Cryptologic Collection Equipments
1977 edition - NAVEDTRA 10251

Contains explanation of features and operation for equipment used by Naval Security Group. Particular pieces of equipment listed below  are typically covered with a photo, brief description, and operating instructions. 

0. Index - download 0.6 MB pdf

1. Introduction to Cryptologic Equipments - pages 0-13 - download 4 MB pdf

2. Transmission Lines, Multicoupling Devices, and Antennas - pages 14-28 - download 4 MB pdf

3. Introduction to ReceiversR-390A/URR (27500 bytes) - pages 29-71 - download 10 MB pdf

4. Demodulators, Rekeyers, and Demultiplexers  - pages 72-110 - download 9 MB pdf

5. Teletypewriters  - pages 111-137  - download 6 MB pdf

6. Magnetic Tape Recorders  - pages 138-175 - download 10 MB pdf

7. Signal Analysis EquipmentRD-112A/U (329666 bytes)  - pages 176-205  - download 7 MB pdf

8. Special Purpose Equipment  - pages 206-217 - download 4 MB pdf