I got a pair of EL-34 and 6L6 but what bother me is that it got that STR-440 number for the EL-34 and the 6L6 got STR-420 on it, so I check to see the price of it on Mesa site and what I see is 6L6 STR-440 and EL-34 STR-442 and EL-34 STR-447 I just want to understand why they don't have the same STR number, what kind of tubes you put in your Mark III.
Thanks
Thanks