The 1492 model is an excellent choice for a highly accurate decade inductance substituter with a wide range. It is suitable for most laboratory and test applications.
The 1492 Inductance decade series 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. The 1492 Decade Inductors have values of low-frequency storage factor, Q, that are much larger than those of air-core coils.
The 1492 model is an excellent choice for a highly accurate decade inductance subsƟ tuter with a wide range. It is suitable for most laboratory and test applicaƟ ons.
Features:
• 7 decade switches ranging from 1 μH to 1 H increments
• Toroidal-core inductors
• High-accuracy: ±(1% + 0.75 μH)
GenRad 1492 Decade Inductor Basic Specifications (Full specifications can be found on datasheet)
Range:
7 decade inductor ranging from 1 µH to 1 H increments
Toroidal-core inductors for small mutual inductance and minimal effects from external fields
Accuracy ±(1% + 0.75 µH) at 1 kHz, 100 mV, 23°C, tested with Model 1689 Digibridge, Series circuit
Inductance per step | Total decade inductance | dc resistance per step | Representative Q Values | ||
at 100 Hz | at 1 kHz | at 10 kHz | |||
1 µH | 10 µH | 0.02 Ω | 0.026 | 0.20 | 2.00 |
10 µH | 100 µH | 0.07 Ω | 0.110 | 1.10 | 10.3 |
100 µH | 1 mH | 0.2 Ω | 0.340 | 3.40 | 30.0 |
1 mH | 10 mH | 0.8 Ω | 0.310 | 3.03 | 23.7 |
10 mH | 100 mH | 4 Ω | 2.76 | 18.6 | 70.4 |
100 mH | 1 H | 48 Ω | 1.29 | 12.6 | 90.6 |
1 H | 10 H | 85 Ω | 6.80 | 51.0 | 81.2 |
Zero inductance: < 0.75 µH
Terminals: Two 5-way, gold-plated, tellurium-copper binding posts with low thermal emf and low resistance, plus one binding post connected to case for shielding.
Switch type: Multiple solid silver contacts. To allow continuous rotation, a blank position is added on all decades.
Environmental conditions: Operating conditions: 10°C to 40°C; <50% RH
Storage: -40°C to 70°C
Mechanical: Dimensions: 43.9 cm W x 8.9 cm H x 10.2 cm D (17.3" x 3.5" x 4")
Weight: 2.4 kg (5.3 lb)
