Pentagrid Converter - Other Mixer Valves

Other Mixer Valves

• 6L7 - Superheterodyne mixer used in high-end console receivers of the late 1930s and early 1940s. (Most commonly used by Zenith.) Grid 1 is control grid (remote cutoff). Grid 3 is local oscillator signal injector. Local oscillator is always a separate valve, often a 6C5. Due to low relatively conversion transconductance (350 µmhos), this valve is always fed by at least one tuned RF amplifier.
• 1612 - Audio mixer version of type 6L7. Both control grids (1 and 3) are sharp-cutoff. Engineered to be less likely to develop microphonics.
• 1LB6 - Superheterodyne mixer for battery-operated radios. Like type 6L7, works with a separate oscillator and tuned RF amplifier. Can be used with AC/DC/Dry-cell battery power supplies.
• 1j37b - Dual control grid Pentode mixer or Mixer/Oscillator for battery-operated radios. Also good for AGC. Russian Military 1959 to 1991
• FM-1000 - Combined oscillator and quadrature FM detector for early post-war Philco radios. Manufactured only by Sylvania with either their markings or Philco markings.
• 6CS6 - Heptode with two sharp-cutoff control grids (1 and 3). Same basing as type 6BE6. Used as sync separator in television sets. Also: 3CS6, 4CS6, 12CS6.
• 6BY6 - Similar to type 6CS6, but with higher transconductance. Also: 3BY6.
• 12EG6 - Dual sharp-cutoff control grid mixer (grids 1 and 3). Has 12.6 volt plate and screen voltage. Designed for use with audio equipment powered by a car battery.