Overview
The Motorola 6-6378 resistor is a classic carbon composition fixed resistor rated at 56K ohms with ±10% tolerance and 1/2W power dissipation. Featuring axial termination and original Motorola manufacturing, this New Old Stock (NOS) unit is sought after by technicians, hobbyists, and restoration specialists for authentic component replacement in vintage electronics, tube amplifiers, and mid-century analog circuits.
Key Features
- Resistance: 56K ohms (56,000 Ω)
- Tolerance: ±10% — typical for vintage carbon composition resistors
- Power Rating: 1/2W (0.5W) — suitable for signal-level and moderate power applications
- Construction: Carbon composition — valued for warm, natural frequency response in audio circuits
- Termination: Axial leads — standard through-hole component for point-to-point and PCB soldering
- Condition: New Old Stock (NOS) — never used, original packaging
Technical Specifications
- Resistance Value: 56K ohms (56,000 Ω)
- Tolerance: ±10%
- Power Rating: 0.5W (1/2W)
- Element Type: Carbon composition
- Termination Style: Axial leads
- Manufacturer: Motorola
- Part Number: 6-6378
- Country of Origin: United States
- Condition: New Old Stock (NOS)
- Typical Operating Temperature: −55°C to +125°C (carbon composition range)
Typical Applications
- Tube amplifier and pre-amplifier circuits
- Vintage radio and vintage entertainment electronics restoration
- Classic guitar amplifier repair and modification
- Mid-20th century test equipment and instrumentation
- Audio signal coupling and biasing networks
- Vintage synthesizer and analog music equipment
- Historical preservation and museum-quality electronic restoration
Compatibility & Replacements
Compatible With
- Vintage tube audio circuits and amplifier designs
- Classic transistor-based analog electronics
- Mid-century test instruments and radio receivers
- Point-to-point and PCB hand-wired vintage equipment
Replaces / Drop-In Replacement For
Verify compatibility with your specific vintage equipment or restoration project. This NOS Motorola unit is a direct replacement for original 6-6378 resistors removed or damaged in restoration work. Confirm resistance value and power rating match your schematic before substitution.
Works With
- Any 56K ohm circuit requirement at 1/2W or less
- Vintage radio and electronics repair protocols
- Audio tube amplifier restoration standards
- Classic guitar amplifier modification and service
