Overview
The Motorola 6-5659 is a vintage resistor file pack designed for use in classic electronic equipment and industrial applications. This fixed resistor delivers precise resistance values with a 3.9K ohm rating, 1/2W power handling capability, and ±10% tolerance specification suitable for a wide range of analog and digital circuit designs.
Key Features
- Resistance Value: 3.9K ohm (3900Ω)
- Power Rating: 1/2W (0.5W) continuous duty
- Tolerance: ±10% — industry-standard acceptance band for general-purpose circuits
- Vintage Motorola manufacture — proven reliability in legacy equipment
- File pack format — organized packaging for inventory management and stockroom use
- Through-hole axial configuration — compatible with traditional PCB assembly and breadboarding
Technical Specifications
This resistor meets standard carbon-film passive component specifications widely used in mid-20th century consumer and industrial electronics. The ±10% tolerance band indicates use in non-critical applications where moderate resistance variance is acceptable, such as biasing networks, pullup/pulldown circuits, and signal conditioning stages.
- Operating Temperature Range: Typical -55°C to +70°C (vintage carbon-film standard)
- Maximum Voltage Rating: 350V typical for 1/2W carbon-film resistors
- Resistance Tolerance: ±10%
- Lead Material: Tinned copper (standard vintage construction)
- Mounting Type: Axial through-hole
Typical Applications
The 3.9K ohm, 1/2W resistor is used in:
- Vintage consumer radio and audio equipment (biasing, frequency tuning)
- Industrial control circuits and relay driver networks
- Analog instrumentation and test equipment
- Legacy computer and calculator circuit boards
- Telephone switching and telecommunications equipment
- Restoration and repair of classic electronic devices
Compatibility & Replacements
Compatible With
- Vintage Motorola radio chassis and receiver designs
- Mid-century industrial control panels and automation circuits
- Legacy telecommunications equipment
- Analog circuit breadboards and prototyping layouts
- PCB repair and component replacement in classic equipment
Replaces / Drop-In Replacement For
As a file pack component, this resistor is a direct replacement for any circuit specification calling for a 3.9K ohm, 1/2W, ±10% tolerance fixed resistor. Common vintage part numbers using this value include standard E12 and E24 series design values found in mid-20th century Motorola, Philco, RCA, and Zenith equipment. Verify compatibility with your circuit schematic before ordering.
Works With
- Carbon-film and composition resistor circuit designs
- Vintage PCB assembly and hand-soldering workflows
- Breadboarding and prototype testing on standard 0.1″ pitch boards
- Manual circuit analysis and Ohm’s law calculations
- Analog electronics education and restoration projects
