diazibon
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- Mar 5, 2025
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Hello,
I have a mesa mark iv 20 years now, it seems to sound ok, but i noticed that the power tubes aren't heating evenly. Twe two tubes to the right (looking from behind) are colder tha the other two. Don't want to break it because of something working improperly. I switched the tubes but it seems to be the circuit, because the tubes in the same sockets are colder now. When the amp isbin standby the difference is also noticeable.
I know is hard to tell, but can you give me some advice? I supose changing the pream tubes will not be the solution... the caps? Provably something in the power source or the transformer?
By the way, is possible to use a power tube probe, like a vht power tube tester or something similar in the mark iv? I don't know if it woild be harmful.
Thaks a lot everybody,
Greetings
I have a mesa mark iv 20 years now, it seems to sound ok, but i noticed that the power tubes aren't heating evenly. Twe two tubes to the right (looking from behind) are colder tha the other two. Don't want to break it because of something working improperly. I switched the tubes but it seems to be the circuit, because the tubes in the same sockets are colder now. When the amp isbin standby the difference is also noticeable.
I know is hard to tell, but can you give me some advice? I supose changing the pream tubes will not be the solution... the caps? Provably something in the power source or the transformer?
By the way, is possible to use a power tube probe, like a vht power tube tester or something similar in the mark iv? I don't know if it woild be harmful.
Thaks a lot everybody,
Greetings
