MAST BRACKET f5b-A Figure 4. Electrical Equipment Shelter S-56A/G, front oblique view. mounting bracket. Two Mast Brackets MP- 50-A, which support the receiving antennas, are secured to the front wall of the shelter. Mast Base Bracket MT-657/GRC, which sup- ports the transmitting antenna, is secured to the rear wall of the shelter. 8. Description of Radio Modulator MD—239A/ GR : a. The fsk-modulator provides the required earrier frequency shift for radio transmission of teletypewriter signals. The fsk-modulator is bolted to the top of the transmitter (fig. 2). b. The fsk-modulator chassis is contained in a smooth, gray enameled metal case. Operating controls are located on the front panel. c. A power input jack, a blower jack, and a teletypewriter input jack are mounted on the rear of the chassis.
DesignationTM 11-264B
EditionJan 1957
StatusSuperseded
Pages124
FunctionComms Signal
CollectionHistoric
Public domain (U.S. Government work)