9100 convert to el34's from 5881
Posted: Tue Mar 26, 2019 8:56 am
Hi,
I am new to this excellent forum.
I would like to convert on side of my 9100 power amp to run on el34's. That would give me the choice of using either 5881's or el34's.
I understand that the transformers are fine but that some resistor changes and a re-bias will be needed. I also plan to modify the tray so that the taller el34's will fit under the hood...
Has anybody here carried out this conversion and if so, what steps are needed? I do have the Marshall schematics so no problem referring to the schematic part numbers.
Kind wishes and many thanks in advance...
I am new to this excellent forum.
I would like to convert on side of my 9100 power amp to run on el34's. That would give me the choice of using either 5881's or el34's.
I understand that the transformers are fine but that some resistor changes and a re-bias will be needed. I also plan to modify the tray so that the taller el34's will fit under the hood...
Has anybody here carried out this conversion and if so, what steps are needed? I do have the Marshall schematics so no problem referring to the schematic part numbers.
Kind wishes and many thanks in advance...
No... I still plan to one day but other things took over. 