The stock tubes are Chinese.
Jolida recommended to me the Svetlana EL34's and the JAN Phillips input tubes. They told me that the Tesla tubes tended to vibrate with a resonance in the unit. The Sovtec's are also OK for output. I don't know about NOS, but you should probably do a search on Audio Asylum.
Jolida recommended to me the Svetlana EL34's and the JAN Phillips input tubes. They told me that the Tesla tubes tended to vibrate with a resonance in the unit. The Sovtec's are also OK for output. I don't know about NOS, but you should probably do a search on Audio Asylum.