General Radio 1433-T

Price : $ 374
  •  Equipment Location : USA
Description:
General Radio 1433-T 5-Decade Resistor 0 to 1,111.1 ohms in 0.01 Ohm Steps 0.01%

Manufacturer: General Radio GenRad

Model: 1433-T

Condition: Used. This resistor is in Good cosmetic condition for its age, with several small scuffs/scratches that will not affect function.   The white behind the 100Ω steps knob is cracking more than the rest, but this does not affect function. The photos show the exact item(s) the buyer will receive.

Notes: This decade resistor is in Good working condition. We checked it against our bench meter in 4-wire ohms mode and all positions are very close to nominal and well within tolerance. The 0.1/step knob has a tiny squeak and has a higher resistance to turning than the other steps, which all feel normal to us.  No other testing was done. No manuals, cords/cables, or additional items are included if not listed or shown.

Included:

  • (1) GenRad 1433T Decade Resistor

Specifications:

  • Manufacturer: General Radio Company
  • Model: 1433-T
  • Precision decade resistor
  • Intended for checking accuracy of resistance-measuring devices (lab-grade working standard)
  • 5 Decades of resistance:
    • 0.01Ω to 0.1Ω 4A max. (40mV max.)
    • 0.1Ω to 1Ω 1.6A max. (160mV max.)
    • 1Ω to 10Ω 800mA max. (800mV max.)
    • 10Ω to 100Ω 250mA max. (2.5V max.)
    • 100Ω to 1kΩ 80mA max. (8V max.)
  • (5) Decade Resistance Units in an Aluminum housing
  • Each decade has 11 positions, dial values overlap
  • Positive detents at each position
  • Quadruple-leaf bushes bear on lubricated solid silver alloy contacts for long life, low resistance
  • Series circuit, total resistance is the sum of all dials
  • Current rating is the lowest of any dial in use (not set to 0)
  • Resistors are electrically and mechanically isolated from housing (rated 2kV to case max.)
  • Shield terminal and movable link allow user to "ground" one side of the circuit
  • Binding post terminals (5-way gold-plated tellurium copper)
  • Modular construction is repairable
  • Optional rear output access panel is installed
  • Optional 16.5"-wide rack mounting tabs are installed
  • Low zero resistance (label says 0.0045Ω)
  • High accuracy (rating: 0.01%)
  • Low temperature coefficients (rated +/-5 to 20 ppm/ºC)
  • Low thermal emf to copper
  • Excellent stability (rated +/-25 to 75 ppm/3 years)
  • Unaffected by humidity

30 Day Guarantee

  • Guaranteed to be as described
  • Can be returned for flaws or malfunctions that were not disclosed
  • See complete terms


SKU: Q31D008
Current Stock: 1

PRODUCT SPECS

(From Used-Line T&M Specifications )
Status -

The 1433 Decade Resistors are primarily intended for precision measurement applications where their excellent accuracy, stability, and low zero resistance are important. They are convenient resistance standards for checking the accuracy of resistance-measuring devices and are used as components in dc and audio-frequency impedance bridges. Many of the models can be used up into the radio-frequency range.

IET continues to produce the 1433 Series Decade Resistors to the same exacting specs as GenRad. These Decade Resistors are primarily intended for precision measurement applications where their excellent accuracy of ±0.01%, stability, and low zero resistance are important.

The individual decades (0510 Decade-Resistance Units) are available for applications requiring only one decade or as components to be built into experimental equipment, production test equipment, or commercial instruments.

The 1433 Decade Resistor is an assembly of 0510 Decade-Resistance Units in a single cabinet. Mechanical as well as electrical shielding of the units and switch contacts is provided by the attractive aluminum cabinet and panel. The resistance elements have no electrical connection to the cabinet and panel, for which a separate shield terminal is provided.

Each Type 0510 Decade-Resistance Unit is enclosed in an aluminum shield, and a knob and etched-metal dial plate are supplied. Each decade has ten resistors in series; the contacts in the lower-valued decades have a silver overlay to ensure stability of resistance, and all the decades have a silver contact on the zero setting to give low and constant zero resistance. Winding methods are chosen to reduce the effects of residual reactances.

  • Precision accuracy of +0.01% up to 10 MΩ
  • Resistance range from 1 mΩ to 111.11111111 MΩ
  • 36 models available, 3 to 11 dials
  • Dust proof, long life switches with solid silver contacts
  • Good frequency characteristics
  • Low temperature coefficient
  • Excellent stability
  • Low zero resistance
  • Rackmount option available

Decade resistors:

