Current Theory: I believe the ground wire coming out of theTechnics 1200 is attached to the tonearm. When the ESD happened upon lifting the tonearm, it makes sense it would travel through that ground wire and arrive at the phono preamp where it was connected, as the next stop on its journey for ground.
Since the preamp does not have a 3rd prong (the ground prong), the electrostatic discharge didn't have a safe path to ground, so instead of bypassing the sensitive electronics, it pulsed through them, breaking something along the way.
I've attached my TT ground to a screw on the chassis of my fully earth-grounded amplifier, which will hopefully send any electrical discharges down a safe path to ground. As an added benefit, I have discovered an all-new blackness to my vinyl background I didn't even know possible.
Hopefully those who are more knowledgeable about electrical theory can confirm or deny the above hypothesis!
Since the preamp does not have a 3rd prong (the ground prong), the electrostatic discharge didn't have a safe path to ground, so instead of bypassing the sensitive electronics, it pulsed through them, breaking something along the way.
I've attached my TT ground to a screw on the chassis of my fully earth-grounded amplifier, which will hopefully send any electrical discharges down a safe path to ground. As an added benefit, I have discovered an all-new blackness to my vinyl background I didn't even know possible.
Hopefully those who are more knowledgeable about electrical theory can confirm or deny the above hypothesis!