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Last modified 2022-02-11

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President Madison (Version 2)

A picture of President Madison (Version 2)


Type:Citizen band transceiver
Frequency range:26.965-27.405 MHz
Channels / tuning steps:40
Mode:AM / SSB
Frequency control:PLL (uPD858 or MB8719)
Frequency stability:0.001% @ -20 to +50C (-4 to +122F)
Clarifier or Delta tune:? KHz
Power supply:Mains: 117 VAC (Fixed power cable)
or 13.8 VDC
Current drain / power consumption:RX: 1 A @ 13.8 VDC (Squelched) or 45 W @ mains (Squelched)
TX: Max 3 A @ 13.8 VDC or 100 W @ mains
Antenna impedance / connector:52 ohm / SO-239
Dimensions (W*H*D):Transceiver: 378*119*287 mm (14.88*4.69*11.31")
Speaker: 146*119*287 mm (5.75*4.69*11.31")
Weight:Transceiver: 6.58 Kg (14.5 lb)
Speaker: 1.59 Kg (3.5 lb)
Other features: PA. ANL/NB. SWR-meter. Channel 9 button. AWI.
Rotary alarm clock with sleep timer.

Receiver system: Single conversion superheterodyne
IF: 7.8 MHz (SSB) - 455 KHz (AM)
Sensitivity: AM: 0.5 uV (10 dB S+N/N)
SSB: 0.25 uV (10 dB S+N/N)
Selectivity:AM/SSB: 2.2 KHz (-6 dB)
7.5 KHz (-60 dB)
Image rejection:60 dB
AF output power / speaker:3 W at 10% distortion / External only
External speaker connector:Two 3.5 mm, 8 ohm

RF output power: AM: 4 W
SSB: 12 W (PEP)
Modulation system:
FM deviation (Factory set):No FM
Spurious emissions:Better than -? dB
Microphone impedance / connector:? ohm / 5-pin (Metal locking ring connector)
Microphone input level:? mV

Manufactured:Taiwan, 197x-197x (Discontinued)
Main PCB:PC-??? by Uniden
Sub PCBs: PC-006EB - PSU board
and others...
Additional info: Changes from version 1 include the channel 9 button with its corresponding
LED, the PA function moved to the squelch knob, ANL, AWI, a 5-pin mike
connector and electronic RX/TX switching. The MB8719 PLL was also new
for this version.
Related documents:User manual Low resolution (2.9 MB)
Sams Photofact #:CB-230 (Late 1978)
Modifications and fixes:
Options / Accessories:
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