Model:
12BV7
Brand:
RCA
Classification:
Pentode
Model:
12BY7
Brand:
Sylvania
Classification:
Pentode
Model:
12DQ7
Brand:
General Electric
Classification:
Pentode
Model:
12GN7A/12HG7
Brand:
National
Classification:
Pentode
Model:
12SK7
Brand:
RCA
Classification:
Pentode
Model:
34
Brand:
General Electric
Classification:
Pentode
Model:
39/44
Brand:
USA
Classification:
Pentode
Model:
307A/VT-225
Brand:
Kenrad
Classification:
Pentode