Product Overview
Victoreen RX4B-VICO 1.47 Megohm High-Voltage Hermetic Glass Resistor – NOS, July 1959, Original Sleeve
Condition
Unused NOS. Glass body is clean and pristine with no visible damage. Red-stamped markings legible: RX4B-VICO, 1.47MEG, part number 7611920. Original cardboard protective sleeve included; sleeve shows yellowing and light soiling consistent with age but remains intact. Manufacture date stamped 7/59 (July 1959). NSN 5905-578-4549 and contract number DA-36-038-ORD-20722 are stamped on the outer sleeve. Sourced from a maker's workshop collection clearout.
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Product Overview
Victoreen Instrument Co. RX4B-VICO – a 1.47 Megohm high-voltage hermetic glass resistor manufactured in Cleveland, Ohio, in July 1959. Carbon or metal oxide element sealed inside a clear glass envelope under vacuum or inert gas. Axial leaded, approximately 45mm body length. Power rating 1/2W to 1W. Assigned National Stock Number 5905-578-4549 under military contract DA-36-038-ORD-20722. Part number 7611920 is printed in red directly on the glass body.
Key Features
- Resistance: 1.47 Megohm (1.47MΩ), red-stamped on glass body
- Power rating: 1/2W to 1W
- Construction: Carbon or metal oxide element, hermetically sealed in clear glass envelope under vacuum or inert gas
- Package: Glass-encapsulated hermetic axial, approximately 45mm body length, fine wire axial leads
- Part number 7611920 and series designation RX4B-VICO stamped in red
- NSN 5905-578-4549, military contract DA-36-038-ORD-20722
- Manufactured July 1959, Victoreen Instrument Co., Cleveland, Ohio
- Original cardboard protective sleeve included
Applications
- Restoring a vintage Geiger counter or ionization chamber where the original high-voltage resistor has drifted, failed, or gone missing – the 1.47M value and hermetic glass construction match period circuit requirements that standard film resistors cannot meet
- Servicing tube-based physics instruments or survey meters built around Victoreen components, where dropping in a period-correct part keeps the circuit behaving exactly as designed
- Builders and experimenters constructing high-voltage detector circuits who want a hermetically sealed element that handles elevated rail voltages without the degradation risks of open-construction resistors
- Collectors building display sets of vintage Victoreen RX-series components – this unit comes with the original dated sleeve and contract markings fully intact
Frequently Asked Questions
Will this fit a Geiger counter or survey meter that originally used a Victoreen RX4B?
Yes. The part number RX4B-VICO, resistance value 1.47MEG, and axial hermetic glass package are confirmed by markings on both the resistor body and the original sleeve. Physical body length is approximately 45mm with fine wire axial leads.
What is the voltage rating?
A specific voltage rating figure is not confirmed in the available data. The RX4B-VICO is designated a high-voltage hermetic glass resistor by Victoreen, and its construction – element sealed under vacuum or inert gas in a glass envelope – is intended for elevated-voltage operation. Buyers should verify the voltage requirement of their specific circuit against the RX series rating for their application.
Is the original sleeve included?
Yes. The original cardboard protective sleeve is included. It carries the NSN, part number, contract number, manufacturer name, and the July 1959 date stamp. The sleeve shows age-related yellowing and light soiling; the resistor itself is clean and pristine.
What is the tolerance?
Tolerance is not confirmed for this specific unit. The markings on the body and sleeve do not state a tolerance value.
Sixty-five years in that cardboard sleeve, and the glass is still clean. Whatever circuit has been waiting on this value, the wait is over.
