The R. L. Drake model DSR-1 receiver is a commercial grade communications receiver employing the most up to date solid state devices and circuitry offering continuous coverage from 10 kHz to 30 MHz. The received frequency is indicated by six NIXIE tubes to 100 Hz. All frequency injections of the DSR-1 are controlled by a phase locked digital synthesizer which allows incremental frequency selection in 10, 1, and 0.1 MHz steps. The remaining 0 to 0.1 MHz is continuously adjustable by a highly stable variable oscillator from the fine tuning knob on the front panel. Modular construction on easily accessible printed circuit boards is used throughout the DSR-1. The large use of dual gate MOS-FET transistors in the DSR-1 circuitry contributes to its superior intermodulation, AVC, wide dynamic range and overload performance. The front panel controls allow the operator to Select frequency, AM or SSB product detector, I . F. bandwidth, AF gain, BF0 pitch, fast or slow AVC, manual RF gain and the highly effective Drake series gate noise blanker. ISB (Independent Sideband) is a built-in feature of the DSR-1. Separate I.F. crystal filter, I.F. amplifier, and audio output circuits allow two simultaneous communication channels to be employed on one frequency assignment, doubling the information receiving capacity.
Consideration in the design of the DSR-1 has been given to special customer requirements. Accessories and space have been reserved in the DSR-1 so that performance and operating modes to fill special customer needs can be accommodated. The R. L. Drake DSR-1 receiver is among the lowest cost commercial grade digital synthesized receivers available today up-holding the R. L. Drake Company’s philosophy, "More Performance and Lower Cost Through Engineering."