Tube type list
Sylvania Technical Manual 1943
Sylvania Technical Manual 1949
The Big Tube Data Page
The Big Tube Data Page
Loadline calculator for power stages with reactive load - Vacuum Tube Amplifiers - DIY
Tube type list
Tube type list
Vacuum Tube - 6J7G, Pentode, Sharp Cut-Off | Antique Electronic Supply
6SJ7 - Vacuum Tubes, Humor & Technology
The Big Tube Data Page
6J7, Tube 6J7; Röhre 6J7 ID2098, Vacuum Pentode | Radiomuseum.org
6J1 Datasheet(PDF) - List of Unclassifed Manufacturers
Tube type list
6J7, Tube 6J7; Röhre 6J7 ID2098, Vacuum Pentode | Radiomuseum.org
Tube List (English)
TDSL Tube data [6J7]
Simple Valve Amplifier Circuits.
6J7 @ The Valve Museum
Tube type list
Download - Vacuum-Tube-Shop
6J7G, Tube 6J7G; Röhre 6J7G ID2694, Vacuum Pentode | Radiomuseum.org
