Test of RCA Victor General Purpose Receiver
Abstract
The usable sensitivity of this receiver is very good, the input required for standard output of 5 milliwatts averaging 8.7 microvolts varying from 4.3 to 21 microvolts, for CW signals. For MCW signals, the input required for standard output averages 18 microvolts, varying from 11.3 to 30 microvolts. These measurements are based on a noise output of .0125 milliwatts. The collectivity is very good except for the lack of collectivity over a band of 38 kilocycles between the resonant signal and image response. On the side away from the image response, the slope of the curve is very sharp, showing an attenuation of 60 DB's on a voltage basis at 1.8 percent of resonance at the lowest frequency, and an attenuation of 60 DB's at 0.1 percent in the highest frequency band, The same attenuation, however, on the other side of resonance, due to the intervening poor selectivity band between resonance and image response, is at 3.7 percent for the lower frequency, and 0.3 percent for the higher frequency. Resonant overload curves show that the receiver will handle outputs satisfactorily up to 400 milliwatts. There is considerable interaction between receiver from the first oscillator frequency, but only slight interaction from its harmonics. With the single tuning control and band change switch, tuning and frequency shift are facilitated. The noise level is readily controlled and stable operation is obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 14, 1933
- Accession Number
- AD1145254
Entities
People
- S. A. Greenleaf
Organizations
- United States Naval Research Laboratory