So at the tail end of my 2 week staycation of drunkenness, guitar playing, computer work, and helping my grandparents move into an assisted living facility, I finally got around to swapping some tubes in the Tiny Terror. Stock, it's 2x JJ 12AX7s and 2x JJ EL84s.
Config 1
- v1 - old RCA 5751 that has sounded great in the Micro Terror and amazing in v1 the Panama Shaman Retro
- v2/PI - New Sovtek 12AX7lps that has sounded great in the Micro Terror and very good the PI slot of the Panama Shaman Retro
Short evaluation
Sounds really good clean, a little more more depth and vintage hair than on the very nice stock JJ 12AX7s. A lot of sweet, rounded character to the sound.
Distorted, it sounds quite good with lower gain. In fact really, really good. The higher the gain, the "flabbier" it gets, though. You can convincingly go up through late-80s Priest just on amp gain and an OD, but it doesn't sound as good (to my ears) as with the stock JJ 12AX7s. I didn't try it with different pedal settings, just what I've been using for a month or so.
Final verdict
Better clean, good dirty, not as good with high gain (but still acceptably nice-sounding). I like it because I go high gain maybe once a week; everything else is relatively low gain.
I'll try swapping each new tube in turn with its predecessor and see how that changes the sound. I have old pull Hammond Organ 12AX7s, old pull 12AU7s, NOS 12AU7s, etc. to try out. And that's not even considering the 2 EL84s (which are JJs).