Author Topic: Building the Tiny Giant amp  (Read 290837 times)

carlosfilipe

Re: Building the Tiny Giant amp
« Reply #1060 on: March 08, 2019, 08:36:25 AM »
Not forgotten, but having a hard time building it.  :icon_mrgreen:

Disassembled it and trying again...
Total newbie, willing to learn.

sevrien

Re: Building the Tiny Giant amp
« Reply #1061 on: November 08, 2019, 08:31:58 AM »
Am I correct?
When using a different voltage supply than 19,5V.

I need to adjust the resistance (1K original) connected to leg 1 (adjust)of the LM338?
Perhaps a trimpot to make it a bit easier?

greetings

potul

Re: Building the Tiny Giant amp
« Reply #1062 on: November 08, 2019, 09:38:38 AM »
As far as I know you don't need to adjust anything. The adjustment is needed if you want to provide a different voltage to the circuit (output from regulator)

the voltage should be:

Vout = 1.25 (1+R2/R1) = 1.25 (1+1000/120) = 11.6666

which does not depend on Vin if you get a high enough voltage.

FYI, I'm powering mine with 12v bypassing the regulator.