TDA2003 8 watt practice amp -- old school blues -- I built it

[jmastax]

hey dude, could you help me out.... i built the exact circuit from the schematic yet whenever i plug it into my guitar. the amplifier wont pick up any thing as soft as 2 strings... and when they do get picked up i only here quick/rough noises... any idea where i coulda gone wrong?

[wnorcott]

@jmastax I will try brother but it is not much detail to go on. Measure the voltage between pin 5 (DC +) and pin 3 (Ground) it should be at least 15 volts. If you are trying to run it on 9 volts or something like that it will not work properly.

Also make sure that C4 which is a 1000 uF output capacitor has the (+) lead of the cap pointing towards output pin 4.  This is a big, polarized cap and if you soldered it in backwards you will definitely kill the sound. Hope this helps.

Bill

[wnorcott]

@cumesoftware Thanks Brother! Glad you like it listen to my other stuff too!

Bill

[mistermarijn]

i'm gonna make a audio amp with a TDA 2003 and a 10watt speaker with bass and treble and volume!! i make a video when its done

[mesjemichal]

bajer

[diz52nd]

Sounds great. Good distortion for solid state.

[hamslammer69]

horrible attention to detail... if you went through all that trouble building it, why not fix the grill and lose the ugly tape

[Burnoutsarestupid]

00:37 love it!

It's just the Umble in front? Did you use J201 jfets?

[wnorcott]

Yes that is the Umble and I used J201 JFETS in the Umble.

Bill

[echoceleste]

I built one too with a 6in 6W speaker. I use an acoustic with magnetic soundhole pickup. Is the recording using the built-in speaker only? It sounds great

[wnorcott]

Thanks for listening! Yes it is the amplifier you see in the video with a microphone in front of it, just like you see in the video.

[bobmango54]

that's badass

[leftystrat62]

What a great sounding amp;throw some tolex on that bad boy and you'll be styllin'.

[fditube]

great!

[wnorcott]

To listen in STEREO type &fmt=18 at the end of the URL

or just click on the link in the More Info section

Bill

[sfdog1369]

Sweet Bill Rock On Bro!!

[wnorcott]

Thanks for listening Dog I had a lot of fun building this little amp and use it all the time.

Bill