Drake Theta 550
Communications Terminal


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Drake Theta 550

The Drake Theta 550 communications terminal is a receive-only decoder designed to demodulate and display Morse Code (CW), Baudot RTTY and ASCII. Additionally there is an iambic paddle input and built-in Morse keyer. Automatic speed tracking for CW from 5 to 50 words is supported. Nine Baudot and ASCII speeds include:  45.5, 50, 57, 75, 100, 110, 150, 200 and 300 baud. Input is audio or TTL. Output is to composite 75 ohm video, parallel ASCII printer port or opto-isolated keyer output. Requires 12 VDC at 800 mA.

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