General Radio Equipment
General Radio Model 1840-A-GRY "Digi-Bridge"
(EQP) GR-1840A
General Radio Model 1840-A-GRY "Digi-Bridge" automatic digital LCR test system. Type 1840-A output power meter is basically a multi-tapped audio-frequency transformer with a fixed secondary load. The fixed secondary load is reflected to eight identical primary windings. A front panel switch connects the eight primary coils in four different series and parallel combinations, and each primary combination is used with any one of six secondary taps, thus providing 24 different primary impedances. Each of these 24 impedances can in turn be multiplied by 250 with a second front panel switch. The end result is a total of 48 primary impedances. The use of grain-oriented silicon steel in a laminated core yields a 20-watt rating with a relatively small core. Interleaving of primary windings with secondary windings in two separate PI's permits measurements from 20 to 20,000 cps. Measures: 8" x 12" x 4"H. Includes copy of the operation manual.
$489 each
General Radio Precision Capacitor-Two Section
(EQP) GR-722-D
General Radio precision capacitor-two section 0-110pF & 0-1150 pF, terminals for high and low area, scale correction schedule available, adjustable air condenser covered by a copper insulated box. Table model. 9-1/8"L x 8"W x 6-3/4"H.
$350
Megohm Meter
(EQP) GR-1862B
General Radio Megohm meter. Consists of a regulated power supply, a complement of resistance standards and a balanced DC, vacuum-tube voltmeter with very high input resistance. Test voltages available are 100v DC and 500v DC. Resistance range 0.5 megohm to 2 t-ohm at 500v; 0.5 megohm to 0.2 t-ohm at 100v. 6 decade ranges. Accuracy is ±3% of indication at low resistance of each decade to ±12% (accuracy to which scale can be read) at high resistance end up to 50,000 megohm; possible additional ±2% error at top decade. The voltage can be removed from terminals by setting of either switch to discharge position. 9" x 9.5" x 11"H.
$389
General Radio Flash Delay
(EQP) GR1531-P2
General Radio flash delay. Rtime delay range 100 usec to 0.8 seconds in 3 overlapping ranges. Continuously adjustable on each range. 13v output pulse, 105.0 to 125.0 or 210.0 to 250v. 50 to 400 Hz operating power. NSN: 6625-00-467-0907.
$125
General Radio Tone Burst Generator
(EQP) GR-1396A
General Radio tone burst generator input frequency range: dc to 500kc. Open/closed intervals can be set for: 2, 4, 8, 16, 32, 64, or 128 periods. Minus one interval: 1, 3, 7, 15, 63, or 127 periods. Output (Gate open) ±7 volts, switching transients: less than 40 millivolts, gating output: rectangular wave form ±12 volts*comes with data sheet. Excellent condition.
$250 each
General Radio Precision Capacitor
(EQP) GR-722-NQ
General Radio precision capacitor. 0-1100 pF. Includes scale correction chart. Binding post terminals. 9-1/8"L x 8-1/8"W x 6-3/4"H.
$275 each
General Radio Meg Ohm Meter
(EQP) GR-1861-A
General Radio meg ohm meter. Meg scales .01, 1, 10, 100, 1000, & infinity. 115v AC input. 8" x 10" x 5"H.
$500
General Radio Audio Frequency Microvolter
(EQP) GR-546-C
General Radio audio frequency microvolter a calibrated attenuator/voltage divider supplies small, accurate voltages to oscillator creating a signal generator. .5µV to 1.0V with 2.2V input.
$275
General Radio
(EQP) GR-1450-TB
General Radio Type 1450. Decade attenuator. 600 Ω, 111db rack mount.
$349
General Radio Component Test Fixture
(EQP) GR1683-P1
General Radio component test fixture. 1683 - P1.
$80
General Radio Standard Capacitor
(EQP) GR-509-R
General Radio type 509-R standard capacitor. 0.05uf ± 0.25℅. 3 3/16"W x 6"L x 2 3/8"H.
$165
General Radio Output Power Meter
(EQP) GR-583-A
General Radio output power meter for audio-frequency circuits. 7-1/4" x 10-1/2" x 4-1/2" deep. A functional adjustable load impedance with a volt meter calibrated in watts dissipated in the lead. Dy cell cord.
