FOUR-CHANNEL AMPLIFIER ASSEMBLY.
Final rept., Feb-Dec 62.
AIRCRAFT ARMAMENTS INC COCKEYSVILLE MD
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The result of the work was delivery of five prototype units of a high-reliability four-channel trnsistorized audio amplifier assembly. Each assembly houses four independent amplifier modules with a frequency response from 300 to 3000 cycles per second and a gain of 88 db. The assembly also contains two redundant power supplies in the 7 high standard relay panel. The amplifiers met all the requirements of the specification. The two most difficult problems consisted of maintaining the regulated output AGC attack and recovery time for input signal level changes over the temperature range, and designing the dynamic response circuit. The dynamic response feature which essentially restricted the amplifier bandwidth under zero input signal conditions was to be included if proved feasible and at the same time did not affect the other characteristics of the amplifier. It was proved unfeasible after extensive tests were performed, and it was proved to have a strong interaction with the AGC action. It was therefore not included in the amplifier design. Author