Marshall 5203

[THRobinson]

IC1 was indeed the culprit.

Bought from Digikey,

PART: 296-1403-5-ND
MFG : Texas Instruments / MC1458P

Soldered in an 8-pin socket, and soldering was perfect, looked like a machine did it. 0 sound. Desoldered without thinking, shoulda used a multimeter first. Went to solder it back again and a few of the traces were gone. I will mention, this board was worked on before... looks like newer jacks, the pots all replaced with cheaper ones sadly, and IC1.

Soldered in small wires to rebuild the traces, this time, multimeter like I should have done, and works fine. Bit buzzy... grounding issue, but may be in part due to this house. 100+yr old house, still needs to be rewired, no ground.

In anycase... by the time I finally got this all done, the bass pot was starting to get stiff again, so I suspect by Spring, I'll be replacing the pots with genuine Marshall. I'd use Bourns or CTS but the middle lead is offset... though still, if leads long enough, may be as simple as a small bend and it'll reach.