Hello,
I'm using home made DC power supply, based on casual LM338T schematics http://www.circuitstoday.com/wp-content/uploads/2009/08/13v5a-adjustable-powersupply-using-lm338.jpg
When connected to a few amps, for example, tube pedal/booster and guitar amp, it's heard the noise, hum for sure.
Measured with oscilloscope, and what I've got: Very small ripple. 100 Hz. By the way, one square = 0,01V. Tried to change C1 into 10k uF (4,7k was the first). Nothing changed. Any ideas how to remove it?
I'm using home made DC power supply, based on casual LM338T schematics http://www.circuitstoday.com/wp-content/uploads/2009/08/13v5a-adjustable-powersupply-using-lm338.jpg
When connected to a few amps, for example, tube pedal/booster and guitar amp, it's heard the noise, hum for sure.
Measured with oscilloscope, and what I've got: Very small ripple. 100 Hz. By the way, one square = 0,01V. Tried to change C1 into 10k uF (4,7k was the first). Nothing changed. Any ideas how to remove it?