I've finally joined the Mesa club, after buying a pre-owned Lone Star Special (I've been wanting one for 6 months now). This amp had some pre-amp tube issues:
The both problem would go away after warming up for a hour or two.
Anyway....
After getting the tubization to my liking I've noticed that it seems to take at least half an hour before everything settles out. It's certainly playable after a few minutes (1 minute in standby then playing for a while). But I now know that I shouldn't touch any of my settings until its been played for a good while. Once it gets warmed up I can keep in it standby and come back and get the tone right away.
This is my first experience with a tube amp with this much gain and so many tubes (1-rect, 5-preamp, 4-power), my previous experience has been with small amps (Pro-Jr).
I'm interested in finding out how long it takes for other people amps to hit the sweet spot.
- - Microphonic squealling on Ch2 with Reverb On (replacing V4(reverb) seemed to do it)
- Auto Gain on both channels when I hit certain "A" and "E" notes with the gain up. If I hit the note hard and held it the amp would shift into overdrive, kinda doubling up the note. It would've been cool if I could control it and have it happen on any note. To stop it I'd have to hit some unrelated chord or switch channels which seems to mute temporarily. Fixed this with V1 (input/ch2 drive), also found that the first JJ 12AX7 that I used was very noisy in this position, I currently have a GT in there and its pretty quiet.
The both problem would go away after warming up for a hour or two.
Anyway....
After getting the tubization to my liking I've noticed that it seems to take at least half an hour before everything settles out. It's certainly playable after a few minutes (1 minute in standby then playing for a while). But I now know that I shouldn't touch any of my settings until its been played for a good while. Once it gets warmed up I can keep in it standby and come back and get the tone right away.
This is my first experience with a tube amp with this much gain and so many tubes (1-rect, 5-preamp, 4-power), my previous experience has been with small amps (Pro-Jr).
I'm interested in finding out how long it takes for other people amps to hit the sweet spot.