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GenRad Gen Rad Decade Inductance 1491-D Inductor Box Click to view supersized image Click to view supersized image Click to view supersized image Click to view supersized image GenRad Decade Inductor Box 1491-D Calibration Expired 1997, has not been used since * Shielded toroidal cores for small mutual inductance and minimal effect from external fields * Sealed against moisture for long term stability * Excellent as a moderately precise standard of inductance . The 1491 Decade Inductance Box is an assembly of several 940 Decade-Inductor Units in a single metal cabinet. The units have no electrical connection to the panel, but a separate ground terminal is provided, which can be connected to the adjacent low terminal, leading to the smallest decade. These inductance decades are convenient elements for use in wave filters, equalizers, and turned 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, that are much larger than those of air-core coils. This piece of equipment is from a room of electronics that was given to our local airport by a Navy Air Wing when it moved and our airport opened and took its place. This happened in 1994 - 1995. This equipment was stored in a conditioned room and has not been used since the airport recieved it. We recently purchased it from the airport. We are not the original purchaser of this item and we do not claim to possess any rights or guarantees that the original purchaser may have claimed from the original seller's or manufacturer's guarantees. Smart Services for Smart Sellers (please look at our rules and privacy policy) |
kathryndennis@machine--tools.com (Kathryn Dennis) for additional information. This email is used for forwarding to newsgroup user.
