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The worldwide increasing application of wireless
communication technique necessitated an increase of
the operating channels available with the radio sets
in use.
Associated Industries has developed a very decisive
modification to the PRC-77 resulting in 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 of "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.
The AN/PRC-1177 modification is a very simple and
low priced solution permitting inventories which can
be adapted to the more modern tactical requirements.
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