AN/PRC-1177 Tactical Radio Set

NEW ELECTRONIC DESIGN
EFFICIENT ELECTRONIC CONVERSION TO
25 KHz SPACING - 1840 CHANNELS

� The worldwide increasing application of wireless communication technique necessitated an increasing of the operating channels available with the radio sets in use.

� Associated Industries has developed a very decisive modification to the PRC-77 resulting with the PRC-1177. Two advantages of the PRC-77 design for the basis of this modification are the rugged design and selective tuning via the variable tuning capacitors through which a high special purity of the transceiver can be gained.

� Associated Industries utilizes the 25 KHz sector arm modification that is installed in the front panel gearing mechanism. This type of modification allows the same type "user friendly" features of the PRC-77 which has a proven track record.

� The module A40 is replaced with the module A40/AS that contains a different switch on the A40-1 board and an additional two reference crystal oscillators (5.625 and 5.675 MHz). In the receiver path, the IF- Crystal filter with its + 16 KHz bandwidth is exchanged for a crystal filter with + 8.5 KHz bandwidth.>>>>>>>>>>>>>>>>>>>>>>>>

� In addition there is a slight modification to the A22 module creating the A22/AS which allows the decrease in nominal FM deviation to 6 KHz and the 150 Hz tone signaling is set to 2.0 Hz deviation.>>>>>>>>>>>>>>>>>

� The AN/PRC-1177 modification is a very simple and low priced solution permitting the adaptation of inventories to the more modern tactical requirements.