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Last modified 2020-07-31

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President Adams

A picture of President Adams

SPECIFICATIONS

GENERAL
Type:Citizen band transceiver
Frequency range:26.965-27.405 MHz
Channels/tuning steps:40
Mode:AM/SSB
Frequency control:PLL (uPD858C)
Frequency stability:0.001%
Power supply:11.7-15.9 VDC (3-pin connector)
Current drain/power consumption:RX: Max 2 A
TX: Max 3 A
Antenna impedance/connector:50 ohm / SO-239
Dimensions (W*H*D):232*65*275 mm (9.13*2.56*10.8")
Weight:3.55 Kg (7.83 lb)
Other features:PA. ANL/NB. RF & Mic gain. SWR-meter. Tone. Dimmer. Scanning.




RECEIVER SECTION
Receiver system:Single conversion superheterodyne
IF: 7.8 MHz
Sensitivity:AM: 0.75 uV (10 dB (S+N)/N)
SSB: 0.25 uV (10 dB (S+N)/N)
Selectivity:4.2 KHz (-6 dB), 7 KHz (-60 dB)
Image rejection:70 dB
AF output power/speaker:3 W at 10% distortion / 8 ohm
External speaker connector:3.5 mm, 8 ohm




TRANSMITTER SECTION
RF output power: AM: 4 W
SSB: 12 W (PEP)
Modulation system: AM: High and low level, class B
SSB: Balanced
Max FM deviation:No FM
Spurious emissions:Less than -? dB
Microphone impedance/connector:? ohm / 4-pin (Metal screw ring connector)
Microphone input sensitivity:? mV




MISCELLANEOUS
Manufactured:Taiwan, 1978-1979 (Discontinued)
Main PCB:PC-346AA By Uniden
Additional info:One of the largest solid state mobile CB's I've ever seen.
Related documents: User manual (3.3 MB)
Schematic (1.8 MB)
BOM (361 KB)
Modifications:
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