ADA Depot - A Forum To Support Users of ADA Amplification Gear

ADA Preamps => Original MP-1 => Topic started by: Dna^Yay on May 30, 2014, 06:57:37 AM

Title: EQ not working
Post by: Dna^Yay on May 30, 2014, 06:57:37 AM

So i just replaced a few opamps and the main EQ chip LF347 with a MC33079. Now im not sure if it is the chip or something else is shorting out on the amp but only the treble will work when eqing the sound, literally bass middle and presence do not work.

Can anyone help out?

Title: Re: EQ not working
Post by: Dna^Yay on May 30, 2014, 08:49:54 AM

Tried resoldering the pins of the IC again and it brought in the middle but still nothing on the bass or presence. Now though the whole thing is kaput and im getting signal on the front of the unit but nothing is coming out at all anymore, through the headphone socket i can hear the guitar really quietly. Uhh think its buggered