hi,i want to try el34 in outer socket of mark 4. is it safe ank ok to use jj E34L like this?:
http://www.tube-town.net/ttstore/product_info.php/info/p108_JJ-E34L-Red-Label---TT-XMatching.html
or is it better to use mesa tubes?(because of the fixed bias)?
http://www.tube-town.net/ttstore/product_info.php/info/p108_JJ-E34L-Red-Label---TT-XMatching.html
or is it better to use mesa tubes?(because of the fixed bias)?