the devil made me do it....
Borbely PSU...
Very funny....
www.audiokit.com is where I got the schematic from. They may have a reason not to put values on it...;-)
I have another Borbely PSU design I can use instead.
Look here - free to use high quality PSU:
Very funny....
www.audiokit.com is where I got the schematic from. They may have a reason not to put values on it...;-)
I have another Borbely PSU design I can use instead.
Look here - free to use high quality PSU:
Attachments
Both designs are based on Sulzer's supply, as far as I know.
The most modern version (Walt Jung's) is different because of the chips he used and because he added a feedback from the part you were powering. That is you should only use one supply for each chip you were powering.
From the photos I have seen, I think the small supply pcb Audiokits sells is based on Jung's design, but this is only a guess.
Carlos
The most modern version (Walt Jung's) is different because of the chips he used and because he added a feedback from the part you were powering. That is you should only use one supply for each chip you were powering.
From the photos I have seen, I think the small supply pcb Audiokits sells is based on Jung's design, but this is only a guess.
Carlos
Get a better regulator
You are better off going to Andy's site and getting a reg from him. They are more advanced than Borbebly's, have high quality PCBs with plated through holes, and cost less.
I don't understand why Borbely uses a FET as a pass transistor, anyway. Walt Jung had the same question when I asked him about it.
ALW Audio
You are better off going to Andy's site and getting a reg from him. They are more advanced than Borbebly's, have high quality PCBs with plated through holes, and cost less.
I don't understand why Borbely uses a FET as a pass transistor, anyway. Walt Jung had the same question when I asked him about it.
ALW Audio
We could tell you but we would have to kill you to keep it secret
"I don't understand why Borbely uses a FET as a pass transistor, anyway. Walt Jung had the same question when I asked him about it."
Erno knows...........
I know......
Andy knows.........
I bet even Walt now knows........
The open loop output impedance of the Mosfet is much higher than a bipolar at the same quiescent current which is a drawback rsulting in higher output impedance, but the Mosfet has the real advantage of ..........
I wonder who else knows?
"I don't understand why Borbely uses a FET as a pass transistor, anyway. Walt Jung had the same question when I asked him about it."
Erno knows...........
I know......
Andy knows.........
I bet even Walt now knows........
The open loop output impedance of the Mosfet is much higher than a bipolar at the same quiescent current which is a drawback rsulting in higher output impedance, but the Mosfet has the real advantage of ..........
I wonder who else knows?
Re: Borbely PSU...
I'm sorry, the version I downloaded EB-802-243-complete.PDF awhile back had a parts list. Is that not the case now? Have you tried Emailing Mr. Borbely?
http://www.borbelyaudio.com/
jazzpeter65 said:
I'm sorry, the version I downloaded EB-802-243-complete.PDF awhile back had a parts list. Is that not the case now? Have you tried Emailing Mr. Borbely?
http://www.borbelyaudio.com/
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