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Last modified 2026-09-12

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Royce 642 (RCB 10)

A picture of Royce 642 (RCB 10)

SPECIFICATIONS

GENERAL
Type:Citizen band transceiver
Frequency range:26.965-27.405 MHz
Channels / tuning steps:40
Mode:AM / SSB
Frequency control:PLL (CCI3001)
Frequency stability:?%
Clarifier or Delta tune:±? KHz
Power supply:Mains: 117 VAC (Fixed power cord)
or 13.8 VDC (2-pin jack on pigtail)
Current drain / power consumption:RX: 500 mA @ 13.8 VDC (Squelched)
TX: Max 2.2 A @ 13.8 VDC
Antenna impedance / connector:50 ohm / SO-239
Dimensions (W*H*D):357*138*270 mm (14.06*5.44*10.62")
Weight:7 Kg (15.43 lb)
Other features: Clock with alarm and timer. PA. ANL/NB. SWR-meter. Dimmer.




RECEIVER SECTION
Receiver system: Single conversion superheterodyne
9.78 MHz
Sensitivity: AM: 0.5 uV (10 dB S/N)
SSB: 0.2 uV (10 dB S/N)
Squelch sensitivity:0.5 uV (Threshold)
1 mV (Tight)
Selectivity:AM: 5 KHz (-6 dB)
SSB: 2.2 KHz (-6 dB)
Image rejection:
AF output power / speaker:3 W at ?% distortion / 8 ohm
External speaker connector:TS "Minijack" (3.5 mm)




TRANSMITTER SECTION
RF output power: AM: 4 W
SSB: 12 W (PEP)
Modulation system:
Max AM modulation (Factory set):More than 80%
Max FM deviation (Factory set):No FM
Spurious emissions:Better than -? dB
Microphone impedance / connector:500 ohm / 4-pin (Male GX16 locking ring jack)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 1978-1979 (Discontinued)
Main PCB: CBS-73001-A by ?
Sub PCBs:
Additional info: Also sold in Sweden as Colonel 5000, with 25 channels.
Related documents: PLL: CCI3001
Known markets and approvals: USA
FCC Data: RCB 10
Sams Photofact #:None
Modifications and fixes:
Reviews:
Options / Accessories:
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A rear picture of Royce 642 (RCB 10)