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

1950s Valve Manufacture. Anode pressing

1950s Valve Manufacture. Cathode spraying

1950s Valve Manufacture. EF80 Assembly

1950s Valve Manufacture. Evacuation and testing

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

6.3 Volt Valves. Notes on introduction.

The 6H6 Diode Family. A sidelight on our exhibits

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.

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

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.

Early Bi-Grid Valves.

Early Transmitting Valves. WW1 valve technology.

The Early Mullard Naming Convention. The Meaning of AC044.

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.

The GTY Suffix on Octal Valves. What the Y tells us.

Lighthouse Valves. Octal based disc seal valves.

Mullard xx5x Series Valves Notes on Mullard's miscellaneous range

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

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

The Mullard EF36 and EF37. Evolution to an Audio Classic

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

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

Mullard 'Straight' Screened Pentodes. SP valves from Mullard

Mullard's EF86. A world series valve from Mullard

Mullard's ECC83. A world series valve from Mullard

Mullard's EL34. A world series valve from Mullard

Mullard's EL84. A world series valve from Mullard

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

Quick Heating Valves. Transmitting valves for mobile use.

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

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

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.