Tiny Giant Pedalboard Amp

[ClippyTheDiode]

Here is a Tiny Giant build I just completed. Managed to fit it into a 1590A enclosure. Just powered it up and it is all working. Now to see how hot it gets.

 

[Guilherme Collateral]

It's already red hot!

 

[ClippyTheDiode]

Holy crap that is loud! I reduced the 1k resistor down to 680 which dropped the 11.6V regulator output to 8.29V. Now I can actually get the volume knob to 9 o'clock, and that is plenty loud for my livingroom. Before I was down at like 7:30, or 8. I am running into a 4 ohm 2x10" cabinet.

Currently feeding it 12 volts instead of the recommended 18V. But the amplifiers are all behind the regulator as long as I have enough headroom for the regulator to run it's ok. Running it off of my lab power supply @12V it was drawing about 500mA while playing a chord (volume @ 9o'clock).

So far case is still cool to the touch.

 

[ClippyTheDiode]

Ok, it didn't like that last mod. I noticed when I dropped regulated voltage I started getting distortion in the output. So I set the output voltlage back to the stock value of 11.6V with a 1k resistor. Now no more distortion, nice and clean sound again. I am back to running it on 18V input as well.

So looking for a different solution to make it a bit quieter, I added a 5k1 resistor in series with pin 3 of the pot. This helped get more usable range out of the pot and limited overall output.

Also upgraded the knob and added a decal.