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In the Forum: Audio Discussions
In the Thread: Initial thoughts about new/old Lamm ML2s

Post Subject: ML2 cap substitutionPosted by skushino on: 6/22/2010

Today I replaced the problematic pair of Chinese 7 pin sockets on one of my ML2s. It looked like they were replaced at least once before, and that my job is at least the second set of replacement sockets, so three total counting the OEM pair. There were burns, loose, stiff and dulled wires, and other signs of arching near the sockets. I believe these were the cause of burning through a couple V2s, and the wildly dynamic plate voltage readings. When the bottom was open, I took a closer look at the pair of Cube 935s, bypassed by Cube 950s. I believe these are NOT coupling caps, and are actually filter caps. The coupling cap is the blue rectangular MKP to the left of the yellow Cubes. Of course there is no guarantee - I don't have a ML2 schematic. But anyone considering substituting caps inside the ML2 (as I was) may want to double check before pulling the trigger on purchasing new, exotic caps.

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