Test of Collins Type 18M-5 Radio Equipment (Receiver Portion) Navy Model TCH Equipment Collins Radio Company, Cedar Rapids, Iowa Contractor
Abstract
The Collins 18M-5 equipment was set up in the Laboratory and the receiver portion given a general inspection of the mechanical construction and wiring. The electrical tests conducted to determine compliance with reference (b) were as follows: (a) Accuracy of main tuning dial calibration and band overlap. (b) CW and MCW sensitivity end mcw signal/noise ratio. (c) Overall selectivity. (d) Preselection selectivity. (e) Image selectivity.(f) Intermediate frequency rejection. (g) Radiation of first oscillator to antenna post. (h) Maximum undistorted output. (i) Resonant overload for CW reception.(j) overall fidelity. (k) Frequency and gain stability under the following conditions: (1) Supply voltage variation (2) Changes in ambient temperature (3) Changes in relative humidity (4) Variation of gain control (5) Variation of input signal (6) Reset of band switch (7) Reset of oscillator control switch (1) Output hun level. (m) Regeneration and instability (n) Oscillator operation (o) Effect of sharp pulses on output (p) Damage and deterioration of equipment at 50 deg C ambient temperature. (q) Spurious oscillations (r) Effect on receiver of very strong fields (s) Cross modulation and spurious responses in very strong fields (t) Range and linearity of volume control (u) Operation of receiver with replacement tubes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 1941
- Accession Number
- AD1162549
Entities
People
- F. C. Isely
Organizations
- United States Naval Research Laboratory