JJ 5751 Preamp Vacuum Tube

JJ Electronics Amplifier Tube (T-12AT7-JJ)

JJ Electronics Amplifier Tube (T-12AX7-S-JJ)

JJ Electronics 12AU7 / ECC82 Preamp Vacuum Tube

JJ Electronics Amplifier Tube (T-EL84-JJ-MP)

Tung-Sol 12AX7 Preamp Vacuum Tube, Single

Fender Groove Tubes GT-12AY7 Select Amplifier Tube

JJ Electronics Amplifier Tube (T-6L6GC-JJ-MP)

JJ 12AX7 / ECC83 Preamp Vacuum Tubes (Three Pack)

Electro-Harmonix 12AY7 EH / 6072A Vacuum Tube