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Hey all, Just recently made the switch from the standard Mesa 5U4G rectifier tubes to NOS Tung-Sol 5U4GBs in my Rev G 2 channel Dual Rec. I wasn't really expecting too much of a difference, but was surprised once I fired the amp up. While the overall tone of the amp did not change, there was a...

Alright, that's good to know. There was a marked improvement in the tone with the RFT in V3, which makes sense since the signal was going through all NOS tubes in the preamp. The Sovtek just doesn't compare. I'd highly recommend that preamp configuration to anyone else looking to experiment -...

Hey all, I've recently discovered the world of NOS tubes and have been thrilled with the results so far. I'm going for a sort of Adam Jones (Tool) meets Brent Hinds (Mastodon) sound. I love a lot of in-your-face mids. Here's what I'm using for my Rev G Dual Rectifier: V1: Baldwin labeled...

I also bought a supposedly balanced PI tube (from eurotubes) when I was first dealing with this issue. I'm hoping that it turns out swapping the PI with a different, better tube fixes the problem. My amp has been at the tech for a while, and I think they're a little stumped by it (not a good...

I might have to bite the bullet and get it looked at by a tech then. I potted the pickups and made sure they were absolutely stable, but am still getting the same squeal. It is certainly a frustrating problem, I like to have both of my masters around 5.5, but can't have the gain anywhere above...

Thanks for the response. I just went through a retube trying to fix this problem with no luck. Consequently the amp does sound better than ever due to the new tubes, when it's not squealing. I'm beginning to think that my pickups are microphonic in each of my guitars I've tested. After doing...

Hey all, great board you guys have here. I have a .50 caliber + (6l6 version) head that is experiencing excessive squealing when playing at band level volumes with the gain set to anywhere above 2. The type of squealing I'm talking about is incredibly high pitched (sounds like an angry pig) and...