GR
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IET Labs now own the GenRad Classic Product Line.  They are making manuals available for free downloading on their web site.  If you don't find what you need here, please check the IET web site.

1935 Catalog General Radio Parts and Accessories Catalog for 1935.  Compliments of John D. Farr, KC4ZXX.
1956 Catalog General Radio Catalog for 1956.   Compliments of John D. Farr, KC4ZXX.
1968 Catalog 1968 Catalog for General Radio Equipment.  Compliments of John D. Farr, KC4ZXX.
Microphones General Radio Microphones and Accessories Catalog.  Compliments of John D. Farr, KC4ZXX.
213-B and C Manual for the GR Model 213-B and 213-C Audio Oscillators.  Compliments of the GR Historical Society.
224 Operating Instruction for General Radio Type 224 Precision Wavemeters.  Compliments of Miguel Bravo Cos mbravoc@wanadoo.es
231-A Manual for the GR Model 231-A Audio Transformer. Compliments of The GR Historical Society.
247 W Manual for the GR Model 247 W Filter.  Compliments of The GR Historical Society.
268 Manual for the GR Model 268 Vario Coupler.  Compliments of The GR Historical Society.
269 Description and directions for use of the GR Model 269 Variometer.  Compliments of The GR Historical Society.
300 Manual for the GR Model 300 Amplifier Unit.  Compliments of The GR Historical Society.
377-B Manual for the GR Model 377-B Low-Frequency Oscillator.
Compliments of The GR Historical Society.
395-B Manual "How to Build the General Radio Raytheon 'B' Eliminator and Power Amplifier." Compliments of The GR Historical Society.
400 Manual for the GR Model 400 Power Amplifier and Plate Supply.  Compliments of The GR Historical Society.
405 Manual for the GR Model 405 Plate Supply.  Compliments of The GR Historical Society.
419-A Manual for the GR Model 419-A Rectifier-Type Wave-meter.
Compliments of The GR Historical Society.
544-B Manual for Model 544B Megohm Bridge.   Compliments of John D. Farr, KC4ZXX.
546-B Manual for the GR Model 546-B Microvolter.  Compliments of The GR Historical Society.
546-C Manual for the GR Model 546-C Audio Frequency Microvolter.
Compliments of The GR Historical Society.
561-D Manual for GR 561D Vacuum Tube Bridge.  Compliments of Jerry J. Ingordo, W2JI.
603-A Manual for the GR Model 603-A Standard-Signal Generator.
Compliments of The GR Historical Society.
604-B
604-C		 Manual for the GR Model 604-B and 604-C Test-Signal Generator.  Compliments of The GR Historical Society.
605-A Manual for GR 605A Standard Signal Generator.  Compliments of Jerry J. Ingordo, W2JI.
608-A Manual for the GR Model 608-A Oscillator.  Compliments of The GR Historical Society.
614-A Manual for the GR Model 614-A Selective Amplifier.  Compliments of The GR Historical Society.
614-C Manual for the GR Model 614-C Selective Amplifier.  Compliments of The GR Historical Society.
615-A Manual for the GR Model 615-A Heterodyne Frequency Meter.
Compliments of The GR Historical Society.
620-A Operating Instructions and Schematic for Type 620-A Heterodyne Frequency Meter and Calibrator.
Compliments of Stephen Schreppler, N4FFT.
625-A Manual for the GR Model 625-A Bridge.  Compliments of The GR Historical Society.
631 Manual for the GR Model 631 Strobotac.  Compliments of The GR Historical Society.
636-A Manual for the GR Model 636-A Wave Analyzer.  Compliments of The GR Historical Society.
644-A Manual for the GR Model 644-A Thermocouple.  Compliments of The GR Historical Society.
648-A Manual for the GR Model 648-A Strobolux.  Compliments of The GR Historical Society.
650-A Manual for General Radio 650-A Impedance Bridge.  Compliments of Dale H. Cook.
