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Last modified 2021-06-06

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President Lincoln

A picture of President Lincoln

SPECIFICATIONS

GENERAL
Type:Citizen band / "Freeband" / Export transceiver
Frequency range: 26-30 MHz
Originally marketed as a 10 m ham transceiver, but expanding
the frequency range is a simple task, and the standard 40 channel
CB bandplan is already encoded in the CPU from factory.
Channels/tuning steps:100 Hz, 1 / 10 KHz
Mode:AM / FM / SSB / CW
Frequency control:PLL
Frequency stability:Max ? ppm
Power supply:13.2 VDC (2-pin connector)
Current drain/power consumption:RX: Max 1 A
TX: Max 4.5 A
Antenna impedance/connector:50 ohm / SO-239
Dimensions (W*H*D):185*60*250 mm (7.28*2.36*9.84")
Weight:2 Kg (4.41 lb)
Other features:PA. SWR-meter. NB. RIT. Dimmer. Local/DX button. Scanning.




RECEIVER SECTION
Receiver system: Single conversion superheterodyne (AM/SSB/CW)
IF: 10.695 MHz
Double conversion superheterodyne (FM)
1st IF: 10.695 MHz
2nd IF: 455 KHz
Sensitivity: AM: 0.5 uV (10 dB S/N)
FM: 0.5 uV (20 dB S/N)
SSB/CW: 0.25 uV (10 dB S/N)
Selectivity:70 dB (Adjacent channel)
Image rejection:65 dB
AF output power/speaker:2.5 W at 10% distortion / 8 ohm
External speaker connector:9-pin Molex accessory jack, 8 ohm




TRANSMITTER SECTION
RF output power: AM/FM/CW: 10 W
SSB: 21 W (PEP)
Modulation system:
FM deviation:? KHz
Spurious emissions:Less than -? dB
Microphone impedance/connector:? ohm / 5-pin (Metal locking ring connector)
Microphone input level:1 mV (No reference)




MISCELLANEOUS
Manufactured:Philippines (Early), 198x-199x (Discontinued)
China (Later), 199x-2004 (Discontinued)
Main PCB: Early: PB-111AA, AB, AC, AD and AE by Uniden
Later: PB-333AA by Uniden
Sub PCBs: Early:
Presently unknown to me
Later:
PB-112AE - LCD display and driver board
PB-117AD - NB board
PB-121AD - PLL and CPU board
PB-293AA - RF final board
PB-298AA - Shorting bar board
PB-299AA - SWR board
PB-303AA - FM demodulator board
PB-312AA - Volume and squelch pots board
? - Mode selector board
? - RIT & RF power pots board
? - Channel selector board
? - Pushbutton board
? - Mic jack board
Additional info: The Lincoln was intended for the european market and is similar to the Uniden
branded HR-2830 for the US market.
Related documents: User manual (449 KB)
PLL #1: SM5152A
PLL #2: PLL0305A
FM-IF: IR3N06
Sams Photofact #:None
Modifications and fixes: Frequency expansion (125 KB)

There was also the "Chipswitch", which added many enhanced features such as: Even further
extended frequency range, 30 memory channels, repeater offset, split operation and more. This
modification consisted of a CPU replacement. In 2008, the chip was available for around $50.
Reviews:
Options/accessories:
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A rear picture of President Lincoln