Vacuum Tubes by Brand Name

• Sophia Electric™/S.E.T. Princess™ Tubes: 300B/2A3/45/50/845/211/PX4/PX25/274B/205D/300B+/206
  
  
  
• Sophia Electric™ Input/Driver Tubes:
  6SN7/6SL7
  
  12AU7/12AX7
  
  
• Shuguang tubes: GEC KT88/845A/845B/845 metal plate