Icom IC-505 Operation Manual page 4

SECTION Il FEATURES
. Versatility
The IC-505 accepts either standard dry cell pack or optional rechargeable
nickel-cadmium battery pack, IC-BP10, as well as external 13.8V DC power
supply. Output power can be selected between 10W for fixed use and 3W for
portable use, increasing its versatility.
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. Highest receiver performance
RF amplifier dual-gate MOS FET (8SK74)—featuring ultra high gain and low
noise—with PLL-circuit control voltage added to band-pass filter provide
theoretically flat and. optimum sensitivity. Moreover, high-performance
crystal filter at IF stage assures ideal pass-band characteristics.
Distortion-free radio transmitter
The advanced circuit configurations including exclusive purpose IC's in the
balanced modulator circuit, double-balanced mixer in transmission mixer
~ circuit, and a number of quality-assured band-pass filters and low-pass filters
generate a pure signal with minimum spurious.
Microprocessor frequency control functions
The Dual VFO system and 1 MHz UP function have been developed utilizing
highly advanced computer and PLL technology. The ІС-505 features 6-
channel memories which can be used independent of emission modes,
unique CALL channel, Memory Scan which sequentially searches memory
channels, Program Scan which searches only specified frequency band, and
other useful frequency control functions.
New liquid-crystal display panel provides clear visibility in sunlight. At
night, simply turn on the switch for illumination
Helpful accessory circuits provide quick action
Standard accessory circuits such as a split switch for split frequency QSO,
noise blanker circuit which eliminates pulse noise, squelch circuit which
functions even in SSB CW modes, dial-lock switch, and CW break-in circuit
make the IC-505 the finest set for the amateur radio operator.