Valve & Transistor Data, pt 13 Transistor Base Data

Valve & Amplifier Design, Mullard Maintenance Manual (1961)

Valve & Amplifier Design, Valve Equivalents

Electronic Valves, RSGB Handbook, 4th Edition (LQ)

Valve & Amplifier Design, Mullard Data Book (1974)

Valve & Amplifier Design, Marconi Valves (1950s)

Electronic Valves, RSGB Handbook, 5th Edition (HQ)

Valve & Amplifier Design, EL34 (6CA7) Data, Mullard Valves

Valve & Transistor Data, pt 16 Index To Valves & Equivalents

Valve & Transistor Data, pt 14 Diode & IC Connections

Valve & Amplifier Design, ECC82 (12AU7) Data, Mullard Valves

Valve & Amplifier Design, ECL86 Data, Mullard Valves

Valve & Transistor Data, pt 07 Power Diodes

Valve & Transistor Data, pt 02 Valve Data

Valve & Amplifier Design, EL34 (6CA7) Data, Mullard Valves

Valve & Transistor Data, pt 15 Industry Trade Names

Electronic Valves, Operating Conditions, Mullard Technical

Valve & Amplifier Design, Marconi Valves (1950s)

Valve & Amplifier Design, ECC83 (12AX7) Data, Chelmer Valves

Valve & Transistor Data, pt 16 Index To Valves & Equivalents