Wow thank you all. My amp is a Jolida 302a with 2 matched pairs (4) of 6CA7/EL34 power output; 2 pcs. 12AX7 pre-amplifier; 2 pcs. 12AT7/ECC81 power drivers. I have not replaced the EL34's they are still stock Chinese. The smaller tubes I did replace. With Phillips and military grade mullards. I would very much appreciate comments on testing and biasing. I did the biasing as per the specs when I set-up my unit. What would 'overbiasing' mean?
I also have made sure that the fuse type is exactly the same as speced by Jolida.
I've blown 3-4 tubes in the last 4-5 months.
Thanks again
I also have made sure that the fuse type is exactly the same as speced by Jolida.
I've blown 3-4 tubes in the last 4-5 months.
Thanks again