Home / Shop
4CS6 Vacuum Tube New and Used

- Description
- Specifications
The 4CS6 is a 7-pin miniature dual-control heptode designed for frequency converter, noise-gated sync separator, and mixer circuits in radio and TV receivers. Operating on a 4.2V/450mA series heater, its dual control grids allow precise signal gating and conversion efficiency. It was regularly used in 1950s Zenith, Admiral, and Motorola receivers for stable local oscillator and mixer performance. Available in NOS and tested used conditions.
Type: Dual-Control Heptode (Mixer / Converter / Sync Separator)
Base: 7-Pin Miniature (EIA 7CH layout)
Heater Voltage: 4.2V
Heater Current: 0.45A
Max Plate Voltage: 275V
Max Screen Grid Voltage: 100V
Max Plate Dissipation: 2.0W
Conversion Transconductance: 1,400 microsiemens (1.4 mA/V)
Equivalents: 4CS6, 6CS6 (6.3V equivalent), 3CS6 (3.15V equivalent), EH90