We had a made a amplifier using BJT and it does work in breadboard, then we transferred it in a pcb,but any sound will not be heard,
My question is, is there a right thing in designing for the amplifier??

 

Murphy's law in action--prototypes work--production does not work

Electrons never make mistrakes!

Find your error--recheck--do not make assumptions--they can get you into trouble

 

Audio amplifiers usually do not suffer from mysterious circuit board probelms. You have simply made a mistake and you must look closely until you find it.

 

We had a made a amplifier using BJT and it does work in breadboard, then we transferred it in a pcb,but any sound will not be heard,
My question is, is there a right thing in designing for the amplifier??

Can you post a copy of the amp here?

hgmjr

 

Audio amplifiers usually do not suffer from mysterious circuit board probelms. You have simply made a mistake and you must look closely until you find it.

I'm sorry about that, I really thought its our connection is the problem but my classmate said" oh your Rc is far from collector of the transistor", so i asked here if its true or not,

Can you post a copy of the amp here?
hgmjr

you mean the pcb design?

 

I think we are having a language problem.

We need a schematic of the circuit...and photos of the circuit board would help a lot. Only then can we do anything besides guess.

 

you mean the pcb design?

Actually, I was referring to the schematic of your amplifier.

hgmjr

 

Measure the DC voltages of your amplifier with no signal and post them on your schematic.