Recent content by Lira

I think the capacitor of 470uF in the VBE multiplier is causing the inicial DC, I lowered it to 47uF and it is better, but i always use a dc protect board with delay on the outputs. One thing that i noticed, is that this amplifier absolutely doesn't work well with 2 ohms output and 50V its a bit...

Sure! Here it is. If you find something please tell me ok? Best Regards Lira

Here is an example using VBE Multiplier: You can use this small board: and just put this instead of the 3 diodes, and replace the 470uf cap with a 100uf cap (C7 on the Schematic). Best Regards Lira

Update: It is finally stable. Here is the mods: This schematic is stable in simulation, but generates a lot of distortion in real life: First it will only be stable with 2v the collector of the two driver transistors (bd911, bd912 or tip41,tip42). The gain is set in a crazy way on the original...

Hi sir Vedmitra, yes, but no good news yet. What i found out is the first units of this amplifier i used bd911 and bd912 and now i'm using tip41 and tip42, and also, i used the bc327 instead of bc556, using only 2 diodes for thermal compensation is more stable and generate less heat, and, to top...

Hi, This time I drawed a bridge circuit for the TDA2050. Carefull on building this circuit, the ICs get a little warm even without signal, so, before you start testing, mount it in a heatsink. Every bridge configuration using tda20xx gets a little warm without signal, so, thats quite normal...

Hi Everybody! It's been a long time that i don't show up, but here it is, an amplifier for starters with a great quality based on the cheap and popular TDA2050. There is a resistor and a capacitor called "C" and "R", you can use a 2.2R resistor and a 470nF Capacitor. This board can...

Hi, recently i bought a PCB on the e-bay, it's for TDA7293. Post your comments!

It's a 3 years old project by Carlos, that has a very good response for Bass and SubBass, it has a peak on 40hz, that is ideal for subwoofers. I still have the latest schematics, and the gerber files. Despite that i don't have tested yet the Dx Blame MKIII-HX, is the best amplifier by the DX...

Choose the next chipamp that you like to be posted here in the forum.

Here is it! Look at the size of the magnetic assembly!

Its a 10' subwoofer with a 51,60mm diameter coil made of kapton with 4+4 ohms for 200W Later I´ll post some tests on youtube.

Here is a small but good amplifier. Its a project that a picked up somewere in the internet, I don´t know who is the author but i like very much this amplifier. Well its based on the TDA2052, It Has PSU integrated.