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Chokes in PSU
Chokes in PSU
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Old 19th February 2004, 11:57 AM   #1
diyman is offline diyman
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Default Chokes in PSU

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

ckt
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Old 19th February 2004, 12:04 PM   #2
hacknet is offline hacknet  Singapore
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they should be.

chokes add a magic touch to every powersupply.
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Old 19th February 2004, 12:22 PM   #3
fscarpa58 is offline fscarpa58  Italy
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Hi diyman


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


Federico
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Old 19th February 2004, 11:33 PM   #4
NickC is offline NickC
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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
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Old 20th February 2004, 07:32 AM   #5
Frank Berry is offline Frank Berry  United States
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Chokes are useful in high voltage/low current applications such as for vacuum tubes.
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Old 20th February 2004, 07:49 AM   #6
mikelm is offline mikelm  England
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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...
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Old 20th February 2004, 05:13 PM   #7
fscarpa58 is offline fscarpa58  Italy
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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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