General Coverage Communications Receiver	Rating (1-5): HHHHH (5)
Made In: United States 1959-1962	Voltages: 105-125 VAC 50/60 Hz
Coverage: 540 - 30000 kHz	Readout: Analog
Modes: AM/LSB/USB/CW	Selectivity: 6/4/3/2/1/0.5 kHz
Circuit: Triple Conversion Superheterodyne. 18 Tubes.	Physical: 19 x 10.5 x 13" 38 Lbs. 482x266x330mm
Circuit Complement: 6BZ6 RF Amp, 6BE6 1st Mixer, 6BE6 Converter, 6BA6 455 IF Amp, 6BE6 Converter, 6BA6 60 kHz IF Amp, 6BA6 60 kHz IF Amp, 6BV8 60 kHz IF Amp/AVC/AM Detector, 12AU7 SSB Product Detector, 6AL5 NL, 6BZ6 Crystal Cal, 6C4 HF Osc, 12AU7 60 kHz BFO/S Meter, 0A2 Voltage Regulator, 5U4GB Rectifier, 6AV6 1st AF Amp/AVC, 6AQ5 AF Output and 6BA6 455 kHz Gate. Double conversion below 7.85 MHz.
Features: •¼" Head. Jack • S Meter • Fiduciary Adjust • Calibrator 100 kHz • RF Gain • ANL • Antenna Trimmer • Vernier Tune ±3 kHz • Spkr. Terminals • BFO ±2 kHz • Bandspread • AVC OFF/SLO/MED/FST • Mute Line • Flywheel Tuning • Slot Filter ±5 kHz
Accessories: S-200 Speaker, 24 Hour Clock/Timer (shown), IF Noise Silencer
New Price: $429	Used Price: $400-800
Comments: Ranges: .54-1.05, 1.05-2.05, 2.05-4.04, 4-7.85, 7.85-15.35 and 15.35-30 MHz. Bandspread: 3.44-4.04, 6.81-7.3, 13.98-14.425, 20.925-21.6 and 27.89-29.7 MHz. Requires a speaker. An outstanding tube radio.
Variants: Model HQ-180C (shown) has clock. Model HQ-180RC is the rack version with clock. Model HQ-180XE has 11 fixed crystal positions and adds 230 VAC. This later "A" model, HQ-180A, features a solid state power supply, 230 VAC, 3 position BFO, accessory socket, less drift and 500 ohm line output. Model HQ-180AC has the clock timer built-in. Model HQ-180ARC is rack and clock. Model HQ-180AR was rack mounted version. Export model HQ-180AE operates from 117 or 230 VAC 50 or 60 Hz. Model HQ-180AX accepts 11 fixed crystals (6 can be changed from the front) $625. (Note that the X models cannot have the clock). Model HQ-180AXR same but rack mounted $675.
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Hammarlund PRO-310

General Coverage Communications Receiver	Rating (1-5): HHHH (4)
Made In: United States 1955-1957	Voltages: 105-125 VAC 50-60 Hz
Coverage: 550 - 35520 kHz	Readout: Analog
Modes: AM/CW-SSB	Selectivity: 4/2/.5 kHz -6dB.
Circuit: Double Conversion Superheterodyne. 14 Tubes.	Physical: 18 x 17.875 x 15.5" 65 Lbs. 457x454x394mm
Circuit Complement: 6BA6 RF Amp, 6BZ6 1st IF Amp, 6AN8 BFO/Buffer, 6BE6 1st Mixer, 6BZ6 2nd IF Amp, 6V6GT/G Audio Power Output, 6C4 Osc., 6AL5 Detector/Limiter, 5U4GB Rectifier, 6BE6 2nd Mixer, 12AX7 1st AF Amp, 6AL5 Bias Rectifier, 6C4 2nd Crystal/AGC and 0B2 Voltage Regulator. Single conversion below 2.2 MHz. Has five tuned circuits. Turret type band display.
Features: • ¼" Head. Jack • S Meter • Bandspread • Speaker Terminals • Sensitivity • ANL • BFO • Antenna Trimmer • Standby • AGC • Phono Input Jack • Calibrator 100 kHz. • IF Out Jack • Spinner Knobs
Accessories: Gray/Silver Speaker, Black/Gold Speaker, Rack Mounting Kit, Gray/Silver Rack Speaker, Black/Gold Rack Speaker
New Price: $595	Used Price: $520-1000A
Comments: Ranges: .55-1.11, 1.1-2.22, 2.2-4.44, 4.4-8.88, 8.8-17.76 and 17.6-35.52 MHz. Requires a speaker. A somewhat radical design for the time. Cabinet available in gray and silver or black and gold. Reportedly only 1000 made. Very collectable.

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