Single
- Various 6X4Out of stock
- JJ/Tesla 6CA4 / EZ81Out of stock
- Various 6X5GT / EZ35$15.00
- Various 5U4GB / 5AS4A USED$15.00
- RCA 6X5GT / EZ35$16.00
- JJ/Tesla 5U4GBOut of stock
- Cetron 5R4WGB JAN$18.00
- JJ/Tesla 5AR4/GZ34Out of stock
- Sino 5U4G-CHZOut of stock
- Sovtek 5V4GT$25.00
- Electro-Harmonix 5U4GB$29.00
- Electro-Harmonix 6CA4$29.00
- Sovtek 5AR4/GZ34Out of stock
- Sovtek 5Y3$31.55
- Sino 5AR4/GZ34-CHZOut of stock
- Various 5U4GB$39.50
- Genalex U77/GZ34 Gold LionOut of stock
- TungSol 5AR4/GZ34Out of stock
- Svetlana 5U4GOut of stock
- Mullard 5AR4/GZ34Out of stock