Hi,
i am using a few EL34 based amps where the rail voltage is 790 V (old Dynacord amps, a G-2000 with 4 output tubes and 2 Eminent 2 with 2 output tubes, delivering 150 W resp 80 W)
I am using these amps mainly as bass amps.
I would like to replace the EL34 by new tubes, and i am considering (JJ) KT77.
Is there anything known on the reliability of the KT77 in these environments?
The target amplifiers all allow for individual biasing of each tube. All screen resistors have been enlarged by 50% because it should be possible to operate the amps at their limits.
i am using a few EL34 based amps where the rail voltage is 790 V (old Dynacord amps, a G-2000 with 4 output tubes and 2 Eminent 2 with 2 output tubes, delivering 150 W resp 80 W)
I am using these amps mainly as bass amps.
I would like to replace the EL34 by new tubes, and i am considering (JJ) KT77.
Is there anything known on the reliability of the KT77 in these environments?
The target amplifiers all allow for individual biasing of each tube. All screen resistors have been enlarged by 50% because it should be possible to operate the amps at their limits.