Check the listing for details. General Radio GR 1490-D/1490D 11.11 h Decade Inductor/Inductance Standard. Condition: Used. Listed at 2749.99 USD. General Radio GR 1490-D 11.11 h Decade Inductor/Inductance Standard Comes with what you see in the pictures. If you don't see it, you probably won't get it. Specifications are from General Radio and may vary slightly due to upgrades, options, or revisions this unit may or may not have. This unit ships fully tested and guaranteed to work for 30-days, parts and labor, excluding freight. The Unit's Serial Number Tag Reads: Model Number: 1490-D Serial Number: 3708 Features: High values of storage factor Q, with maximum values above 200. Toroidal construction minimizes external magnetic fields, so that the coils can be stacked without errors from mutual inductance. The toroids are nearly astatic to external magnetic fields. Aluminum covers provide electrostatic shielding and mechanical protection. Wax dipping keeps out moisture. The switch is inherently reliable in extensive use and should not require bothersome cleaning or adjustment in service. Applications: THhse inductance decades are convient elements for use in wave filters, equalizers, and tuned circuits throughout the range of audio and low radio frequencies. As components in oscillators, analyzers, and similar equipment, they are especially useful during the preliminary design period, when the ability to vary circuit elements over relatively wide ranges is necessary to determine optimum operating values. As moderately precise standards of inductance they have values of low frequency storage factor, Q, which are much larger than those of air-cored coils. Description: Each Type 940 Decade-Inductor Unit is an assembly of four Type 1481 Inductors (relative values, 1, 2, 2, 5) wound on molybdenum-permalloy dust cores, which are combined by switching to give the elevent successive values from 0 to 10. The decade switch has high-quality ceramic stator-and-rotor members and utilizes a well-defined ball-and-socket detent. All contacts are made of a silver alloy and have a positive wiping action. The 1490 Decade Inductor is an assembly of three or four (this unit is four) Type 940 Decade-Inductor Units in a single metal cabinet. The units have have no electrical connection to the panel, but a separate ground terminal is provided which can be connected to the adjacent low terminal, which leads to the smallest decade. Brief Specifications: Total Inductance: 11.11 h in 0.001 h steps No. of Dials: 4 Dimensions: 8.5" W x 16.75" H x 5.5" D (215 mm x 425 mm x 140 mm) Weight: 21.75" For Domestic Customers: Packaging, handling, and order processing included in shipping in all domestic shipments as quoted by the shipping calculator. For International Customers there is a $25.00 minimum for packaging, handling, and order processing. International shipping to be determined by destination. Prior to shipment I will need to know the following information (filled out on a form that I will send you) for International Customers or Packages/Freight being Forwarded internationally. International customers may also be subject to a freight forwarder form if applicable.: (1) Are you the end-user of this item? (2) If you are not the ultimate end-user of the item, please state the ultimate end user's name. (3) What is the ultimate country destination? 05/14/22