$279
Vintage General Radio Variable Wire Wound Resistor
(RWV) 544-314
Vintage General Radio variable wire wound resistor. Inductive, 37.8 ohms, 1%. Phenolic core, 3 solder tabs. 2.78"L x 2.12"W x 0.095" thickness. Sealed in Mil-spec package. DC: 12/1965. Alt. P/N: 0544-3140. NSN: 5905-00-858-7210. NOTE: Part of resistor assembly in General Radio 544-B Megohm bridge.
$10 each
Pulse Transformer
(TPA) 1531-2000
Mil-spec pulse transformer with resistor. Enclosed. OEM part for Genrad 1531-AB series stroboscope. 2 threaded hole mount, 4 turret terminals. 1 primary and 1 secondary winding. No other specs available. 1.5"L x 1.5"W x 1"H. DC: 9/86. NSN: 5950-00-772-5672.
$89 each
Constant Impedance Trombone Line
DC-2 GHz / 50 ohm
DC-2 GHz / 50 ohm
(RF) 874-LTL
General Radio constant impedance trombone line. Type 844 LTL. DC-2 GHz, 50 ohm. 44 cm (half wavelength @ 340 MHz) adjustment. SWR: < 1.10 to GHz, < 1.25 to 2 GHz. 24" x 33"L (61 - 83 cm), 1.1875" (30 mm) spacing between centers. NSN: 5985-00-922-6219.
$375
General Radio GR900 Precision Tuner
1 - 8.5 GHz / 50 ohm
1 - 8.5 GHz / 50 ohm
(RF) GR900-TUA
General Radio GR900 precision tuner. Use to match out small residual reflections in low, SWR measuring instruments. 1 - 8.5 GHz, 50 ohm. GR900 connectors.
$575
General Radio 1021-A
Standard Signal Generator
Standard Signal Generator
(EQP) GR1021P2-P1
General Radio 1021-A standard signal generator. 250 - 920 MHz, 0.5 µV to 1 volt output at 50 ohms. 0 - 50% AM modulation. Operates on 115 or 230 vac, 50 / 60 Hz, 50 watts. Output via 874 connector. Line cord not included. 14-3/8"H x 20-1/4"W x 10-7/16"D.
$350 each
General Radio 583A
Audio Wattmeter
Audio Wattmeter
(EQP) GR-583A
General Radio 583A audio wattmeter. 5 mW full scale. 2.5 to 20,000 ohms impedance. In fair condition. First designed in 1933.
*** SOLD OUT ***
General Radio Filter for Unit Null Detector
(EQP) GR1212-P2
General Radio filter for unit null detector 1212-A. 1 Mc. 200v max input. Type 874. "GR" connectors and bround post on each end. Made in the USA. Circa 1963.
$125
General Radio Locking Air Variable Capacitor
40 - 150 pF
40 - 150 pF
(EQP) GR1607-P3
General Radio locking air variable capacitor. 40 - 150 pF. GR-874 connector. Made in the USA.
$125
General Radio Standard Air Capacitor
(EQP) GR1401-A
General Radio standard air capacitor. 100pf ±0.2%. 1,500v max peak.
$119 each
General Radio Variable Air Capacitor
(EQP) GR1602-P3
General Radio variable air capacitor. 15-75pf. For use with 1602-B admittance meter in 40-150 mHz ranged. 2.6"D x 5.4"L.
$125 each
Unit IF Amp
(EQP) GR-1216A
General Radio unit IF amp. Pairs with CNT detector. July 1961. The purpose of this unit is to serve as part of an RF null detector that rejects noise and interfering signals. It contains four IF amplifier stages tuned to 30 MHz. With the appropriate unit oscillator and mixer-rectifier it forms a sensitive heterodyne detector for VHF and UHF bridge measurements. Manual available on this page.
$295
General Radio Shielded Component Mount
(EQP) GR874ML
General Radio shielded component mount to GR-874 connector.
$95 each
General Radio 1218-A
Unit Oscillator
Unit Oscillator
(EQP) GR1218-A
General Radio 1218-A unit oscillator. 900 MHz to 2 GHz. Output: 110 mW to 160 mW into 50 ohm load. Requires 300 vdc @ 70 ma and 6.3 vac @ 1 amp. Power cable connector is removed. 12" x 7-5/8" x 7-1/2". NSN: 6625-00-674-3284. Sold as-is.
$95
General Radio 1654
Impedance Comparator
Impedance Comparator
(EQP) GR-1654/1782
General Radio 1654 impedance comparator with 1782 analog limit comparator. Indicates difference in magnitude and phase angle between two external impedances, usually a standard and an unknown. 1782 Analog Limit Comparator gives Go / NoGo indication when sorting parts for within tolerance values of resistance, capacitance and inductance. 12" x 19-1/2" x 15". NOTE: For parts only. Missing inter-connecting cables and fuseholder caps. No power cords. One knob missing cover. Sold as-is.
