DRAKE R-4 User Manual

DRAKE R-4 RECEIVER

Amateur Band Communications Receiver
Made In: United States 1964-1965 Voltages: 120/240 VAC 50/60 60W
Coverage: Ham. See Comments. Readout: Analog Lin.
Modes: AM/LSB/USB(CW) Selectivity: 4.8/2.4/1.2/.4 kHz -6dB.
Circuit: Double Conversion Superheterodyne. 13 Tubes plus Semiconductors.
Circuit Complement: 12BZ6 RF Amp, 12BA6 Calibrator, 6HS6 1st Mixer, 6HS6 Premixer,
12BE6 2nd Mixer & Crystal Osc, 12BA6 50 kHz IF, 12BA6 50 kHz IF, 12AV6 AVC Amp/AVC
Detector, 6GX6 Product Detector/Audio Amp, 6EH6 Audio Output, 12BA6 NB Amp, 12AX7
NB Pulse Amp/Shaper, 1N625 NB Gate, (2) 1N625 AM Detector, ED-3004 Bias Rectifier, (2)
1N3756 PS Rectifiers, 0B2 and 1N625 Voltage Regulator. Product detector for SSB/CW and
diode detector for AM.
Features: •¼" Head. Jack • S Meter • Calibrator • AVC FAST/SLOW/OFF • Preselector • IF
Notch • PBT • Dial Lamp • RF Gain • Mute Jack • Speaker Jack • Anti-Vox Jack • Standby • NB
Accessories: MS-4 Speaker
New Price: $379 Used Price: $160-300
Comments: Supplied coverage: 3.5-4, 7-7.5, 14-14.5, 21-21.5 and 28.5-29 MHz plus ten 500
kHz crystal positions. Dial accuracy is ±1 kHz. Requires an external speaker. Matches T4 or T4X
Transmitter.
Variants: Models R4A and R4B.