250 V PSU help

Green77 · 25th September 2008, 06:21 AM

Hi.

I'm thinking of building a active tone control and haveing a little problem with the PSU. Anyone have a design that have B+ 250 V?
I have a transformer with sec 200 V AC..maybe i can use that one?

Thanks.

//Daniel

audiowize · 25th September 2008, 06:53 AM

UF4007 diode bridge, 100uf cap, 2.5k resistor, 100uf cap, 2.5k resistor, 100uf cap.

You should have about 255v at that last 100uf cap assuming you have a 2 channel tone control drawing around 5ma. For one channel, change both the resistors to 5k (or a little above that, 5.1/5.2, something like that) and you should be pretty close.

-Paul

Green77 · 25th September 2008, 04:01 PM

Thanks

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25th September 2008, 06:53 AM	#2
audiowize diyAudio Member Join Date: Aug 2005	UF4007 diode bridge, 100uf cap, 2.5k resistor, 100uf cap, 2.5k resistor, 100uf cap. You should have about 255v at that last 100uf cap assuming you have a 2 channel tone control drawing around 5ma. For one channel, change both the resistors to 5k (or a little above that, 5.1/5.2, something like that) and you should be pretty close. -Paul

25th September 2008, 04:01 PM	#3
Green77 diyAudio Member Join Date: May 2007 Location: MJOLBY	Thanks

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