650-A & P1 Manual for the GR Model 650-A and 650-P1 Oscillator-Amplifier.  Compliments of The GR Historical Society.
667-A Manual for the GR Model 667-A Inductance Bridge.  Compliments of John D Farr, KC4ZXX.
675-M Manual for the GR Model 675-M Piezo-Electric Oscillator.
Compliments of The GR Historical Society.
707-A Manual for the GR Model 707-A Cathode-Ray Null Detector.  Compliments of The GR Historical Society.
713-B Manual for the GR Model 713-B Beat-Frequency Oscillator.
Compliments of The GR Historical Society.
715-A Manual for the GR Model 715-A Direct-Current Amplifier.
Compliments of The GR Historical Society.
716-C Manual for General Radio 716C Capacitance Bridge.  Compliments of M. Paggio, Italy
716-P4 Manual for the GR Model 716-P4 Guard Circuit.  Compliments of The GR Historical Society.
726-A Manual for the GR Model 726-A Vacuum-tube Voltmeter.
Compliments of The GR Historical Society.
731-B Manual for the GR Model 731-B Modulation Monitor.  Compliments of The GR Historical Society.
732-B
733-A
732-PI		 Manual for the GR Model 732-B Distortion and Noise Meter, 733-A Oscillator, and 732-PI Range Extension Filters.
Compliments of The GR Historical Society.
736-A Manual for the GR Model 736-A Wave Analyzer.   Compliments of The GR Historical Society.
740-B Manual for the GR Model 740-B Capacitance Test Bridge.
Compliments of The GR Historical Society.
760-B Manual for the GR Model 760-B Sound Analyzer.  Compliments of The GR Historical Society.
783-A Manual for the GR Model 783-A Output-Power Meter.  Compliments of The GR Historical Society.
804-B Manual for the GR Model 804-B UHF Signal Generator.  Compliments of The GR Historical Society.
805-D Manual for the GR Model 805-D Standard-Signal Generator.  Compliments of The GR Historical Society.
821 Manual for the General Radio 821-A Twin-T RF Bridge, circa late '30's. At the end of the file are pages from Radio Magazine, Nov 41 describing how to build such a bridge for amateur use.  Compliments of T. J. Lindsay, WA9QCW.
834-A Manual for the GR Model 834-A Electronic Frequency Meter.
Compliments of The GR Historical Society.
857-A Manual for the GR Model 857-A UHF Oscillator.  Compliments of The GR Historical Society.
869-A Manual for the GR Model 869-A Pulse Generator.  Compliments of The GR Historical Society.
874-G Manual for the GR Model 874-G Fixed Attenuators.
Compliments of The GR Historical Society.
874-LBA Manual for the GR 874-LBA and 874-LBB Slotted Lines.  Compliments of Morris Odell, VK3DOC.
874-LBA Manual for the GR Model 874-LBA, 874-LBB (Incomplete manual).  Compliments of The GR Historical Society.
916-A Manual for the General Radio 916-A Radio-Frequency Bridge.  Compliments of Roy Morgan, K1LKY and Walt Szachara, W2OKF.
916-AL Manual for the GR Model 916-AL Radio-Frequency Bridge.
Compliments of The GR Historical Society.
942-A Manual for the GR Model 942-A Output Transformer.  Compliments of The GR Historical Society.
1000-P6 Manual for the GR Model 1000-P6 Crystal Diode Modulator.  Compliments of The GR Historical Society.
1001-A Manual for General Radio 1001A Signal Radio. Compliments of Bob Bethman, N0DGN.
1001-A Manual for the GR Model 1001-A Standard-Signal Generator.  Second version.  Compliments of The GR Historical Society.
1021-A Operating Instructions for General Radio Type 1021-A/U (UHF) and 1021-A/V (VHF) Signal Generators.  Compliments of Jerry Ingordo, W2JI.
1025 Operating Instructions for General Radio Model 1025 Sweep Generator.  Compliments of Jerry J. Ingordo, W2JI.
1110-A Manual for the GR Model 1110-A Interpolating Frequency Standard.  Compliments of The GR Historical Society.
