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Hi,
This is my first post, so hello and thanks in advance for any help. I have Mesa Tremoverb. It is running Mesa 6L6 STR-440s (Chinese tubes). It also has the EH 5U4GB rectifier tubes. The sag is a little too mushy, so i thought putting in a pair of JJ GZ34s will tighten it up a bit. I know this will increase the voltage, but how will it change the bias to the tubes? As you know, the amp has a fixed bias. Right now, they are all dead even at 30mA, and the amp sounds very good. Will the switch and increase in voltage raise, lower, or not affect the current draw of the tubes? I don't mind if it goes higher since that makes the amp sound better, but I don't want it to go any lower. Also, since this amp has a selector switch for rectifier tubes or silicon diodes, will changing to the GZ34 only raise the voltage when rectifier tubes are selected? Thanks a bunch in advance.
This is my first post, so hello and thanks in advance for any help. I have Mesa Tremoverb. It is running Mesa 6L6 STR-440s (Chinese tubes). It also has the EH 5U4GB rectifier tubes. The sag is a little too mushy, so i thought putting in a pair of JJ GZ34s will tighten it up a bit. I know this will increase the voltage, but how will it change the bias to the tubes? As you know, the amp has a fixed bias. Right now, they are all dead even at 30mA, and the amp sounds very good. Will the switch and increase in voltage raise, lower, or not affect the current draw of the tubes? I don't mind if it goes higher since that makes the amp sound better, but I don't want it to go any lower. Also, since this amp has a selector switch for rectifier tubes or silicon diodes, will changing to the GZ34 only raise the voltage when rectifier tubes are selected? Thanks a bunch in advance.
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