*** SOLD OUT ***
General Radio 1490-D
Decade Inductor
Decade Inductor
(EQP) GR1490-D
General Radio 1490-D Decade Inductor. 1 mH to 11.11 Henry in 1 mH steps. Tolerance less than 2%. One binding post insulator is cracked. 8-1/2" x 4-1/4" x 15-3/8". NSN: 6625-00-553-7655.
*** SOLD OUT ***
General Radio
107L Variable Inductor
107L Variable Inductor
(EQP) GR-107L
General Radio 107L variable inductor. 0.8 mH to 5.2 mH. 15 watts maximum power. 6-1/2" x 6-1/2" x 8-3/4"H.
$125
(EQP) GR-107J
General Radio 107M variable inductor. 7 µH to 54 µH. 15 watts maximum power. 6-1/2" x 6-1/2" x 8-3/4"H.
$125
General Radio 1558-A
Octave Band Noise Analyzer
Octave Band Noise Analyzer
(EQP) GR1558A
General Radio 1558-A octave band noise analyzer. 11 frequency bands from low to 75 Hz to 9600 - 19.2 KHz plus all pass. 44 to 150 dB input range. In fair condition. Battery accepts charge, unknown life. Service tag notes: "Will not calibrate". Sold as-is. No accessories available. 7-5/16" x 9-1/4" x 8-3/8".
$125
General Radio
Random Noise Generator
Random Noise Generator
(EQP) GR1390-B
General Radio 1390-B random noise generator. 3 ranges. Output from 0.1 mV to 1v. 105 - 125 / 210 - 250 vac power input. 50 - 400 Hz. 12-3/4" x 9-3/4" x 7-1/2"H. No line cord. Appears to work. NSN: 6625-00-799-8999.
*** SOLD OUT ***
(EQP) GR1390-B-RM
General Radio 1390-B random noise generator rack mount version of the above unit.
$95
General Radio 1234
SWR Meter
SWR Meter
(EQP) GR1234
General Radio 1234 SWR meter. Appears to work but crack in meter cover. One nut and spacer missing on handle. 115 or 220 vac, 50/60 Hz power required. No accessories supplied. 7-15/16" x 9-1/4" x 8-3/8".
-
SWR Ranges:
- 1 - 1.05
- 1 - 1.2
- 1 - 4
- 3.2 - 10
- 10 - 40
$250
General Radio
Decade Resistor
Decade Resistor
(EQP) GR1433-9723
General Radio decade resistor. 6 dials. 0.1 ohm steps. Maximum resistance = 11,111.1 ohms. 17.3" x 3.5" x 5" deep. Weighs 4.5 lbs. Brand new in the original box!!
*** SOLD OUT ***
General Radio Decade Resistance Unit Switch
(EQP) GR-510-P3
General Radio decade resistance unit switch. Black phenolic frame with knob and dial plate, "0 - 10". Found in Genrad 1433 Series decade resistor.
$125
General Radio Variable Inductor
0 - 55 mH
0 - 55 mH
(EQP) GR-107M
General Radio variable inductor. 0 - 55 mH. 15 watts max power. 40 ohms DCR. 0.60 amps. 6-1/2" x 6-1/2" x 8-3/4"H.
$149
General Radio
Sweep Frequency Reflectometer
Sweep Frequency Reflectometer
(EQP) GR1641
General Radio sweep frequency reflectometer. 20 -1500 MHz. Excellent condition.
$1,975
General Radio Type 980 Decade Capacitor Unit
(EQP) GR-980-M
General Radio Type 980 decade capacitor unit. Mica dielectric decades with silvered mica molded elements. 0.1µF max capacitance, ±% accuracy. 0.01 µF capacitance per step. 500v DC, 100 kc. *Used GR1419-K decade capacitor*
$75
General Radio
0 - 20 dB Potentiometer
0 - 20 dB Potentiometer
(EQP) GR1521-P1
General Radio 0 - 20 dB potentiometer for use with 1521-B Graphic Level Recorder. 5-1/2"W x 4-1/2"D x 2-3/4"H. 4 pin plug-in. NSN: 5905-448-5331. New, unused.