1142-A Manual for General Radio Frequency Meter and Discriminator.  Compliments of an unknown contributor.
1150-A Manual for the General Radio Type 1150-A Digital Frequency Meter.  Compliments of Jerry Ingordo, W2JI.
1157-B Manual for the General Radio Model 1157B 500 MHz Scaler.  Compliments of Jerry J. Ingordo, W2JI.
1201-C Manual for the GR Model 1201-C Unit Regulated Power Supply.  Compliments of The GR Historical Society.
1203-A Manual for the GR Model 1203-A Unit Power Supply.  Compliments of The GR Historical Society.
1203-B Manual for the General Radio Model 1203B Unit Power Supply.  Compliments of an unknown contributor.
1204-B Manual for the GR Model 1204-B Unit Power Supply.
Compliments of The GR Historical Society.
1205-B Manual for the GR Model 1205-B Adjustable Regulated Power Supply.   Compliments of The GR Historical Society.
1206-B Manual for the GR Model 1206-B Unit Amplifier.  Compliments of The GR Historical Society.
1208-B Manual for General Radio 208-B Unit Oscillator.  Compliments of Anthony (Tony) Strike G8AUX.
1209-B & BL Manual for General Radio 1209B and BL Oscillators.  Compliments of John D. Farr, KC4ZXX.
1210-B
1210-P1		 Manual for the General Radio 1210B and 1210P1 Oscillator and Discriminator.  Compliments of Jerry J. Ingordo, W2JI.
1210-C Manual for the General Radio Model 1210C Unit Oscillator.
Compliments of an unknown contributor.
1211-B Manual for the General Radio 1211B Oscillator Unit.  Compliments of Jerry J. Ingordo, W2JI. 
1211-C Manual for the General Radio 1211C Oscillator Unit.  Compliments of Jerry J. Ingordo, W2JI. 
1212-A Manual for the GR Model 1212-A Unit Null Detector.
Compliments of The GR Historical Society.
1213-D Manual for the GR Model 1213-D Time-Frequency Calibrator.
Compliments of The GR Historical Society.
1214 Manual for the General Radio 1214 Oscillator Unit.  Compliments of Jerry J. Ingordo, W2JI.
1215-B Manual for General Radio 1215-B Oscillator.  Compliments of John D. Farr, KC4ZXX.
1216-A Manual for the General Radio 1216-A IF Amplifier.  Compliments of Jerry J. Ingordo, W2JI.
1216-A High Resolution Operation and Service Manual for GR 1216-A IF Amplifier.  Compliments of John Griessen.
1217-A Manual for General Radio 1217-A Pulser.  Compliments of John D. Farr, KC4ZXX.
1217-B Manual for General Radio 1217-B Unit Pulse Generator. Compliments of Ken Kensington.
1217-C Manual for the GR Model 1217-C Unit Pulse Generator.
Compliments of The GR Historical Society.
1218-A Manual for GR 1218-A Unit Oscillator (900-2000 MHz).  Compliments of Jerry J. Ingordo, W2JI.
1230-A Manual for the GR Type 1230-A DC Amplifier and Electrometer.  Compliments of Jerry J. Ingordo, W2JI.
1231-B Manual for GR 1231B Amplilfier and Null Detector.  Compliments of Jerry J. Ingordo, W2JI.
1232-A Manual for G R 1232-A Tuned Amplifier and Null Detector.
DjVu version compliments of John D. Farr, KC4ZXX.
PDF version Compliments of Miles Anderson, K2CBY.
1232-P1 Manual for the GR Model 1232-P1 RF Mixer.  Compliments of The GR Historical Society.
1233-A Manual for the GR Model 1233-A Power Amplifier.  Compliments of The GR Historical Society.
