Radio Shack 20-163 manual DB +/-4 kHz

216.0025–224.975MHz.	.......................................................................		0.5 uV
225-299.975 MHz			0.5 uV
300-405.975 MHz			0.8 uV
406–512 MHz			0.5 uV
764–960 MHz			0.7 uV
1240–1300 MHz			0.7 uV
AM:
25–54 MHz			1 uV
108–136.99166 MHz			1 uV
137–174 MHz			1.5 uV
216.0025–224.975MHz.	.......................................................................		1.5 uV
225-299.975 MHz			2 uV
300-405.975 MHz			3 uV
406–512 MHz			2 uV
764–960 MHz			2 uV
1240–1300 MHz			3 uV
Selectivity:
All AM and FM (except AM 25 – 27.995 MHz)			.....................6 dB +/-8 kHz
...........................................................................................			-50 dB +/-17 kHz
AM 25 – 27.995 MHz			-6 dB +/-4 kHz
.............................................................................................			-50 dB +/-6 kHz
Spurious Rejection (at 154.1 MHz FM)			40 dB
Scanning Rate		Up to 60 Channels per Second
Search Rate		Up to 78 Steps per Second
Delay Time			2 seconds
Intermediate Frequencies (IF):
1st			380.8 MHz
2nd			21.4 MHz
3rd			455 kHz
Priority Sampling			2 seconds
Operating Temperature			-14 to 140° F(-20 to 60° C)
IF Rejection
380.8 MHz at 154.1 MHz			60 dB
21.4 MHz at 154.1 MHz			100 dB
Squelch Sensitivity:
Threshold (FM and AM)			0.5 uV
Tight (FM)			25 dB
Tight (AM)			20 dB
Antenna Impedance			50 Ohms
Audio Output Power (10% THD)			1.5W
Built-in Speaker	3 Inches (77 mm)(8-ohm, Dynamic Type)
Power Requirements			13.8V
Current Drain (Squelched)			200 mA
Dimensions (HWD)	2 1/4 x 7 1/4 x 5 5/16 Inches (55 x 185 x 135 mm)
Weight (without antenna)			27.7 oz. (790 g)

Specifications and depictions are subject to change and improvement without notice. Actual product may vary from the images found in this document.

59