for all the gory technical details, the datasheet is available here: http://korgnutube.com/pdf/Nutube_DatasheetV1E.pdf http://korgnutube.com/pdf/Nutube_Datashee

for all the gory technical details, the datasheet is available here: http://korgnutube.com/pdf/Nutube_DatasheetV1E.pdf http://korgnutube.com/pdf/Nutube_DatasheetV1E.pdf interesting that they break the typical vacuum tube naming convention--the first number usually refers to the filament voltage. as a 6P1, i'd expect it to have a 6.3V filament, but it actually has a 0.7V filament!