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Last modified 2026-08-08

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RadioShack 21-1840

A picture of RadioShack 21-1840

SPECIFICATIONS

GENERAL
Type:License-free FRS transceiver
Frequency range:462.5625-467.7125 MHz
Channels / tuning steps:14
Frequency stability:? ppm
Mode:NFM
Memory channels / management:-
Repeater shift / offset:Simplex only
Power supply:3.6-4.5 VDC (Three R6 / AA alkaline or rechargeable batteries)
Current drain / power consumption:RX: ? mA
TX: ? mA
Antenna impedance / connector:50 ohm / Non-removable foldable antenna
Dimensions (W*H*D):100*65*30 mm (3.94*2.56*1.19")
Weight:? g (? oz)
Other features:CTCSS/PL "Quiet codes".




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: ? MHz
2nd IF: ? KHz
Sensitivity:
Squelch sensitivity:
Selectivity:
Image rejection:
AF output power / speaker:? mW at ?% distortion / Headset operation only
External speaker connector:




TRANSMITTER SECTION
RF output power:200 mW (ERP)
Modulation system:
Max FM deviation (Factory set):±2.5 KHz
Spurious emissions:Better than -? dB
Microphone impedance / connector:? ohm / ?
Microphone input level:? mV




MISCELLANEOUS
Manufactured:1999-200x (Discontinued)
Additional info: New price 2000 in the US: $69.99
New price 2001 in the US: $49.99
Related documents:
Modifications and fixes:
Reviews:
Options / Accessories:
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