1234 Manual for the GR Model 1234 Standing-Wave Meter.  Compliments of The GR Historical Society.
1238 Manual for the GR Model 1238 Detector.  Compliments of The GR Historical Society.
1263-B Manual for GR 1263-B Amplitude Regulating Power Supply.  Compliments of Jerry J. Ingordo, W2JI.
1264-A Manual for the GR Model 1264-A Modulating Power Supply.  Compliments of The GR Historical Society.
1267-A Manual for the GR Model 1267-A Regulated Power Supply.
Compliments of The GR Historical Society.
1269-A Operation and Service Manual for GR 1269-A Power Supply.  Compliments of John Griessen.
1302-A Manual for General Radio 1302A Oscillator.  Compliments of Jerry Ingordo, W2JI.
1304-A Manual for the GR Model 1304-A Beat Frequency Audio Generator.  Compliments of The GR Historical Society.
1307-A Manual for the GR Model 1307-A Transistor Oscillator.
Compliments of The GR Historical Society.
1308-A Manual for the GR Model 1308-A Audio Oscillator and Power Amplifier.  Compliments of The GR Historical Society.
1309-A Manual for the GR Model 1309-A Oscillator.  Compliments of The GR Historical Society.
1310-A Manual for the GR Model 1310-A Oscillator.  Compliments of The GR Historical Society.
1311-A Operation and service manual for the GR 1311-A Audio Oscillator.  Compliments of John Griessen.
1330-A Manual for the GR Type 1330-A Bridge Oscillator.
Compliments of Neil Sheldon, K7WK.
1360-A Manual for the GR Model 1360-A Microwave Oscillator.
Compliments of The GR Historical Society.
1362 Manual for the GR Model 1362 UHF Oscillator.  Compliments of The GR Historical Society.
1382 Manual for the GR Model 1382 Random-Noise Generator 20 Hz - 50 kHz.  Compliments of The GR Historical Society.
1390-B Manual for the GR Model 1390-B Random-Noise Generator.  Compliments of The GR Historical Society.
1391-B Manual for the GR Model 1391-B Pulse, Sweep, and Time-Delay Generator.  Compliments of The GR Historical Society.
1396-A Manual for the GR Model 1396-A Tone-Burst Generator.
Compliments of The GR Historical Society.
1398-A Manual for the GR Model 1398-A Pulse Generator.
Compliments of The GR Historical Society.
1412-BC Manual for the GR Model 1412-BC Decade Capacitor.  Compliments of The GR Historical Society.
1413 Manual for the GR Model 1413 Precision Decade Capacitor.  Compliments of The GR Historical Society.
1422 Manual for the GR Model 1422 Precision Variable Capacitor.  Compliments of The GR Historical Society.
1423 Manual for the GR Model 1423 Precision Decade Capacitor (Equivalent to IET HACS Series).  Compliments of The GR Historical Society.
1433 Manual and Parts List for the GR Model 1433 Series High-Accuracy Decade Resistor.  Compliments of The GR Historical Society.
1450 Manual for the GR Model 1450 Decade Attenuators.  Compliments of The GR Historical Society.
1482 Manual for the GR Series 1482 Standard Inductor (Method of Measurement).  Compliments of The GR Historical Society.
1491 Manual for the GR Model 1491 Precision Decade Inductor.
Compliments of The GR Historical Society.
1493 Manual for the GR Model 1493 Precision Decade Transformer.  Compliments of The GR Historical Society.
1501-A Manual for the GR Model 1501-A Light Meter.  Compliments of The GR Historical Society.
1521-B, -BQ1 Manual for the GR Model 1521-B, -BQ1 Graphic Level Recorders.  Compliments of The GR Historical Society.
1531-AB Manual for the GR Model 1531-AB Strobotac Electronic Stroboscope.  Compliments of The GR Historical Society.
1532-D Manual for the GR Model 1532-D Strobolume.  Compliments of The GR Historical Society.
1535-B Manual for the GR Model 1535-B Contactor.  Compliments of The GR Historical Society.
1536-A Manual for the GR Model 1536-A Photoelectric Pickoff.  Compliments of The GR Historical Society.
