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Last modified 2017-08-14

Drake R-4B

A picture of Drake R-4B

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 10 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*297 mm (10.75*5.5*11.7")
Weight:7.26 Kg (16 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:0.25 uV (10 dB S/N)
Selectivity: 4.8 KHz (-6 dB), 20 KHz (-60 dB)
2.4 KHz (-6 dB), 8.2 KHz (-60 dB)
1.2 KHz (-6 dB), 4.8 KHz (-60 dB)
400 Hz (-6 dB), 2.6 KHz (-60 dB)
Image rejection:60 dB
AF output power/speaker:1.5 W at ?% distortion / 4 ohms (external only)
External speaker connector:




MISCELLANEOUS
Manufactured:USA, 1967-1973 (Discontinued)
Additional info:
Related documents:User manual (31 MB)
Modifications:
Options/Accessories:
CC-1
FS-4
MS-4
SC-2
SC-6
T-4B
Converter console
Frequency synthesizer
External speaker
2 m converter (requires CC-1)
6 m converter (requires CC-1)
Reciter