ECH4 Mullard

Description

Classic Triode-Heptode Converter
The Mullard ECH4 is a vintage triode-heptode vacuum tube designed for use in AM superheterodyne radios. It combines oscillator and mixer functions into one compact unit, which was essential in 1940s and early 1950s European radios. As a result, it became a trusted component in signal conversion stages, offering both performance and stability in early receiver designs.

Effective Frequency Handling
In operation, the triode section generates a local oscillator frequency, while the heptode mixes it with the incoming RF signal to produce a clean intermediate frequency. Moreover, Mullard’s engineering ensures smooth operation, consistent gain, and minimal signal interference. In addition, the tube performs with low noise and excellent tonal balance, even in aging or sensitive circuits. Consequently, the ECH4 maintains stable tuning and clear audio reception throughout the AM band.

Vintage-Compatible Design
Built with a side-contact base and glass envelope, the ECH4 fits perfectly in early European radios using the UCH4 or ECH4 format. Therefore, it serves as a direct replacement in many British and continental sets. Furthermore, its compact footprint and shielding compatibility make it ideal for densely packed chassis. Whether you’re restoring a post-war tabletop model or rebuilding a historic receiver, the Mullard ECH4 installs with ease and confidence.

Mullard Craftsmanship and Consistency
Mullard earned its reputation through high standards and rigorous quality control. The ECH4 reflects this with solid internal alignment, reliable thermal stability, and long service life. Additionally, the tube resists microphonics and delivers steady electrical behavior under varying operating conditions. As a result, it’s a dependable choice for collectors and restorers who value performance as much as authenticity.

Perfect for Authentic Restorations
Whether you’re a technician, hobbyist, or radio historian, the Mullard ECH4 offers the performance, historical accuracy, and lasting value needed to complete any AM radio restoration. Choose it for its trusted heritage, clean signal processing, and compatibility with classic gear.