0.18A Series-string DC Mains Valves. A Continental idea

1950s Valve Manufacture - part one. Flash film showing the making of the EF80

1950s Valve Manufacture - part two. Flash film showing the making of the EF80

1950s Valve Manufacture - part three. Flash film showing the making of the EF80

1950s Valve Manufacture. Anode pressing

1950s Valve Manufacture. Cathode spraying

1950s Valve Manufacture. EF80 Assembly

1950s Valve Manufacture. Glass tube manufacture

1950s Valve Manufacture. Grid winding

1950s Valve Manufacture. Heater production

1950s Valve Manufacture. Making a pressed glass foot

1950s Valve Manufacture. Manufacture of Tungsten wire

1950s Valve Manufacture. Mica supports

1950s Valve Manufacture. Evacuation and testing

The 1T4 Exploded. Manufacturers Diagram

Mullard 2D4A or Philips KB2. A doubt arises

6.3 Volt Valves. Notes on introduction.

The 6H6 Diode Family. A sidelight on our exhibits

813 Beam Transmitting Tetrode from RCA. Annotated diagram.

Amplification and Valve Characteristics. Technical article on mu, gm and gain-bandwidth

The Anode Bend Detector. A high impedance AM detector.

The Azide Process. Technical article on cathode technology

Barkhausen-Kurz (B-K) Mode Oscillators. Early Centimetric Wave Generation.

Beam Tetrodes and the 807 Developments in power valves.

Early Bi-Grid Valves.

BVA Influence The effect of a cartel in a global market.

Catkin Valves A 'blind alley'?

Ceramic or Moulded Base Caps? Why choose Ceramic?.

Continental Imports of the 1930's

The Cossor Wuncell Range The first oxide-coated valves produced in Britain.

Double Triodes ECC81, ECC82 & ECC83 and pin compatibles A substitution list.

DER Valves. Evolution of Early Dull Emitter Valves.

Disc Sealed Valves. Also known as Planar valves and

Lighthouse Valves .

Domestic Rectifiers. Why indirect heating was needed.

The Early Mullard Naming Convention. The Meaning of AC044.

Early Transmitting Valves. WW1 valve technology.

The Ediswan Safety Cap. To avoid HT across the filament.

FM Broadcasting and Signal Detection The ratio detector etc.

Gated Valves. Linear and pulse modulation combined.

Lighthouse Valves. Octal based disc seal valves.

The 'Magic Three' Valves. Standard valves for the modern superhet.

Mullard's ECC83. A world series valve from Mullard

The Mullard EF36 and EF37. Evolution to an Audio Classic

Mullard's EF86. A world series valve from Mullard

Mullard's EL34. A world series valve from Mullard

Mullard's EL84. A world series valve from Mullard

The Mullard Receiving Valve Naming Convention. How to decode a receiving valve name

Mullard 'Straight' Screened Pentodes. SP valves from Mullard

The Mullard Transmitting & Industrial Valve Naming Convention. How to decode a Mullard Industrial valve name

Mullard xx5x Series Valves Notes on Mullard's miscellaneous range

Murphy Radio.

The Nuvistor. A transistor sized valve.

Pentagrid Converters. Enter the modern Superhet

The Philips-Mullard (PM) Series. The first '

azide ' valves

Pioneers of HT Rectifiers. A MOV speciality

Type Q and type V24 Valves. The first hard vacuum valves designed in Britain

QS92/10. Measurements

Quick Heating Valves. Transmitting valves for mobile use.

Quiescent Push-Pull. A more efficient output stage for battery sets.

Rectifiers for Pulse Modulators High voltage devices with low average current.

The S625 Valve. The World's first HF screen-grid tetrode.

Series Pass Valves. Valves for voltage regulators.

Shortpath Construction.

Silica Valves. A Mullard speciality

Subminiature Valves. War & Peace

Television RF Valve Development. The challenge of high bandwidth gain at 45 MHz

Television and Video Camera Tubes. How they work

Thermistors and Heater Chains. Avoiding thermal shock in series heater chains

Tuning Indicators. A need to accurately tune superhets.

VT Valve Series. UK Post office, RAF and US types.

The VT25 A modernised version of the DET1.