RA-6830JD LF-MF-HF communications receiver. Half-rack width successor to the famous RA6790 with an improved synthesizer. LED frequency/mode and meter displays. Covers 100 khz - 30 Mhz continuously; modes AM, FM, CW, LSB, USB; selectable bandwidths 0.3, 1.0, 3.2, 6.0, 20 khz. 3 selectable AGC settings plus variable IF gain setting. Meter display selectable between RF and audio level. All frequency and mode selection done from the front panel keyboard; fine tuning by main tuning dial. Rear panel has BNC jacks for RF in, IF out, and 1st LO in; one 3-prong 125/250 VAC 60 Hz power connector; one male and one female DB-25 connector. The J12 female connector supplies internal connections; pin 18 is 2W audio output, pins 7, 8, and 9 are ground, others unknown. 8 1/2" x 5 1/4" x 22".