1537-A Manual for the GR Model 1537-A Photoelectric Pickoff.
Compliments of The GR Historical Society.
1538-A Manual for the GR Model 1538-A Strobotac Electronic Stroboscope.  Compliments of The GR Historical Society.
1539 Manual for the GR Model 1539 Stroboslave Stroboscopic Light Source.  Compliments of The GR Historical Society.
1542-9701 Manual for the GR Model 1542-9701 Electronic Stroboscope.  Compliments of The GR Historical Society.
1546 Manual for the GR Model 1546 Strobotac Digital Stroboscope.   Compliments of The GR Historical Society.
1551-B Manual for GR 1551-B Sound Level Meter.  Compliments of John D. Farr, KC4ZXX.
1551-C Manual for GR 1551C Sound Level Meter.  Compliments of John D. Farr, KC4ZXX.
1551-P1 Manual for GR 1551-P1 Condenser Microphone System.  Compliments of John D. Farr, KC4ZXX.
1556-B Manual for the GR Model 1556-B Impact-Noise Analyzer.  Compliments of The GR Historical Society.
1562 Manual for the GR Model 1562 Sound-Level Calibrator.
Compliments of The GR Historical Society.
1564-A Manual for the GR Model 1564-A Sound and Vibration Analyzer.  Compliments of The GR Historical Society.
1565-A Manual for the GR Model 1565-A Sound-Level Meter.
Compliments of The GR Historical Society. 
1565-B Manual for the GR Model 1565-B Sound-Level Meter.
Compliments of The GR Historical Society.
1601-A Manual for the GR Model 1601-A VHF Bridge.   Compliments of The GR Historical Society.
1602-B Manual for General Radio 1602-B Admittance Meter. Compliments of John D. Farr, KC4ZXX.
1603-A Manual for General Radio 1603-A Z-Y Bridge.  Compliments of John D. Farr, KC4ZXX.
1605-A Manual for Model 1605-A RF Impedance Comparator.  Compliments of John D. Farr, KC4ZXX.
1605-A Op Condensed Operating Instructions for the GR Model 1605-A, -AH Impedance Comparator.  Compliments of The GR Historical Society.
1606 Manual for Model 1606 RF Impedance Bridge.  Compliments of John D. Farr, KC4ZXX.
1607-A Operating Instructions for General Radio Type 1607-A Transfer-Function and Immittance Bridge.  Compliments of Jerry Ingordo, W2JI.
1608-A Manual for Model 1608-A Impedance Bridge.  Compliments of Jerry Ingordo, W2JI.
1611-B Manual for the GR Model 1611-B Capacitance Test Bridge.
Compliments of The GR Historical Society.
1612-A Manual for the GR Model 1612-A RF Capacitance Meter.
Compliments of The GR Historical Society.
1613 (P-582) Manual for the GR Model 1613 (P-582) Capacitance Bridge.  Compliments of The GR Historical Society.
1615 Manual for General Radio 1615 Capacitance Bridge.
Compliments of Jerry Ingordo, W2JI.
1616 Manual for the GR Model 1616 Precision Capacitance Bridge.  Compliments of The GR Historical Society.
1616 & 1621 Manual for the GR Model 1616 Capacitance Bridge and 1621 Capacitance Measuring System.  Compliments of The GR Historical Society.
1617 Manual for the GR Model 1617 Capacitance Bridge in four pdfs.   Compliments of The GR Historical Society.
1632-A Manual for the GR Model 1632-A Inductance Bridge.
Compliments of The GR Historical Society.
1633-A Manual for the GR Model 1633-A Incremental Inductance Bridge.  Compliments of The GR Historical Society.
1644-A Manual for 1644A Megohm Bridge.   Compliments of John D. Farr, KC4ZXX.
1650-A Manual for 1650-A Impedance Bridge.  (April 1964).  Compliments of Neal Belmuth.
