TzeYang
500+ Head-Fier
- Joined
- Mar 19, 2006
- Posts
- 960
- Likes
- 10
So I built a portable amp with push pull buffers, three channel and with OPA627 L/R and AD744 GND with comp pin output. Gain is 6, potentiometer is an alps RK097 WITHOUT the switch. (regular RK097)
Source PCM2702E (Neochen's miniusb)
Hiss and Buzz:
Appears:
1) When there is no music playing.
2) Appears at maximum volume when i touch the shaft.
3) Sometimes disappears when I remove the board from the metal case. Though I doubt the case is the issue because it occurs randomly at a low rate.
This is seriously bogging me, I've never had such problems with any other amplifiers I built before.
I even grounded the pot shaft with a wire directly to the TLE2426 tightened using the nut on the RK097 and it's still giving me buzz and hiss. Any ideas?
Source PCM2702E (Neochen's miniusb)
Hiss and Buzz:
Appears:
1) When there is no music playing.
2) Appears at maximum volume when i touch the shaft.
3) Sometimes disappears when I remove the board from the metal case. Though I doubt the case is the issue because it occurs randomly at a low rate.
This is seriously bogging me, I've never had such problems with any other amplifiers I built before.
I even grounded the pot shaft with a wire directly to the TLE2426 tightened using the nut on the RK097 and it's still giving me buzz and hiss. Any ideas?
