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Last modified 2017-08-20

Drake R-4C

A picture of Drake R-4C

SPECIFICATIONS

GENERAL
Type:HF receiver
Frequency range: 10-80 m in 5 bands (with supplied XTALs)
80 m: 3.5-4.0 MHz
40 m: 7.0-7.5 MHz
20 m: 14.0-14.5 MHz
15 m: 21.0-21.5 MHz
10 m: 28.5-29.0 MHz
Plus 15 optional XTAL positions for any 500 KHz
coverage between 1.5-30 MHz (except between 5-6 MHz)
Tuning steps:Continuous
Mode:AM/SSB/CW
Channels/memory management:-
Power supply:Mains: 120 / 240 VAC
Current drain/power consumption:Max 60 W
Antenna impedance/connector:52 ohms / RCA (Phono)
Dimensions (W*H*D):273*140*311 mm (10.75*5.5*12.25")
Weight:7.71 Kg (17 lbs)
Other features:PBT. VOX. 25 KHz calibrator




RECEIVER SECTION
Receiver system:Double conversion superheterodyne
1st IF: 5.645 MHz
2nd IF: 50 KHz
Sensitivity:10-80 m ham bands: 0.25 uV (10 dB S/N)
Other bands: 0.5 uV (10 dB S/N)
Selectivity: AM: 8 KHz (-6 dB), 28 KHz (-60 dB)
AM: 6 KHz (-6 dB), 10 KHz (-60 dB), optional
AM: 4 KHz (-6 dB), 7.5 KHz (-60 dB), optional
SSB: 2.4 KHz (-6 dB), 4.2 KHz (-60 dB)
CW: 1.5 KHz (-6 dB), 3 KHz (-60 dB), optional
CW: 500 Hz (-6 dB), 1 KHz (-60 dB), optional
CW: 250 Hz (-6 dB), 600 Hz (-60 dB), optional
Image rejection:60 dB
AF output power/speaker:2 W at 5% distortion / 3.2 ohms (external only)
External speaker connector:




MISCELLANEOUS
Manufactured:USA, 1973-1979 (Discontinued)
Additional info:
Related documents:User manual (2.1 MB)
Modifications:
Options/Accessories:
4-NB
FL-250
FL-500
FL-1500
FL-4000
FL-6000
FS-4
MS-4
Noise blanker
Narrow CW filter, 250 Hz
Narrow CW filter, 500 Hz
CW filter, 1500 Hz
Narrow AM filter, 4 KHz
Narrow AM filter, 6 KHz
Frequency synthesizer
External speaker