KG-13

The KG-13 was the first transistorized cryptographic machine developed by NSA in the early 60's. It used the newly developed 2N404 germanium transistor instead of vacuum tubes. It consisted of a KG-3 transmitter a KG-12 receiver. The transmitter used about 500 transistors and the receiver about 300. The transmitter was switchable to function as a receiver. [ [http://www.jproc.ca/crypto/kg13.html KG-13 (PONTUS)] ]

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