LSS Just Back From 5Y3 Mod

[twally]

The folks at Mesa are great. I guess I did a crappy job of packing my power tubes-one was broken. They replaced the tube. I also had a bad 5Y3 (they repalced it but told me they would do this before I shipped the amp). They also replaced the 12 AX 7 tube from the V3 position. The pre amp tube replacement has really brightened up the sound of the amp-I really like it.

Anyway, they replaced three tubes for free while doing the mod. Now I will have to see how long the 5Y3 will last.

TW

 

[RocksOff]

this is the mod they're offering to fix the rectifier tube problem?

 

[twally]

Yes it is.

And I tried to figure out the change but could not see anything out of the ordinary.

TW

 

[RocksOff]

Hmmm... i'm gonna have to check that out. They doin' it for free?

 

[twally]

Hmmm... i'm gonna have to check that out. They doin' it for free?

You have to pay for shipping your bare amp to them, but the mod is free and they ship it back to you for free.

 

[JOEY B.]

I wonder what the "fix" involves, as the NOS rectifier tubes seem to hold up well in this amp.

 

[ja22y]

I called them a while back to get the technical on the fix but the person I spoke to doesn't know. If anyone find out please let us know.

 

[GrooveMerchant]

What is this rectifier problem? It's the first I heard of it.

 

[nemesys]

The stock LSS has a tendency to eat newer rectifier tubes, as it draws close to the current limit of the 5Y3 tube that it uses. Some people have solved this by using NOS 5Y3s, which can handle more current than the new production tubes.