Quick Power Supply Question

kbeist · 21st December 2010, 03:17 PM

I have (2) PowerOne F24-12-A International Series power supplies.
1 of which is being used as my BenchPS and the other has a toasted TO-3 HBR along with the associated trace. Repair is not impossible as I also have the schematics.

Is it possible to connect the OP in series to obtain a +/-24V ultra smooth reg PS? Or would another (puffsst) occur?

I have a 38VCT/10A transformer rated @10A and the associated 30Kuf caps to replace the BenchPS, so no worries there.

I await the replies of diy PS guru's.
Thanks.
K

sawreyrw · 21st December 2010, 05:37 PM

Assuming the outputs are isolated they should work in series, but I would put reverse diodes across the outputs to avoid any start up issues.

I don't know why you would think they would be "ultra smooth".

kbeist · 21st December 2010, 06:17 PM

Being smoother than What I currently have.

From what I was taught a few years back (i could be a bit rusty on this tho'), filtering a DC supply seems to make sense. Intill the Law of Diminishing Returns comes to haunt ya'.

Personally I feel that PowerOne designed these World PS's rock solid in the 'Way Back Machine' (i.e. 1991ish? dated schema's) and they are still working with no servicing. The burnt one is my fault, otherwise it would still be running just as the other.

Currently using: (2X10Kuf 63V Nichi)(no regulation).
And These puppies use (3x13Kuf 50V Vish/Spra)(regulation using the SGS 130-10287/98732 and a TIP-29A chip) in each supply.

I absolutely NEED (REQUIRE) a rock solid/stable/known supply.

kbeist · 21st December 2010, 06:21 PM

Oh, and Thank you extreemly much on the use of the diodes!!! I will do that most definitly!!

kbeist · 21st December 2010, 06:26 PM

I will post the partial schema's for ya.

kbeist · 21st December 2010, 06:39 PM

Hope this works.

kbeist · 22nd December 2010, 03:09 PM

Ok. One more question.

This is just a thought as I am no EE.

With 2 diodes in parallel what is dramaticly changed? (other than board realestate.) rV/rI/Pd?
And if there is a dramatic change (> +/- 10%) at what point could the law of DR take place??

[and yes I am 'nuke-ing it a bit here. As I have sort-of misplaced that there 'I-Believe' button of mine.]

I really appreciate all the help from everyone.
K

Paul30024 · 8th February 2011, 09:03 PM

Kbeist,

Do you have the complete schematic that you can email me?
email to sale.jsb@cfw.com.

Thanks
Paul

21st December 2010, 03:17 PM	#1
kbeist diyAudio Member Join Date: Sep 2010 Location: Grove, Ok.	Quick Power Supply Question I have (2) PowerOne F24-12-A International Series power supplies. 1 of which is being used as my BenchPS and the other has a toasted TO-3 HBR along with the associated trace. Repair is not impossible as I also have the schematics. Is it possible to connect the OP in series to obtain a +/-24V ultra smooth reg PS? Or would another (puffsst) occur? I have a 38VCT/10A transformer rated @10A and the associated 30Kuf caps to replace the BenchPS, so no worries there. I await the replies of diy PS guru's. Thanks. K

22nd December 2010, 03:09 PM	#7
kbeist diyAudio Member Join Date: Sep 2010 Location: Grove, Ok.	Hmmmm.. Ok. One more question. This is just a thought as I am no EE. With 2 diodes in parallel what is dramaticly changed? (other than board realestate.) rV/rI/Pd? And if there is a dramatic change (> +/- 10%) at what point could the law of DR take place?? [and yes I am 'nuke-ing it a bit here. As I have sort-of misplaced that there 'I-Believe' button of mine.] I really appreciate all the help from everyone. K

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21st December 2010, 05:37 PM	#2
sawreyrw diyAudio Member Join Date: Apr 2006 Location: Minnesota	Assuming the outputs are isolated they should work in series, but I would put reverse diodes across the outputs to avoid any start up issues. I don't know why you would think they would be "ultra smooth".

21st December 2010, 06:17 PM	#3
kbeist diyAudio Member Join Date: Sep 2010 Location: Grove, Ok.	Being smoother than What I currently have. From what I was taught a few years back (i could be a bit rusty on this tho'), filtering a DC supply seems to make sense. Intill the Law of Diminishing Returns comes to haunt ya'. Personally I feel that PowerOne designed these World PS's rock solid in the 'Way Back Machine' (i.e. 1991ish? dated schema's) and they are still working with no servicing. The burnt one is my fault, otherwise it would still be running just as the other. Currently using: (2X10Kuf 63V Nichi)(no regulation). And These puppies use (3x13Kuf 50V Vish/Spra)(regulation using the SGS 130-10287/98732 and a TIP-29A chip) in each supply. I absolutely NEED (REQUIRE) a rock solid/stable/known supply.

21st December 2010, 06:21 PM	#4
kbeist diyAudio Member Join Date: Sep 2010 Location: Grove, Ok.	Oh, and Thank you extreemly much on the use of the diodes!!! I will do that most definitly!!

21st December 2010, 06:26 PM	#5
kbeist diyAudio Member Join Date: Sep 2010 Location: Grove, Ok.	I will post the partial schema's for ya.

8th February 2011, 09:03 PM	#8
Paul30024 diyAudio Member Join Date: Feb 2011	Kbeist, Do you have the complete schematic that you can email me? email to sale.jsb@cfw.com. Thanks Paul

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