General Radio Corp. Collectors Area

An old photo of my GR collection.
The GR end of my current workbench.
A shelf of GR resistance boxes and some meters.

My main interest is in bridges, standards and impedance measurements. Here are some descriptions of my adventures with various pieces of GR equipment. Some are more detailed and have more photos than others but I'll try to spruce them all up as time goes by.

•  650-A CRL Bridge
•  572-B Microphone Hummer
•  1564-A Sound and Vibration Analyzer
•  1559-B Microphone Reciprocity Calibrator
•  667-A Inductance Bridge
•  716-C Capacitance Bridge
•  716-P4 Guard Circuit
•  1603-A Z-Y Bridge
•  1605-A Impedance Comparator
•  1608-A CGRL Impedance Bridge
•  1611-A Capacitance Bridge (eye tube)
•  1615-A Capacitance Bridge
•  1632-A Inductance Bridge
•  1650-A & B Impedance Bridge
•  1232-A Tuned Amplifier &Detector
•  1304-B Beat Frequency Audio Oscillator
•  1346 Microvolter
•  1493-A Precision Decade Transformer
•  1396-A Tone-Burst Generator
•  Restoration Tips
•  H.P. Hall index of GR instruments in the GR Experimenter with additions from Alan Douglas

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