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+ | ====== E-662 ====== | ||
+ | **Civil protection system receiver E-662**; developed and produced by [[Brown Boveri|Brown Boveri Cie.]] | ||
+ | The civil protection organization planned a communications system to inform the population in the shelters in the event of a disaster and also to ensure communication between local civil protection organizations, | ||
+ | |||
+ | ===== Technical Data ===== | ||
+ | {{: | ||
+ | * [[Principle]]: | ||
+ | * [[Modes]]: [[F3|FM (F3)]] | ||
+ | * [[Frequency range]]: 439 - 440 MHz | ||
+ | * [[Sensitivity]]: | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Accumulator / Batteries]]: | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | * As standard antenna, a rubber coated antenna is used. To operate the set in an underground shelter, an external antenna (in the escape tunnel of the shelter) can be connected via a coaxial connector. | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | ===== Operation ===== | ||
+ | The local communications radio receiver has only two buttons, a volume and a test button. | ||
+ | |||
+ | It is powered by batteries, which means that the receiver, which is only switched on when messages are sent, can be operated for approx. 8 weeks from one set of batteries; when connected to a car battery, the receiver works for months. | ||
+ | |||
+ | ===== Technical Principle ===== | ||
+ | Single conversion superhet with a quartz-controlled fixed frequency and tone-controlled selective call operation. | ||
+ | |||
+ | ==== Semiconductor setup ==== | ||
+ | The set is completely solid state. | ||
+ | |||
+ | ==== Development ==== | ||
+ | The civil protection local communications broadcasting system [[Ortsfunksystem 90]] was developed by [[Brown Boveri]], in the eighties. The system consists of fixed frequency selective call activated receivers controlled from local communications transmitters, | ||
+ | |||
+ | ==== Field use ==== | ||
+ | |||
+ | {{gallery>: | ||
+ | ===== Manuals ===== | ||
+ | |||
+ | ==== Additional information ==== | ||
+ | * [[https:// |
en/e-662.txt · Zuletzt geändert: 2019/04/15 08:32 von 127.0.0.1