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I stored my LSS for about six months in a heated and air conditioned room. When I removed the cover on the LSS yesterday, I found a large bubble which was stuck to the inside of the Mesa cover. There are smaller bubbles also. I've never seen this happen to an amp's tolex . I've had the amp...

Most everyone is familiar with the 5Y3 problem in the LSS. In short, the LSS puts just a little too much strain on the 5Y3 rectifer tube which results in high failure rate of these tubes from arcing. Most folks have "solved" the problem by using a NOS rectifer, which is a bit more durable than...

Most everyone is familiar with the 5Y3 problem in the LSS. In short, the LSS puts just a little too much strain on the 5Y3 rectifer tube which results in high failure rate of these tubes from arcing. Most folks have "solved" the problem by using a NOS rectifer, which is a bit more durable than...

Most everyone is familiar with the 5Y3 problem in the LSS. In short, the LSS puts just a little too much strain on the 5Y3 rectifer tube which results in high failure rate of these tubes from arcing. Most folks have "solved" the problem by using a NOS rectifer, which is a bit more durable than...

I have a LSS that I bought new in April 2005. Within the last couple of months I've noticed a nasty harsh overtone on CH2. Last week while I was setting up for a gig, it started to squeal. The cause seemed to be that I had not plugged the FX return line into the pedal board. Plugging it in...