This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Collection Item Summary:
This device is a traveling wave tube (TWT), built by Martin Marietta in the early 1990s for the BS-3N communications satellite, owned by the Japanese NHK television company.
TWTs have been and remain a critical technology for communications satellites in geostationary orbit. After a satellite receives a signal, processes it, and then prepares to transmit it, the satellite must first amplify the signal to ensure that it arrives at a receiving antenna on Earth with sufficient strength and integrity. Typical TWTs can amplify a signal by a factor of 100,000 to 1,000,000.
Lockheed Martin donated this artifact to the Museum in 1998.
Collection Item Long Description:
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- Non-magnetic white metal
- Anodized Coating
- Cadmium Plating
- Synthetic Fabric
- Synthetic Rubber
- Gold Plating
- 3-D (Larger Black Box): 34 × 8.7 × 13.7cm, 2.7kg (1 ft. 1 3/8 in. × 3 7/16 in. × 5 3/8 in., 6lb.)
- 3-D (Smaller Black Box): 35.6 × 5.9 × 3.7cm, 0.7kg (1 ft. 2 in. × 2 5/16 in. × 1 7/16 in., 1.5lb.)