2x18w Audio Amp and Valve preamp

[thebadtall]

Hello, today I recieved a kit (tda2030) from ebay, woke up in the afternoon ^^ and soldered it.
My intention is to use it as final amp, preamped by an older project of tube preamp..

The results of the preamp was very good. The results of the preamp driven to the tda2030 amp, was better than expected ! (for a $7 amp and $5 preamp !!!)

The power supply is just Lipo 11.1v Battery. No noise, no hiss.. just pure 512k mp3 !

1. The kit





2. Populating the pcb




3. Almost done





4. The heatsinks used to be 1 big heatsink (for pc-psu), but was cut to 5 pieces




5. The left and right channel tube preamp circuits. As you notice there is no pcb.
Since I hadnt the time to make a pcb, i just put p2p the matterials in a protoboard!
Valves are 12au7




6. The lipo batteries! Even small they can run for hours. Used also in my R/C projects!!

 

[BradtheRad]

Good job.

Listeners often say the audio quality sounds better when tubes (valves) are used in an amplifier.

Your post is dated May 2012 but it appeared in the recent posts.

 

[thebadtall]

you have a huge ram in your brain!
that is a charisma wich very smart people have!

many prefer the tube because of its special sound , wich apart from warmth has more charasteristics wich i cannot describe in words, maybe i will paint it!

but we all miss the point nowdayas because all sound sources are digital

 

[francolok]

Check here: **broken link removed**, this is a class D 30W BTL amplifier with FET preamp and speaker emulator for portable multifunction guitar Pre-Amp.
Bye

 

[thebadtall]

thank you for providing that information, but it is a completely different amp with different targets

 

[pued]

amplifier class A ,AB,D

 

[thebadtall]

this is AB class