Chokes in PSU

diyman · 19th February 2004, 11:57 AM

Are chokes useful in the PSU for Class AB solid state amps?

ckt

hacknet · 19th February 2004, 12:04 PM

they should be.

chokes add a magic touch to every powersupply.

fscarpa58 · 19th February 2004, 12:22 PM

Hi diyman

In a PSU there are several places where to put a choke in.

Federico

NickC · 19th February 2004, 11:33 PM

Chokes are not usefull in class ab amps as they impede the change in current draw by the amp. One of the laws of chokes. Cant remember the terminology but the simple version current of the amp increase, choke tries to bring it back to a constant value./ They are usefull in class A amps where current is constant

Frank Berry · 20th February 2004, 07:32 AM

Chokes are useful in high voltage/low current applications such as for vacuum tubes.

mikelm · 20th February 2004, 07:49 AM

Chokes are also useful in high current/low voltage applications such as for Class A S/E solid state.

More current change needs less windings for same effect, therefore less interwinding capacitance therefore higher resonant frequency.

though these chokes will not small or light or cheap...

fscarpa58 · 20th February 2004, 05:13 PM

Hi

The right choke between the rectifier bridge and the first
cap. helps to reduce current peaks in the diodes and in the
trasformer.

Federico

19th February 2004, 11:57 AM	#1
diyman diyAudio Member Join Date: Nov 2001 Location: Malaysia	Chokes in PSU Are chokes useful in the PSU for Class AB solid state amps? ckt

20th February 2004, 07:32 AM	#5
Frank Berry diyAudio Member Join Date: Sep 2003 Location: Midland, Michigan	Chokes are useful in high voltage/low current applications such as for vacuum tubes. __________________ Frank

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19th February 2004, 12:04 PM	#2
hacknet diyAudio Member Join Date: Nov 2002 Location: sg	they should be. chokes add a magic touch to every powersupply.

19th February 2004, 12:22 PM	#3
fscarpa58 diyAudio Member Join Date: Nov 2003 Location: Genova, Italy	Hi diyman In a PSU there are several places where to put a choke in. Federico

19th February 2004, 11:33 PM	#4
NickC diyAudio Member Join Date: Dec 2001 Location: Earth	Chokes are not usefull in class ab amps as they impede the change in current draw by the amp. One of the laws of chokes. Cant remember the terminology but the simple version current of the amp increase, choke tries to bring it back to a constant value./ They are usefull in class A amps where current is constant

20th February 2004, 07:49 AM	#6
mikelm diyAudio Member Join Date: May 2003 Location: England	Chokes are also useful in high current/low voltage applications such as for Class A S/E solid state. More current change needs less windings for same effect, therefore less interwinding capacitance therefore higher resonant frequency. though these chokes will not small or light or cheap...

20th February 2004, 05:13 PM	#7
fscarpa58 diyAudio Member Join Date: Nov 2003 Location: Genova, Italy	Hi The right choke between the rectifier bridge and the first cap. helps to reduce current peaks in the diodes and in the trasformer. Federico

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