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Old 26th January 2005, 03:50 PM   #1
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udip's Avatar
Join Date: Oct 2004
Location: Israel
Default Power supply regulators


I have a question regarding preamp power supply.
I'm using a rec. diode bridge followed by big capacitors,
and then 317/337 regulators. Now, I'v got to pcbs:
one for the supply, and the other for the preamp itself.

It may seem obvious to some, but:
Idealy, do the 317/337 should be on the preamp pcb?
or should I put them on the supply pcb?
(The distance between the two pcb's is something like 30cm)

Help whould be appreciated.


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Old 26th January 2005, 04:00 PM   #2
Did it Himself
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Location: Gloucestershire, England, UK
Keep all the power supply bits on one board. Just make sure you decouple any power supply pins on op-amps in your pre-amp.
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
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Old 4th February 2005, 06:57 AM   #3
d3imlay is offline d3imlay  United States
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Location: Ohio
I agree keep 'em separated, especially keep the xfmr away from the preamp. Follow the data sheets for input/output caps for stability.
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