Marine radio receiver NRD-72 From 1978 to 1982 built JRC (Japan Radio Co. Ltd., Tokyo) this recipient. It covers the range between 100 kHz and 30 MHz in the modes A1, A2, A3, and SSB (USB) from, for Sitor mode (F1) is supplied as an accessory adapter. The frequency is in the great line of LEDs in the upper central part of the unit to 100 Hz display accurately. Voting for the full MHz with large wheel on the left set, less than 1 MHz by "up / down tuning" with the same size wheel in the center of the device. It can be selected tuning steps between 1 kHz and 100 Hz. The frequency can be locked once adjusted by pressing the "Lock" to prevent accidental turn. For A1, 500 Hz and 3 kHz as available bandwidth, A3 kHz for 3 and 6. 2182 kHz is invoked by pressing a button, the AGC is turned off, a BFO (+ / - 2.5 kHz) is present. The intermediate frequencies of 2 x-Spuers are 70.455 MHz and 455 kHz). The NRD-72 is running on AC voltages between 110 and 100 V and at 24V. A loudspeaker is not installed in sockets for an external speaker and headphones, are located on the front page.
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Great even after 30 years, I bought used and it works nice, 100 kHz to 30000 kHz full coverage, nice selectivity, good tuning steps and performance. Great Rig. JRC NRD 72 - made on April 1982 (previously wrote design approval date Aug. 1979) more pics at http://goo.gl/ZS06I