Home‎ > ‎Boatanchor Radio Receivers‎ > ‎R-392/URR‎ > ‎Technical Data‎ > ‎

R-392 Specifications

From the tech manual:

5. Technical Characteristics

Type of Circuit... Triple conversion superheterodyne on eight
lowest frequency bands, double conversion
superheterodyne on all other bands.

Frequency Range... 500 kc to 32 mc in 32 bands of 1 mc each
except the first band which covers 1/2 mc
(500 kc to 1 mc).

Types of signals... A1-cw, A2-mcw, A3-voice, F1-FSK

Number of tubes... 25

IF Frequencies:

First variable IF
(8 lowest bands).... 9 to 18 mc.

Second variable IF
(all bands).... 2.5-2.0 mc on 0.5-1.0 mc band;
3 to 2 mc on all other bands.

Third IF (fixed)... 455 kc

Selectivity..... 8, 4, and 2 kc IF (nominal) bandwidths.

Type of Tuning... Continuous; frequency read directly on
counter type frequency indicator.

Method of Calibration Built-in crystal calibrator.

Calibration points... Every 100 kc

Calibration accuracy Within 300 cps at any frequency in 100 kc
range (50 kc each side of 100 kc point)
when calibrated at nearest 100 kc point
to the received signal.

Sensitivity:
Modulated Signals FREQ AM Signals
0.5-1 mc 9 microvolts or better
1.0-2.0 mc 7 microvolts or better
2.0-32 mc 5 microvolts or better

(for 10 milliwatts ouptu with 10 to 1
signal plus noise to noise ratio and with
a 56 micromicro farad dummy antenna)

CW Signals 0.5-2.0 mc 3 microvolts or better
2.0-32.0 mc 2 microvolts or better

(for 10 milliwatts ouptu with 10 to 1
signal plus noise to noise ratio, carrier
on to carrier off) and with a 56 micromicro
farad dummy antenna)

Audio power output
(600 ohm impedance) 200 mw (nominal)

Nominal input voltage 28 volts dc; will operate with input of
25-30 volts; will operate at reduced gain
at input voltages lower than 25 volts dc
down to a minimum of 22 volts dc.

Power input... 3 amperes at 28 volts.

Antennas: Whip... 15 feet
Long wire Random length

Height 11 1/2 inches (29.2 cm)
Width 11 inches (27.9 cm)
Depth 14 1/8 inches (34.6 cm)
Weight 52 pounds 23.6 kilograms
Comments