Power Amplifier OTL 30W by IC TDA2030 +Transistor

[Alexis1989]

salamat po master tony
ilan po ba ang wattage n2 ngayon?

[tony]

same pa rin.....hindi naman nabago ang rail mo....

[Alexis1989]

maraming salamat po sainyo working na po!!

[tony]

good job......+1

[Alexis1989]

tanong ko lang po
I used headphone jack for the input, the connection are in ground and left no connection in right
kulang po ung tunog, is it possible to short the left and right pin para makuha ko ung kumpletong tunog?

[Disabled]

magmimix ung signal, mag series ka ng mga 3.3k or 33k ba un? nakalimutan ko
on each channel

[Alexis1989]

parang ganito po?

[Disabled]

yes, test ka lang ng 3.3k or 33k, nkalimutan ko na eh

[elmertronics]

14 watts na lang ba ang output power nito?. .'yon kasi nkalagay sa datasheet niya. .

[tony]

14 watts na lang ba ang output power nito?. .'yon kasi nkalagay sa datasheet niya. .

yes, at Vss of +/- 19.......this means that an unloaded supply of +/-22volts which is maximum for this device will drop when delivering rated power into 4ohm....

you will not hear the difference betwen a 30 watt or 14watt amps when playing music...

you will see the difference when you test it under load using sine waves....

[Johannah Aleksandria]

parang ganito po?

220ohms lang gamitin mong resistor, wala na nmang preamp na kasunod. masyadong hihina na yung amp mo sa 1k pataas.

[tony]

parang ganito po?

your midband gain is ~30000/3300 or ~ 9.1 say 10.....
for an output of 14 watts into 4 ohms, output voltage is 7.5v rms....

now your 24 volt rail gives you 12volt peak(assumes no voltage lost in the output trannies) or 8volts rms...
thus we can see that with the rail voltage as shown, it will not be possible to get 14 watts output...
another thing to consider is the voltage drop on the rail once big current is drawn from the supply...

therefore looking at the schematics alone does not give you the whole story....
we have to consider the completed amps with its power supply to find out exactly what the power output will be...

[tony]

for an output of 14 watts into 4 ohms, output voltage is 7.5v rms....

let us accept that this is true for the moment...

to get this output voltage, the input voltage then needs to be 7.5v/10 or 750 mV.....

now, today's gadget can give line outputs of up to 2.5 volts rms easy...

so that the 33k and 50 k input resistance then gives an input signal at maximum pot position of Vin = (33k/83k)2.5v = 993mV rams....

therefore the circuit as shown should suffice...

[RhedN14]

Alexis1989 san po ilalagay ung potentiometer?paki explain po sorry noob lng dipa graduate eh 3rd year plang

[drin20]

Alexis1989 san po ilalagay ung potentiometer?paki explain po sorry noob lng dipa graduate eh 3rd year plang

sa input ng amplifier