🏷️ Basic Information Identification Make: Champion Model: 840 / 841 V.H.F. / F.M Receiver Year: Unknown Generation: N/A 📋 Manual Details Document Info Manual Type: Circuit Diagram Language: English Page Count: Unknown Format: Diagram 📄 Vehicle Type Receiver Type Receiver Technology: V.H.F. / F.M 📄 Receiver Features Bands Wavebands: Three (including V.H.F.) Modulation Modulation Types: Combined A.M. / F.M Valve Configuration Valve Count: Six (including rectifier) 📄 Model Variations Model 840 Model 840 Description: Console auto radiogramophone Model 840 Features: Three speed motor 📄 Technical Details Power Supply Voltage Requirements: Unknown Frequency Requirements: Unknown 📄 Audio Output Amplifier Type Amplifier Circuit: Unknown Speaker Configuration Speaker Details: Unknown 📄 Tuning System Tuning Mechanism Tuning Method: Unknown 📄 Antennas Antenna Input Antenna Type Support: External (likely) 📄 Performance Sensitivity Fm Sensitivity: Unknown Am Sensitivity: Unknown Selectivity Fm Selectivity: Unknown Am Selectivity: Unknown 📄 Connectivity Additional Inputs Phono Input: Yes (for radiogramophone models) 📄 Case Design Enclosure Enclosure Type: Console (for Model 840)