Product Overview
Vintage Motorola 22k Ohm 1/4W Carbon Composition Resistor File Card - 10 Units, 10% Tolerance
Condition
Unused NOS. Card file intact with 10 brown-bodied axial-lead resistors. Motorola stylized M logo and catalog number 6-124C21 legible on front tab; catalog number 54-84066A05 printed on reverse. Tab stamp "22K-10-1/4" confirms 22k Ohm, 10% tolerance, 1/4W rating. Sourced from an electronics distributor consolidating inventory.
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Product Overview
Motorola 6-124C21 - a card-packed file of 10 vintage carbon composition resistors, 22k Ohm, 1/4 Watt, 10% tolerance, axial lead through-hole form factor. Motorola packaged these in card file folders for service bench use, and this card has stayed intact. A period-correct replacement for vintage consumer electronics, tube equipment, and ham radio gear that originally specified carbon composition components.
Key Features
- Resistance: 22k Ohm (22,000 Ohms)
- Power rating: 1/4W (0.25W)
- Tolerance: 10%
- Element type: Carbon composition
- Lead style: Axial, through-hole
- Quantity: 10 resistors per card
- Color code: Red-Red-Orange-Silver (confirmed by visible banding)
- Dual catalog numbers on card: 6-124C21 (front tab) and 54-84066A05 (reverse)
- Motorola Communications Division branding visible on card
Applications
- Restoring a vintage tube radio or amplifier where a drifted or failed 22k carbon comp resistor needs a period-correct replacement - not just electrically correct, but visually and historically authentic
- Repairing older ham radio transceivers that originally used carbon composition components in their RF or audio stages, where the pulse-handling characteristics of this resistor type were part of the original design
- Maintaining a vintage hi-fi amplifier where substituting a modern film resistor would alter the original circuit behavior or raise questions about authenticity for a collector
- Builders experimenting with carbon composition sound in guitar amplifier circuits or effects pedals where the material characteristics of this resistor type are specifically sought
- Makers and tinkerers sourcing period components for retro builds, art projects, or educational displays showing component evolution across electronics eras
Frequently Asked Questions
Are these carbon composition or carbon film resistors?
Carbon composition. The research notes and visible construction confirm it. Carbon composition resistors differ from carbon film in construction, noise characteristics, and pulse handling - which is exactly why restorers seek them out for period-correct repairs.
How many resistors are in this listing?
Ten. One full Motorola file card containing 10 axial-lead 22k Ohm resistors, as originally packaged.
Are these suitable for high-precision or low-noise applications?
No. Carbon composition resistors have higher noise and lower value stability compared to modern film types. They are the right choice for vintage restoration, pulse-handling circuits, and applications where this material type was originally specified - not for precision measurement or low-noise audio design where tight tolerances matter.
Do the color bands match the stated specs?
Yes. Red-Red-Orange-Silver corresponds to 22k Ohm with 10% tolerance, matching the tab stamp and catalog designation exactly.
Somewhere between the bench drawer and a working vintage radio, these cards have been waiting for exactly this repair. Ten original Motorola resistors, right value, right material, right era - ready to go back to work.
