Hallicrafters SX-111 Amateur Band Receiver

Year of production: 1959-62

The SX-111 uses 14 tubes including the voltage regulator and rectifier.  It was a high end
receiver using dual conversion on all Amateur Bands.  With razor sharp selectivity in 5
variable steps, and Notch filter plus S-meter, makes it a great receiver.

80 meters............3.5 to 4.0 mc
40 meters............7.0 to 7.3 mc
20 meters............14.0 to 14.4 mc
15 meters............21.0 to 21.5 mc
10 meters............28.0 to 29.7 mc
WWV .................10 mc

Tubes:

V1............6DC6..........RF AMP
V2............6BY6...........1 ST MIXER
V3............6DC6..........1650 KC I.F. AMP
V4............6DC6..........50.75 KC I.F. AMP
V5A.........6BJ7...........A.V.C.
V5B............."...............DETECTOR
V5C............."...............A.N.L.
V6............6C4............1 ST CNVERSION OSC.
V7............5Y3GT........RECTIFIER
V8............OA2............VOLTAGE REG.
V9A/B.....12AX7........AUDIO AMP / B.F.O
V10..........6AQ5A........AUDIO OUTPUT.
V11..........6BY6...........PRODUCT DETECTOR.
V201........6BA6..........2 ND MIXER
V202.......12AT7........2 ND CONVERSION OSC.
V301........XTAL CAL.

Front Panel Controls:

Main tuning dial ( vfo )
RF gain control - 0 to 10
Band selector control. ( including wwv 10 mc )
Antenna trimmer control
Selectivity control
A.V.C. on / off switch.
B.F.O. on / off switch
Calibrator dial
Notch filter control, 4 selections
Audio gain control
Function dial AC on / off, standby, usb/lsb.
A.N.L on / off switch
Headphone input
S-Meter

Technical Specifications

Sensitivity............< 1 microvolt for a 10 db s/n ratio
Selectivity............ .5 ,1, 2, 3, 5. kc @ 6 db down
Speaker output.....3.2 to 500 ohms @ rear terminal screw
Headphone out.....50 to 2000 ohms front panel.
Antenna input....... 50 to 70, 2 rear mounted screw terminals +
chassis mounted socket , accepts RCA phone plugs.
Mute strip...............rear mount 2 screw type terminal strip for
remote cut-off of receiver.
Power source............105 to 125 vac, 50 to 60 cycles
Power consumption.. 83 watts.
Dimensions...............18 11/16" W, 8 13/16" H, 10 3/16" D.