874-D20
The General Radio 874-D20 Adjustable Stub was introduced in Catalog M (1951) and remained available through Catalog Q (1961).
The Type 874-D20 Adjustable Stub is used for matching or tuning, and use as reactive elements. Can be used with indicator and scale as reaction-type wavemeters. The stub consists of a sliding short circuit with multible-spring-finger type. The stub is operated by a baklite tube marked in centemeters.
The Type 874-D20 is similar to both 1602-P1 and 1607-P1 used with 1602-B Admittance Meter and 1607-A Immittance Bridge. The main difference is the markings on the bakelite tube. These device are matched to their respective instruments and share their serial numbers.
Specifications
- Characteristic Impedance: 50 Ω
- Maximum Travel: 20 cm
- Minimum Setting: 6 cm
