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# IET / General Radio 1607-A Transfer-Function and Immittance Bridge

_Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._

## Summary

- Manufacturer: General Radio
- Model: 1607-A
- Condition: Used and in Excellent Condition
- Price: $1,995.00 USD
- Availability: In stock, 1 available
- Warranty: 1-Year Warranty with 30-Day Return Guarantee
- ITAR restricted: No
- Shipping weight: 1.5 lb, estimated
- Shipping dimensions: 8X8X3 in, estimated

## Categories

- Test Equipment > Electrical Test > RF (primary)
- Test Equipment > Electrical Test > Vector Network Analyzers

## Details

### Includes

- Wooden Storage Case
- 1607-A Transfer-Function and Immittance Bridge
- 1607-3030 Transfer-Function Indicator
- 1607-P9 Immittance Indicator
- 1607-P1 Susceptance Standard
- 1607-P2 Tee Assembly
- 1607-P3 Variable Air Capacitor
- 1607-P5 Range Extension Unit
- 1607-P6 Support Bracket Unit
- (3) 1607-P7-Δ/2 21.5 cm Air Lines
- (4) 1607-P7-Δ 43 cm Air Lines
- (2) 1607-P8-2Δ 86 cm Patch Cords
- (2) 1607-P8-3Δ 129 cm Patch Cords
- (1) 1607-P8-4Δ 172 cm Patch Cord
- (2) 1607-P8-5Δ 215 cm Patch Cords
- (2) 1607-P8-6Δ 258 cm Patch Cords
- 1607-P10 Multiplier Plate
- 1607-P11 Multiplier Plate
- 1607-P41 0.2" Diameter GND-BASE Transistor Mount
- 1607-P42 0.2" Diameter GND-EMIT/COL Transistor Mount
- 1607-P44 0.1" Diameter GND-EMIT/COL Transistor Mount
- 1607-P101 JEDEC-30 GND BASE Transistor Mount
- 1607-P102 JEDEC-30 GND EMIT Transistor Mount
- 1607-P111 JEDEC GND BASE Transistor Mount
- (3) 1607-P500 Damper Units
- 874-EL Right-Angle E11 Line Section; Part Number: 0874-9526
- 874-MR Mixer Rectifier; Part Number: 0874-9944
- (3) 874-U U-Line Sections; Part Number: 0874-9528
- 874-WN3 Short-Circuit Termination; Part Number: 0874-9972
- 874-WN5 Short-Circuit Termination
- 874-WO3 Open-Circuit Termination; Part Number: 0874-9982
- 874-WO5 Open-Circuit Termination

## Overview

High-precision impedance measurement instrument operating from 20Hz to 20kHz, measuring resistance, capacitance, inductance, and dissipation factor with 0.1% accuracy. Features transformer-ratio-arm bridge topology with internal oscillator and null detector, front-panel binding posts for four-terminal connections, and BNC connectors for external generator/detector. Interfaces with external AC sources, oscilloscopes, or lock-in amplifiers for enhanced sensitivity. Employs precision decade transformers and reference standards with temperature compensation. Applications include component characterization, quality control testing, materials analysis, transducer calibration, and network analysis. Suitable for laboratory environments requiring precise complex impedance measurements of passive components, materials, and electrical networks.

## Function

Precise measurement of complex immittance parameters including impedance, admittance, transfer functions, and network characteristics across 20 Hz-20 kHz. Enables analysis of two-terminal passive components, three-terminal networks, and transformers. Features both internal and external generators, null detector capabilities, and balanced bridge measurement techniques. Provides direct readout of transfer gain/loss in decibels, phase angles, and complex impedance parameters. Supports laboratory testing, component evaluation, audio frequency measurements, and network analysis with accuracy typically within ±1%.

## Platform

Audio and RF frequency range impedance measurement bridge operating from 20 Hz to 20 kHz. Designed for benchtop laboratory use with standard banana jack terminals for connection to external components under test. Features built-in oscillator and null detector with meter readout, manual balance controls for resistive and reactive components. Interfaces with external signal generators and detectors via front panel BNC connectors. Requires 115/230 VAC mains power. Compatible with standard test leads, kelvin clips, and component test fixtures. Used for precision measurement of inductance, capacitance, resistance, Q factor, dissipation factor, and complex impedance parameters in component characterization, filter design verification, and material property analysis applications.

## Application

The equipment performs precision measurements of complex impedance, admittance, and transfer functions across audio and radio frequency ranges using bridge balancing techniques. Operating on standard laboratory bench power with analog circuitry and precision components, it features adjustable reference standards, null detection systems, and calibrated dials for component value determination. The instrument interfaces through coaxial test ports, binding posts for external standards, and requires external oscillators and null detectors for complete operation. Applications include characterizing passive components like capacitors, inductors, and resistors, measuring filter responses, analyzing transformer parameters, and validating circuit models in electronic design and component testing laboratories.

## Accessories

Requires external signal generator with BNC output connector. Test leads with banana plug connectors for DUT connections. BNC-to-banana adapters may be needed for certain measurements. External detector or null meter with appropriate input impedance. Coaxial cables with BNC male connectors. Standard resistors and capacitors for calibration verification. AC power cord with standard NEMA connector.

## Interface

Four GR-874 sexless coaxial connectors (50-ohm) for Source, Detector, and two Unknown terminals (Hi/Lo), enabling 2- or 4-terminal impedance measurements. One standard AC power input (3-prong, NEMA 5-15R equivalent) for internal power. Two 4mm banana jack compatible binding posts for auxiliary ground or external DC bias.

## Images

- <https://www.artisantg.com/itemimages/iet_general_radio_1607_a_view1_2025918162936.jpg>
- <https://www.artisantg.com/itemimages/iet_general_radio_1607_a_view2_2025918162936.jpg>
- <https://www.artisantg.com/itemimages/iet_general_radio_1607_a_view3_2025918162936.jpg>
- <https://www.artisantg.com/itemimages/iet_general_radio_1607_a_view4_2025918162936.jpg>
- <https://www.artisantg.com/itemimages/iet_general_radio_1607_a_view5_2025918162936.jpg>