$35 each
General Radio
0 - 80 dB Potentiometer
0 - 80 dB Potentiometer
(EQP) GR1521-P3
General Radio 0 - 80 dB potentiometer module for Graphic Level Recorder. 4 pin plug-in. 5-1/2"W x 4-1/2"D x 2-3/4"H. New, unused.
$65 each
General Radio GR-1140A
UHF Wavemeter
UHF Wavemeter
(EQP) GR-1140A
General Radio GR-1140A UHF wavemeter. 250 MHz to 1200 MHz. Butterfly capacitor and inductor thru a IN22 diode to a 200 µA meter.
$120
General Radio 1450-TAR
Decade Attenuator
Decade Attenuator
(EQP) GR1450-TAR
General Radio 1450-TAR Decade Attenuator. 1 dB to 110 dB in 1 dB steps. 600 ohms, 1 watt maximum, ±1%, 0 - 1 MHz. 19" x 12-1/2" x 5-3/4".
$249
General Radio 1432-Q
Decade Resistor
Decade Resistor
(EQP) GR1432-Q
General Radio 1432-Q decade resistor. Four dials, 100 ohm steps. 100 - 1.111 Meg. 100k ohm range: 2.3 ma, 10k ohm range: 7 ma, 1k ohm range: 23 ma, 100 ohm range: 80 ma. Dimensions: 4-1/4" x 12-1/2" x 3-1/2".
$295 each
Trombone Setter
0 - 50 cm Constant Impedance
0 - 50 cm Constant Impedance
(RF) 011-001
Bishop Instruments trombone setter. 0 - 50 cm constant impedance. Alt. P/N: 933-8150. General Radio P/N: 874-LTL.
*** SOLD OUT ***
General Radio Standard Capacitor
0.001 µF ±0.25%
0.001 µF ±0.25%
(EQP) GR-509-F
General Radio standard capacitor. 0.001 µF ±0.25%. Banana plugs.
$107
General Radio 1652-A
Resistance Limit Bridge
Resistance Limit Bridge
(EQP) GR-1652-A
General Radio 1652-A Resistance Limit Bridge. 1 ohm to 1,111,111 ohms with internal standard. 1 ohm to 2 Meg ohm with external standard. Operates on 105 - 125 vac, 60 Hz, 30 watts. 19" x 8-3/4" x 12-1/4".
$295 each
General Radio
Inductance Standard
Inductance Standard
(EQP) WBM106M
General Radio inductance standard. Calibrated
to 1.1 Henry. 150ma max. 6" x 6" x 6-1/2".
$95
General Radio 874-VC
Variable Capacitor
Variable Capacitor
(EQP) GR-874-VC
General Radio 874-VC Variable Capacitor. 14 - 70 pF. In the original box.
$95
General Radio
Standard Inductors
Standard Inductors
(EQP) GR-1482-D
General Radio 1423-D Standard Inductor. 500 µH, 0.1%. Resonant frequency 960 KHz DC resistance, 0.38 ohm. 6-1/2" x 6-1/2" x 8".
$249
(EQP) GR-1482-E
General Radio 1482-E Standard Inductor. 1 mH, ± 0.1%. Resonant frequency 800 KHz. DC resistance 0.84 ohms. 6-1/2" x 6-1/2" x 8".
$249
Calibrated Susceptance
(RF) 874A
HP calibrated susceptance. "GR" connectors. 0.01 - 2.0 nH. 0 - 0.005 pF.
$95
General Radio Sound Level Calibrator
(EQP) GR-1552B
General Radio sound level calibrator. 2v @ 400C = 120 dB on 1551-B, = 110 dB on 1551-A. Made in the USA.
$95
General Radio Patch Cord
72 Ohm
72 Ohm
(EQP) GR-874-R33
General Radio patch cord. 72 ohm. 3 feet long. Banana plug termination and includes a GR874 connector.
$75
Standard Capacitor
500 pF
500 pF
(EQP) GR-505-E
General Radio standard capacitor. 500 pF (500 µµF).
$35 each
Standard Capacitor
0.001 µF
0.001 µF
(EQP) GR-505-F
General Radio standard capacitor. 0.001 µF.
$35 each
Standard Capacitor
0.01 µF
0.01 µF
(EQP) GR-505-L
General Radio standard capacitor. 0.01 µF.
$35 each
Crystal Diode Modulator
20 - 1000 Mc / 50 Ohms Input - Output
20 - 1000 Mc / 50 Ohms Input - Output
(EQP) GR-1000-P6
General Radio crystal diode modulator. 20 - 1000 Mc. 50 ohms input / output. Bias 4 volts max.
$75 each