  • Catalog number 1433-01  
    • Total ohms: 1.11
    • Resolution (ohms): 0.001
  • Catalog number 1433-00 (Letter model number: 1433-U)
    • Total ohms: 111.1
    • Resolution (ohms): 0.01
  • Catalog number 1433-02 (Letter model number: 1433-K)
    • Total ohms: 1,111
    • Resolution (ohms): 0.1
  • Catalog number 1433-04 (Letter model number: 1433-J)
    • Total ohms: 11,110
    • Resolution (ohms): 1
  • Catalog number 1433-06 (Letter model number: 1433-L)
    • Total ohms: 111,100
    • Resolution (ohms): 10
  • Catalog number 1433-08 (Letter model number: 1433-Q)
    • Total ohms: 1,111,000
    • Resolution (ohms): 100
  • Catalog number 1433-09
    • Total ohms: 11,110,000
    • Resolution (ohms): 1000
  • Catalog number 1433-09A
    • Total ohms: 111,100,000
    • Resolution (ohms): 10000
  • Catalog number 1433-10A
    • Total ohms: 111.11
    • Resolution (ohms): 0.001
  • Catalog number 1433-10 (Letter model number: 1433-T)
    • Total ohms: 1,111.1
    • Resolution (ohms): 0.01
  • Catalog number 1433-12 (Letter model number: 1433-N)
    • Total ohms: 11,111
    • Resolution (ohms): 0.1
  • Catalog number 1433-14 (Letter model number: 1433-M)
    • Total ohms: 111,110
    • Resolution (ohms): 1
  • Catalog number 1433-16 (Letter model number: 1433-P)
    • Total ohms: 1,111,100
    • Resolution (ohms): 10
  • Catalog number 1433-18 (Letter model number: 1433-Y)
    • Total ohms: 11,111,000
    • Resolution (ohms): 100
  • Catalog number 1433-18A
    • Total ohms: 111,110,000
    • Resolution (ohms): 1000
  • Catalog number 1433-19
    • Total ohms: 1,111.11
    • Resolution (ohms): 0.001
  • Catalog number 1433-20 (Letter model number: 1433-W)
    • Total ohms: 11,111.1
    • Resolution (ohms): 0.01
  • Catalog number 1433-22 (Letter model number: 1433-X)
    • Total ohms: 111,111
    • Resolution (ohms): 0.1
  • Catalog number 1433-24 (Letter model number: 1433-B)
    • Total ohms: 1,111,110
    • Resolution (ohms): 1
  • Catalog number 1433-26 (Letter model number: 1433-Z)
    • Total ohms: 11,111,100
    • Resolution (ohms): 10
  • Catalog number 1433-27
    • Total ohms: 111,111,000
    • Resolution (ohms): 100
  • Catalog number 1433-28
    • Total ohms: 11,111.11
    • Resolution (ohms): 0.001
  • Catalog number 1433-29 (Letter model number: 1433-F)
    • Total ohms: 111,111.1
    • Resolution (ohms): 0.01
  • Catalog number 1433-31 (Letter model number: 1433-G)
    • Total ohms: 1,111,111
    • Resolution (ohms): 0.1
  • Catalog number 1433-33 (Letter model number: 1433-H)
    • Total ohms: 11,111,110
    • Resolution (ohms): 1
  • Catalog number 1433-34
    • Total ohms: 111,111,100
    • Resolution (ohms): 10
  • Catalog number 1433-35
    • Total ohms: 111,111.11
    • Resolution (ohms): 0.001
  • Catalog number 1433-36
    • Total ohms: 1,111,111.1
    • Resolution (ohms): 0.01
  • Catalog number 1433-37
    • Total ohms: 11,111,111
    • Resolution (ohms): 0.1
  • Catalog number 1433-38
    • Total ohms: 111,111,110
    • Resolution (ohms): 1
  • Catalog number 1433-39
    • Total ohms: 1,111,111.11
    • Resolution (ohms): 0.001
  • Catalog number 1433-39A
    • Total ohms: 11,111,111.1
    • Resolution (ohms): 0.01
  • Catalog number 1433-39B
    • Total ohms: 111,111,111
    • Resolution (ohms): 0.1
  • Catalog number 1433-40A
    • Total ohms: 11,111,111.11
    • Resolution (ohms): 0.001
  • Catalog number 1433-40
    • Total ohms: 111,111,111.1
    • Resolution (ohms): 0.01
  • Catalog number 1433-41
    • Total ohms: 111,111,111.11
    • Resolution (ohms): 0.001

1433 specifications (for 1 mΩ - 10 MΩ resistance per step):

  • Total decade resistance: 10 mΩ, 100 mΩ, 1 Ω, 10 Ω, 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ, 1 MΩ, 10 MΩ, 100 MΩ
  • Maximum current per decade: 8 A, 4 A, 1.6 A, 0.8 A, 0.25 A, 80 mA, 23 mA, 7 mA, 2.3 mA, 0.7 mA, 0.1 mA
  • Maximum voltage per step: 5 mV, 40 mV, 0.16 V, 0.8 V, 2.5 V, 8 V, 23 V, 70 V, 230 V, 700 V, 1000 V
  • Maximum power in W/step: 0.04, 0.16, 0.25, 0.6, 0.6, 0.6, 0.5, 0.5, 0.5, 0.5, 0.1
  • Accuracy (the difference between resistance setting and the value at zero setting) at 23°C; traceable to SI:
    • ≤1 MΩ steps: ±(0.01% + 2 mΩ)
    • 10 MΩ steps: ±0.03%
  • Zero Resistance
    • ≤1 MΩ decades: <1 mΩ per decade at dc
    • 10 MΩ decade: ≈3 mΩ at dc
  • Typical Value of Zero Impedance: Zero Resistance (Ro). Proportional to square root of frequency above 100 kHz:
    • <0.001 Ω/decade at dc
    • 0.04 Ω/decade at 1 MHz
  • Switch Capacitance: <1 pF between contacts
  • Zero Inductance (Lo): 0.1 μH/decade + 0.2 μH
  • Maximum voltage to case: 2000 V peak

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