1491 Series Decade Inductor is the same as GenRad inductor decade.
The 1491 Decade Inductor is an assembly of several 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.
1491 Inductor Decade.
| Model | Description |
|---|---|
| 1491 | 1491 Series Decade Inductor |
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.
High-Q, 200 and above
These inductance decades are convenient 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 you need to vary circuit elements
over relatively wide
ranges 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.
| Inductance Per Step | |||||
|---|---|---|---|---|---|
| Model | 100 µH | 1mH | 10mH | 100mH | 1H |
| 1491-9704 1491-9707 |
N/A ±2% |
±2% ±2% |
±1.6% ±1.6% |
±0.8%
±0.8% |
±0.8%
±0.8% |