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Drake R4
Specifications

Return to Drake R4

Discontinued Amateur Receivers 

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R4 Specifications

Frequency Range ...... 3.5-4.0, 7-7.5, 14-14.5, 21-21.5, 28.5-29 MHz  
Optional Ranges ...... Ten 500 kHz crystal ranges
Modes ................ LSB, USB, AM, CW, RTTY
AC Power ............. 120/240 VAC 50/60 Hz 60 Watts
Antenna Input ......   52 ohms nominal
Selectivity ..........  @ -6dB     @ -60dB
                        0.4 kHz    2.6 kHz
                        1.2 kHz    4.8 kHz
                        2.4 kHz    8.2 kHz
                        4.8 kHz   20.0 kHz
Image Rejection ...... > 60 dB
I.F. Rejection ....... > 60 dB  
Sensitivity .......... < 0.5µV 
Freq. Stability ...... ± 100 Hz, ± 100 Hz after warmup
Freq. Accuracy ....... ± 5 kHz, 1 kHz vernier
I.F. Frequencies ..... 5645 kHz crystal lattice filer, 50 kHz tunable L/C filter
Audio Output ......... 1.4 Watt 
Audio Impdeance....... 4 ohms
Dimensions ........... 10.75W x 5.5H x 11.675D inches
Weight ............... 16 Lbs.


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