Radio Shack 20-521 owner manual Specifications

SPECIFICATIONS

Frequency Coverage: ..... 29–54 MHz (in 5 kHz steps)

108–136.975 MHz (in 12.5 kHz steps) 137–174 MHz (in 5 kHz steps)

406–512 MHz (in 12.5 kHz steps) 806.0000–823.9375 MHz (in 12.5 kHz steps) 851.0000–868.9875 MHz (in 12.5 kHz steps) 896.1125–956.0000 MHz (in 12.5 kHz steps)

Monitor Channels 5

Number of Banks 5

Sensitivity (AM/FM):

NFM: 20 dB S/N at 3 kHz deviation): 29–54 MHz 0.5 ∝V

137–174 MHz 0.4 ∝V

406–512 MHz 0.4 ∝V

806–956 MHz 0.6 ∝V

AM: 20 dB S/N at 60% modulation): 108–136.9875 MHz 1.5 ∝V

Spurious Rejection (at 40.84 MHz) 50 dB

Selectivity:

10 kHz –6 dB

15 kHz –50 dB

IF Rejection (at 162.4 MHz) 80 dB

Channels	150
Operating Temperature ....	–4 to 140°F (–20 to 60°C)
Scan Speed	50 Channels/Second
Search Speed:
Normal	100 Steps/Second
Hypersearch	300 Steps/Second
Service	50 Frequencies/Second
Priority Sampling	2 Seconds
Delay Time	2 Seconds
IF Frequencies 380.7 MHz, 10.85 MHz, and 450 kHz
Antenna Impedance 50 Ohms
Audio Output	350 mW maximum
Built-in Speaker	17/16 Inches (36 mm) 8 Ohm,
	Dynamic Type
Maximum Current Drain	180 mA

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