Product Overview
Motorola 100k Ohm 1/4W 10% Carbon Resistor File Card - 10 NOS Units for Vintage Restoration
Condition
Unused NOS. Card shows light wear on edges and surface scuffing consistent with storage; resistors are unsoldered and unused. Sourced from an electronics distributor consolidating inventory. Motorola branding, catalog number, and value markings are legible on the card tab.
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Product Overview
Motorola file card pack of 10 axial-lead resistors, 100k Ohm, 1/4W, 10% tolerance. Part number 6-124C29 on the card tab. Brown-bodied resistors taped to the card face in the original configuration. A preserved NOS card from an era when Motorola supplied the components behind countless radios, instruments, and communication systems.
Key Features
- Resistance: 100k Ohm (100,000 Ohms)
- Power rating: 1/4W (0.25W)
- Tolerance: 10%
- Quantity: 10 resistors per card
- Package: Original Motorola file card format
- Axial lead configuration, brown body
- Motorola branding and catalog number legible on card tab
Applications
- Desoldering a failed resistor from a vintage tube radio and dropping in a period-correct Motorola replacement - same value, same look, same era
- Restoring a classic Motorola car radio or communication receiver where original component types matter to the repair
- Stocking a ham radio workbench with NOS resistors for repairs to older transceivers and receiver circuits
- Building or modifying retro electronics projects where vintage carbon resistor aesthetics are part of the design intent
- Keeping a small collection of correct-era components on hand for tube amplifier repairs where carbon composition characteristics are preferred
Frequently Asked Questions
Are these resistors new or have they been used?
Unused NOS - still on the original Motorola file card, unsoldered, in the same configuration as when they left the distributor. The card shows normal storage wear; the resistors themselves have not been installed or tested in a circuit.
Is 10% tolerance acceptable for most vintage restoration work?
Yes, for the vast majority of vintage radio, amplifier, and communication equipment repairs. Original schematics for equipment from that era were designed around 10% carbon resistors. For precision measurement or audio circuits requiring tighter tolerances, buyers should confirm the requirement before ordering.
What is the card part number and what markings are on it?
The card tab is marked 6-124C29 with the value stamp confirming 100k Ohm, 10% tolerance, and 1/4W rating. The card reverse shows part number 54-84066A05 and an EIA color code chart.
Do these work as modern resistor replacements, or only for vintage gear?
Electrically, a 100k Ohm 1/4W 10% resistor works wherever those specs fit the circuit - vintage or modern. The Motorola brand and file card format are primarily of interest to restorers and collectors, but the component itself is a standard passive value with broad applicability.
Ten resistors on one card, every one of them waiting for the circuit that needs them. Someone out there has a vintage radio on the bench and a gap where a 100k used to be.
