After fixing my power supply (damn Zener's), I now have a problem with the pre-amp.
When the amp is cold, one channel on the preamp fades in and out. After the amp has warmed up, there's no problem. It also reacts to tapping on the Stereo switch.
I have re-soldered EVERY joint on the preamp PCB (even the dodgy looking Plated Through Holes), and cleaned the stereo selector switch. Now I am left with a component problem. What's most likely to cause an issue? A transistor? or a cap? What should I replace first?
Cheers,
Nick
When the amp is cold, one channel on the preamp fades in and out. After the amp has warmed up, there's no problem. It also reacts to tapping on the Stereo switch.
I have re-soldered EVERY joint on the preamp PCB (even the dodgy looking Plated Through Holes), and cleaned the stereo selector switch. Now I am left with a component problem. What's most likely to cause an issue? A transistor? or a cap? What should I replace first?
Cheers,
Nick