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	Cambridge Kits TRANSMITTING Antenna Noise Bridge, Two Tone Oscillator, Speech Compressor MSF 60 kHz MSF Clock, 60 kHz Receiver, Retuning 17 - 136 kHz RECEIVING Antenna Tuner, Tunable Audio Notch Filter, VLF Receiver, LF Converter, 198 kHz Converter, 50 & 70 MHz Converter, Crystal Calibrator AUDIO Audio Oscillator, Sound Meter, Chime
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