GRT-22

GRT-22 UHF Radio Transmitter Set - A single channel UHF Radio Transmitter set built by mmmmm. From T.O. 31R2-2GRT-102: Transmitting Set, Radio AN/GRT-22(V) is comprised of Transmitter Radio T-1109(V)/GRT-22, referred to as the UHF exciter, and Amplifier, Radio Frequency AM-6155/GRT-22, referred to as the UHF power amplifier. When only 10 watts is required only the exciter is necessary. An oscillator-synthesizer module is available which is directly interchangeable with and replaces the crystal oscillator module The UHF exciter, utilizing the oscillator-synthesizer is capable of transmission on any one of 7000 channels spaced 25 khz between 225.00 and 399.975 mhz. The UHF exciter is a crystal-controlled self-contained solid-state assembly that operates in the amplitude modulation (AM) mode. It is capable of transmission on any one of 3500 channels spaced 50 khz between 225.00 mhz and 399.95 mhz as determined by the operating frequency of the crystal used. The power amplifier is a self-contained unit which amplifies the 1O-watt exciter output to 50 watts. The power amplifier utilizes a 350 watt plate dissipation beam power tetrode vacuum tube in a tuned cavity configuration. The amplifier operates Class AB linear. The 50-watt output is maintained by means of a closed loop automatic power control action which is coupled back into the exciter. GRT-22 Radio Transmitter GRT-22 Radio Transmitter Element Value Notes Nomenclature GRT-22 Origins Variants Manufacturer mmmmm Type Single Channel Ground to Air Radio Receiver Number Made IEEE Band UHF Frequency 225-399.975 Number of Channels 3500 or 7,000 Channel Spacing 50 or 25 Khz Exciter Primary Power 105, 120, 210 and 240 volts ± 10%, single phase 47 hz to 420 hz, 140 watts max || Amplifier Primary Power 05, 120, 210, and 240 volts ± 10%, single phase 47 hz to 420 hz 610 watts max Technology Solid State (Transistor)/UHF power amplifier are single-stage tetrode vacuum tube amplifiers MTBF MTTR GRT-22 Components (edit list) Component Model Quantity Height Width Deep Weight Notes UHF Exciter T-1109(V) 1 5-1/4 in 17-3/4 in 16-7/8 in 43 pounds UHF Power Amplifier AM-6155 1 7 in 17-3/4 in 18-1/2 in 70 pounds See Also: US Radio Sets Sources: Winkler, David F., Searching the Skies: the Legacy of the United States Cold War Defense Radar Program, USAF Hq Air Combat Command, 1997, 192 pages, Pdf MIL-HDBK-162A, 15 Dec 1965. TO 31R2-2GRT-102 RADIO TRANSMITTER T-1108(V)/GRT-21(V) & T-1109(V)/GRT-22(V) AND RADIO FREQUENCY AMPLIFIER AM-6154/GRT-21(V) & AM-6155/GRT-22(V) (AN/GRT-21 AND AN/GRT-22) Pdf Links: