Accession Number : AD0277112

Title :   LOW LEVEL TRANSMITTER-EXCITER

Descriptive Note : Final rept.

Corporate Author : TEMCO ELECTRONICS DIV TEMCO ELECTRONICS AND MISSILES CO DALLAS TEX

Report Date : OCT 1961

Pagination or Media Count : 1

Abstract : The development is presented of 8-watt, amplitude-modulated, single-channel radio-telephone transmitters capable of operation in the VHF and UHF ranges. The single channel crystal-controlled transmitter can be set to any desired frequency in the range of 118 to 152 mc (TV-24) and 225 to 400 mc (TU-5). The transmitters may be operated either as a low-powered transmitter or as exciters capable of driving a high-powered linear amplifier. The transmitter circuitry involves specialized packaging of conventional transmitter components, an audio-modulator, a directional coupler, and a low-pass filter. The transmitters are designed for the attainment of high operational stability, long operating life, ease of maintenance and reduced cross-modulation. The transmitter-exciters exhibit VHF stability. Frequency stability for the TV-24 is .00015% and the TU-5 stability is .00013%. Two major development goals were achieved: (1) the reduction of cross-modulation products by use of low-level modulation and linear amplification, and (2) the development of compact accessible assemblies which take advantage of the latest advances in the state-of-the-art. The complete unit occupies only 3 1/2 inches of vertical panel height and requires no forced air cooling. (Author)

Descriptors :   *CRYSTAL OSCILLATORS, *RADIO TRANSMITTERS, *RADIOTELEPHONES, AMPLITUDE MODULATION, AUDIO FREQUENCY, COUPLING CIRCUITS, LOW PASS FILTERS, MODULATION, MODULATORS, OPERATION, POWER AMPLIFIERS, POWER SUPPLIES, RADIO INTERFERENCE, RADIOFREQUENCY OSCILLATORS, REDUCTION, ULTRAHIGH FREQUENCY, VERY HIGH FREQUENCY

Distribution Statement : APPROVED FOR PUBLIC RELEASE