mk3 easier to bias than earlier versions - still need multimeter and hook probes (and the long blade screwdriver)... but that is the power tubes
to bias the input tubes is tough... best to send to factory as much as a pain and major cost that may be... good news is once done the small signal tubes will be good for years and years
and to the earlier point... +1 yes 6h30's all the same...
to bias the input tubes is tough... best to send to factory as much as a pain and major cost that may be... good news is once done the small signal tubes will be good for years and years
and to the earlier point... +1 yes 6h30's all the same...