1650-A Manual for the GR Model 1650-A Impedance Bridge.  (May 1966).  Compliments of The GR Historical Society.
1650-A Condensed Operating Instructions for the GR Model 1650-A Impedance Bridge. Compliments of The GR Historical Society.
1650-B Manual for 1650-B Impedance Bridge.  Compliments of John D. Farr, KC4ZXX.
1652-A Manual for 1652-A Resistance Limit Bridge.   Compliments of John D. Farr, KC4ZXX.
1654 Operating Instructions for General Radio Model 1654 Impedance Comparitor.  Compliments of Jerry J. Ingordo, W2JI.
1656 Manual for the GR Model 1656 Impedance Bridge.
Compliments of The GR Historical Society.
1657 Manual for the GR Model 1657 RLC Digibridge.
Compliments of The GR Historical Society.
1658 Manual for the GR Model 1658 RLC Digibridge in four pdfs.  Compliments of The GR Historical Society.
1659 Manual for the GR Model 1659 RLC Digibridge.
Compliments of The GR Historical Society.
1687 Manual for GR 1687 Megahertz LC Digibridge.  Compliments of Stepan Novotill.
1689 Manual for the GR Model 1689/1689M Precision RLC Digibridge.  Compliments of The GR Historical Society.
1690-A Manual for the GR Model 1690-A Dielectric Sample Holder.
Compliments of The GR Historical Society.
1692 Manual for the GR Model 1692 RLC Digibridge.
Compliments of The GR Historical Society.
1800-A Manual for the General Radio 1800-A VTVM.    Compliments of John D. Farr, KC4ZXX.
1806-A Manual for the GR Model 1806-A Electronic Voltmeter.
Compliments of The GR Historical Society.
1807 Manual for the GR Model 1807 DC Microvoltmeter and Nanoammeter.  Compliments of The GR Historical Society.
1840-A Manual for the GR Model 1840-A Output Power Meter.
Compliments of The GR Historical Society.
1862-A Manual for the GR Model 1862-A Megohmmeter.
Compliments of The GR Historical Society.
1862-B Manual for General Radio 1862-B Megohm Meter.   Compliments of John D. Farr, KC4ZXX.
1862-C Manual for General Radio 1862-C Megohmmeter.  (Sept. 1963).  Compliments of Bob Krassa, KC0TDS .
1862-C Manual for the GR Model 1862-C Megohmmeter. (July 1964).  Compliments of The GR Historical Society.
1863 & 1864 Manual for the GR Model 1863 and 1864 Megohmmeters.
Compliments of The GR Historical Society.
1900-A Operating instructions for General Radio Model 1900-A Wave Analyzer.  Compliments of Jerry J. Ingordo, W2JI.
1932-A Manual for the GR Model 1932-A Distortion and Noise Meter.  Compliments of The GR Historical Society.
1933 Manual for the GR Model 1933 Precision Sound Level Meter and Analyzer.  Compliments of The GR Historical Society.
1951-E Manual for the GR Model 1951-E Filter.  Compliments of The GR Historical Society.
1981-B Manual for the GR Model 1981-B Precision Sound Level Meter.  Compliments of The GR Historical Society.
1982 Manual for the GR Model 1982 Precision Sound Level Meter.  Compliments of The GR Historical Society.
1988 Manual for the GR Model 1988 Precision Integrating Sound Level Meter and Analyzer.  Compliments of The GR Historical Society.
C-10-H Manual for the GR Model C-10-H Secondary Frequency Standard.  Compliments of The GR Historical Society.
M Manual for the GR Model M2, M5, M10 and M20 Variac Autotransformers.  Compliments of The GR Historical Society.
W5 Manual for the GR Model W5 Adjustable Autotransformer.
Compliments of The GR Historical Society.
W5MT3 Manual for the General Radio W5MT3A, W5MT3W and W5MT3AW Metered Variacs.  Compliments of Bob Krassa.
W10 Manual for the GR Model W10 Adjustable Autotransformers.  Compliments of The GR Historical Society.