Yabancı ziyaretçiler için ingilizcesinide yazmak istedim
The English Translation : SIMPLE LINE (MAINS) FILTER
This circuit '' the simple mains filter '' is simplier than the circuit that I gave
up side of the page.Because of its making process and component avaiability.For any hifi
sound system, the hum and pops or motorboating are the main problems, to prevent this,
this circuit ideal and called in general Mains filter.
Fistly, there was used a VDR at In , to stable the mains current and voltage not to
change in case of any voltage up and downs.Its values are chosen 250V and 20mm Size
for minimal conditions.This component changes behaviour to a mains condition, for instance;
when the voltage rises, the VDR shunts and the current passes to death lead (earth),so the
our equipment be safe.
On the other hand, the line(mains) filter coil filters the unwanted frequences by the help of
the 100nf 630V capasitors and 470K resistor.
By the way, the X.A fuse can select for your work, as a start for an amplifier supply, a 2-3A
may be a good choice.When placing them on a PCB , the ways must be wide and there must be enough
space between them.
As a result, this circuit is good for a mains filtering, but must be remember that we are
working on High Voltage and it can kill us, so be carefull.
Take it easy guys,and if is it possible I am waiting your backups.
P.S: General advice , if you add 100n bypass capasitors between supply pins in any circuit, it helps to
prevent the hum.The ideal places to place them are the among of transformer and bridge, another one the
near of the IC supply inputs.
The circuit is quoted.Only the translation is made by me.Take it easy, everyone.
*Legionaire*
Only registred user can see link on this forum! Registred or Login on forum! |