HR Noise Epi. 3
Last Updated on May 14, 2020
So I think coil singing is hum noise.
I target the ceramic capacitor acoustic noise (CCAN) in the power supply.
By the way, the problem is also come from the high output impedance of the electric guitar. At the point of the outlet of the guitar, we can change the impedance as my ukulele piezo pickup.
Transformer, not transfer tough. It's the alpha version.
Let's make and test it...