GoodSoundClub - Romy the Cat's Audio Site

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

Post Subject: V1/V2 Replacement socketsPosted by jessie.dazzle on: 6/22/2010

skushino wrote:
"...Today I replaced the problematic pair of Chinese 7 pin sockets on one of my ML2s... I believe these were the cause of burning through a couple V2s, and the wildly dynamic plate voltage readings..."

I too have fluctuating V2 plate current, forcing me to run the tubes at around 250mA in order to ensure that it doesn't creep above the recommended max of .31; I am hoping new tube sockets will solve this issue.

What sockets did you use?

I would like to know details of and where to buy the "Japanese Exotic" sockets Romy mentions here:
http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=6140#6140

"...There were burns, loose, stiff and dulled wires, and other signs of arching near the sockets..."

As it is not always obvious from the outward appearance of components, it would be very useful to know which, if any might be subject to damage as a result of an arcing or failed V2 tube.

While the amps are open, it would seem logical to replace all the sockets (those for the smaller tubes as well).

One "advantage" of the cheap sockets used throughout Lamm gear is that they can be easily, purposely broken (carefully crushed with pliers), thereby facilitating their removal from the board; once broken, it is no longer necessary to simultaneously heat several soldered points.

jd*

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