1401
The General Radio 1401 Series Standard Air Capacitors was introduced in Catalog M (1951) and remained available through Catalog S (1965).
The Type 1401 series is comprised of four capacitor types − 1401-A, 1401-B, 1401-C, and 1401-D. They are two-terminal air capacitors designed as laboratory reference or working capacitance standards. They feature all-aluminum construction with shielded covers. Connections are Type 274 plugs spaced ¾ inches on center. This spacing matches the Type 716-C Capacitance Bridge, making the 1401s useful as balancing capacitors when performing substitution measurements.
Specifications
- Stability: Capacitance change is less than 0.05% per year
- Residual Impedances: The series inductance of all units is approximately 0.05 μH
- Temperature Coefficient of Capacitance: Typically 10 to 20 ppm/C° between 20° and 70°C
- Terminals: Type 274 plugs, spaced ¾ inch on centers, to plug into Type 938 binding posts
Links
| Type | Insertion Capacitance | Initial Accuracy | Peak Volts | Dissipation Factor | Catalog Number |
|---|---|---|---|---|---|
| 1401-A | 100 pF | 0.2% | 1500 V | 0.0001 | 1401-9701 |
| 1401-B | 200 pF | 0.15% | 1200 V | 0.00005 | 1401-9702 |
| 1401-C | 500 pF | 0.12% | 900 V | 0.00002 | 1401-9703 |
| 1401-D | 1000 pF | 0.1% | 700 V | 0.00001 | 1401-9704 |
