Hi everyone, I've been working on an A47 amp using the power supply from the MINT. I finally got all of the parts and put the circuit together on a breadboard.Well, i'm getting trebbly mono sound from the amp, and strangely, pulling the power out of the left or right opamp results in total loss of sound. I must have wired something wrong--perhaps an incorrect assumption on how this breadboard works (i'm still very much a newbie).
If someone could please take a look at the attached pictures and spot what i've done wrong it would be greatly appreciated.
Some possibilities:
- grounding of the input and output plugs. Does the ground plug go to the vgnd rail or to the ground on the breadboard?
- could the channel crosstalk be happening through the vGnd rail?
- opamps don't appear to be oscillating--they're not hot etc.
- are pins 6 and 7 on the opamps really supposed to be jumped with no resistor?
The circuit schematic.
My ugly breadboard job. Click here for a bigger image.
[Edited by elconcho on 06-26-2003 at 04:38 AM.]
posted 06-25-2003 11:34 PM CST (US) 
