| Directory of Electronics Test Equipment (Electronics Supply Office) | NAVSHIPS 94200.4 | 1963* | 1-2 page spec sheets on test equipment - several thousand pages - download | 
| Electronic Test Equipment Application Guide | NAVSHIPS 91727 NAVSHIPS 91727A | 1952* 1961 | 1-2 page spec sheets on test equipment + selection guide by category (wattmeter, signal generator, etc.) - download 32 MB pdf | 
| Military Standardization Handbook Vol. 1, Electronic Test Equipment. | MIL-HDBK-172A TM 11-487-1/1 | 1965 | download here | 
| LAJ audio oscillator |  |  | -- | 
| LAJ-1 audio oscillator |  | -- | -- | 
| LAJ-3 audio oscillator |  |  | -- | 
| LAJ-4 audio oscillator |  |  |  | 
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| LAK signal generator |  |  |  | 
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| LM-7 Frequency Meter |  |  |  | 
| LM-13 Frequency Meter |  | -- | -- | 
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| LP-5 Frequency Meter |  |  | -- | 
| LQ-3 Audio Oscillator | -- | -- | -- | 
| LR-1 Heterodyne Frequency Meter
 
 |  | Made by General Radio. Used aboard ship and at shore radio stations to check frequency of transmitters and receivers. | Aboard USS North Carolina BB-55 | 
| LX-1 UHF Signal Generator | |||
| LX-2 UHF Signal Generator |  |  |  | 
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| OAE Receiver Analyzer Equipment (Tube Tester) |   |  |   
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| OAN (CFT-60054-A) Test Oscillator | 200kc-2mc with 66082 whip antenna used to test MF direction finders  |  |  | 
| OAP Radar Wavemeter - Oscillator |  | Schematic - thanks to Elden Meyer |  | 
| OBL-3 Oscilloscope |  |  |  | 
| OBN Transmitting Monitor Scope |  |  | |
| OBQ-1 VTVM | |||
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| OBQ-3 VTVM |  |  |  | 
| OCR-1 Voltmeter | -- | -- | -- | 
| OCV Field Intensity Meter | 100-400 Mc Stoddart NM-3, NM-3A |   |  | 
| OE-9 Receiver Analyzing Equipment |  |  |  | 
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| OE-12 Receiver Analyzing Equipment |  | -- | -- | 
| OE-13 Receiver Analyzing Equipment | |||
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| OF-2 RFI Meter | -- | ||
| OH RF Bridge | For measuring RF Resistance (0.1 to 311.1 ohms) and RF capacitance (50 mmf to 1.8 mfd) within frequency limits of 25kc and 5mc | General Radio 516 http://www.w1tag.com/GR516.htm | -- | 
| OJ-3 AF Impedance Bridge | -- | -- | |
| OQ-1 tube tester |  |  |   Weston model 788 Manual for OQ-2 - download 7.2MB pdf | 
| OQ-3 Tube Tester |   |  |  | 
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|  |  | Weston model 788 Manual for OQ-2 - download 7.2MB pdf | -- | 
| CLB-60007 RLC bridge | Manuf Clough-Brengle | - | - | 
| CV-22195 Power Level / Voltmeter |  |  | -- | 
| CZY-10223 Tool Kit |  |  |  |