Description
U.S. Navy DB-6 Guided-Missile-Launcher Diode Board, P/N 1677905-G2, NSN 1440-00-672-3764
Item Overview
This U.S. Navy DB-6 assembly board is an electronic component from a guided-missile-launcher system. It was modified at Naval Ordnance Station Louisville, Kentucky, in February 1974 under ORDALT 6134-A. The board contains repeated diode-and-resistor circuits used within launcher-control equipment. It is not a missile, guidance unit, fuze, or explosive component.
Identification and Features
The board retains its Navy identification, alteration marking, and electronic components. Federal Supply Class 1440 identifies the parent equipment as a guided-missile launcher.
- Item: DB-6 assembly board
- Part or drawing number: 1677905-G2
- Revision: H
- NSN: 1440-00-672-3764
- Federal Supply Class: 1440, Guided Missile Launchers
- Alteration: ORDALT 6134-A
- Modification location: Naval Ordnance Station Louisville, Kentucky
- Modification date: February 7, 1974
- Diodes: JAN 1N441B silicon rectifier diodes
- Resistors: Dale RN70D 3922F 39.2-kΩ precision resistors
- Associated paperwork: Records seven boards declared excess and routed to Fort Knox
- Status: Non-explosive military-surplus electronic assembly
Probable Circuit Function
The repeated diode-and-resistor sections indicate that the board served several similar electrical channels. The diodes could direct current, separate circuits, or block reverse voltage, while the precision resistors controlled electrical levels. This layout is consistent with a launcher relay, sequence-control, safety-interlock, steering, or clamping network.
Launcher-System Application
The NSN confirms that this board belonged to guided-missile-launcher equipment rather than the missile itself, The Mk 11 Tartar launching system and its Missile Launching System Control Mk 9 equipment. However, Mk 10 Terrier and Mk 13 Tartar equipment cannot be excluded.
Historical Background
Cold War Navy missile launchers combined mechanical loading equipment with electrical controls, relays, switches, and safety interlocks. These circuits helped control missile selection, magazine movement, launcher position, loading, and firing sequences. Tartar and Terrier systems equipped guided-missile destroyers and cruisers that protected Navy formations from aircraft and other threats. An ORDALT was an authorized change to Navy ordnance equipment, and the 1974 marking shows that this board was updated during its service life.
Documentation Note
The National Archives ordnance-manual index lists OP 2593-IPB, Volume 4, an illustrated parts breakdown for Missile Launching System Control Mk 9 Mods 0 and 1 for Tartar equipment. That undigitized volume is a promising source for identifying drawing 1677905-G2, but no publicly available parts plate currently proves the exact launcher installation. The essential identification as a Navy guided-missile-launcher electronic board is supported by its NSN and surviving markings.
Condition
This is an original military-surplus electronic assembly that was modified in 1974 and later declared excess. It may show dust, oxidation, discoloration, worn markings, bent leads, aged coatings, storage wear, or other signs of handling and age. The electrical components have not been tested, and the board is offered for collecting, research, restoration reference, or display. This listing is for one DB-6 assembly board only; launcher equipment, missiles, cabinets, wiring, and other components are not included unless specifically stated.
Ideal For
This unusual board is well suited for collections and exhibits covering U.S. Navy missile launchers, Cold War naval electronics, and historical fire-control equipment.
- U.S. Navy electronics collections
- Guided-missile-launcher displays
- Tartar and Terrier system research
- Cold War naval exhibits
- Vintage circuit-component study
- Military museums and educational displays
Approx length 8", Approx width 2", Approx height 2", Approx weight lbs.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item’s general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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