Require advise on tda2050 this schematic

[pra3718]

Which is the good schematic attached schematic or datasheet.

 

[Dxvideo]

I think you will need the following modifications to increase this amps sound performace;
- Ommit the 0.1u, 10K, 10K and 2.2u on NFB circuit..
- Increase the C2 value (47 or 100u-bipolar!) to increase the bass response..
- Add a 680R resistor after C1 in series, to protect amplifiers LTP base..
- Increase C1 value (4u7 MKP, not elko)
And a final word, if you dont have TDA2050 currently then use LM1875 instead of it..

 

[pra3718]

Thank you,

Infact the basic amp I can build now. I am looking for some best sound like WARM, CLEAR TONE, SONIC etc.,

Regards.

 

[pra3718]

@Dxvideo, I was trying to boost bass & treble without adding active/passive crossover.

 

[Dxvideo]

Then youre on the right way... So keep the feedback components anyway.
However my advices about bass improvement (about C1 and C2 values) are still valid..

 

[shravanth]

what speakers can we use for tda2050

 

[Osvaldo de Banfield]

I think you will need the following modifications to increase this amps sound performace;
- Ommit the 0.1u, 10K, 10K and 2.2u on NFB circuit..
- Increase the C2 value (47 or 100u-bipolar!) to increase the bass response..
- Add a 680R resistor after C1 in series, to protect amplifiers LTP base..
- Increase C1 value (4u7 MKP, not elko)
And a final word, if you dont have TDA2050 currently then use LM1875 instead of it..

I make several amplifiers like this, but with TDA2006 split supply. I added a coil of about 50 microhenry in parallel with 4.7R between IC output and zobel network and speaker to prevent high frequency oscillation in case of long wires to speaker. The set is working fine since 1995 to this date.

 

[shravanth]

what speakers can i use for tda2050
watts-
size-
impdence-
plz help me

 

[Osvaldo de Banfield]

what speakers can i use for tda2050
watts-
size-
impdence-
plz help me

Impedance= 4r or more
Power: depends on power supply (Psp > VCC *VCC / RL)
Size: depends on your personal taste.

Good luck.

 

[kuldeepsingh]

TDA2050 is a decent powerful chip, it can easily drive 3-8 ohm speakers at 30 Watts average.

 

[andrewlebon]

TDA SERIES

check this one its NORAZMI S design

 

[shravanth]

if i use 18v/2amp powersupply then how many watts spearker can i use?

 

[kuldeepsingh]

crude calculations -> 18*2 = 36VA ~ 36 W, efficiency of amp ~ .6
speaker power = 36*0.6 = 21.6 W
2 speakers means, approx 10.8 W each

 

[shravanth]

i have two 20w 8ohm 6'' spks can i use in parallel

 

[kuldeepsingh]

You can use, but if u want good power output, get a 18-0-18V, 6-7 A transformer. 18-0-18 v after rectification and filtering will give ~ 25-0-25 V, it will give approx 35 W power to each speaker

 

[shravanth]

i am not using dual power supply i am using single

 

[kuldeepsingh]

then use 18-0-18 transformer in 36-0 configuration. (simply use the 18 18 wires, don't use 0 line center tap wire). basically you need a higher voltage and more current to deliver output.
But first try with the existing power supply and speakers, i you are satisfied with sound, its OK.

 

[shravanth]

An externally hosted image should be here but it was not working when we last tested it.

what about this circuit i am using this power supply is 18v/2amps

 

[kuldeepsingh]

The circuit is OK. But output power depends on power supply capacity.

but for future, try to use dual supply circuit. this circuit is mainly for battery powered amplifier.

 

[shravanth]

ok