Full manual available here:

https://www.radioelec.com/images/Image/Documentation/Notice%20Oeil%20magique.pdf

🔮 Electronic Magic Eye Tube – Tuning, Frequency & High-Voltage Display (EM34 / EM4 / 6AF7, etc...)

This electronic magic eye tube combines a retro visual display with advanced measurement functions: tuning indicator, frequency meter, and high-voltage voltmeter. Perfect for vintage radio restorations, tube amplifiers, and DIY electronic projects.

⚙️ Key Features

• Dual-sensitivity magic eye with integrated LCD screen
• First sector cutoff: –3.5 / –4 V, adjustable
• Second sector cutoff: –15 / –16 V, adjustable
• Input impedance: ≥ 50 MΩ
• Programmable eye colors: red, cyan, blue, yellow, green, white
• Display and modes programmable and saved in memory

⚡ Frequency Meter

• Range: 0–6500 kHz
• Input impedance: 1 MΩ
• Sensitivity: 30–100 mV AC depending on frequency
• Programmable frequency offset (±)
• Clear and configurable display

⚡ Voltmeter

• Range: 0–800 V
• Input impedance: 1 MΩ
• Programmable display for high-voltage measurement

📏 Dimensions

• Eye diameter: 25 mm
• LCD screen: 30 × 36 mm usable (31 × 45 mm total)
• Total length: 67 mm
• Max height: 45 mm over 22 mm then 35 mm
• Thickness: 32 mm

🔌 Connections

• Powered by filament voltage (no high voltage needed)
• Pins:
  • 6.3 V L: 6.3 V AC (<100 mA) or 6–12 V DC
  • 6.3 V H: 6.3 V AC or 6–12 V DC
  • GRID: control voltage (magic eye grid)
  • FIN: frequency meter input
  • GND: chassis ground (cathode)
  • +HT: voltmeter input
• Wire connections; octal socket available on request

💾 Memory and Display

• Color and display mode are retained even after power off
• Default color: green (classic cathode eye)
• Constant brightness, comfortable and long-lasting

🛠️ Usage

• Replaces all classic circular magic eyes (EM34, EM4, 6AF7…)
• Display modes:
  • Simple: classic eye with no numerical readout
  • Advanced: shows full or partial measurement functions with two character sizes
• Frequency meter: can display received station frequency with programmable offset based on IF
• Voltmeter: displays high-voltage value of the receiver