Here are the specifications of the Morrow MBR-5 receiver.

• Double conversion superhet. First IF is 1.525MHz. Second IF is 200kHz.

• Frequency Coverage: 3.5-4MHz, 7.0-7.3MHz, 14.0-14.35MHz, 21.0-21.45MHz, 28.0-29.7MHz. Bands are selected via a front panel bandswitch.

• 13 tubes.

• Antenna Input: 50-75 ohms - unbalanced

• Audio Output: 4.5 watts into 3.4 ohms.

• Modes: AM, CW

• CW Sensitivity: Less than 0.5 uv for 10db signal plus noise to noise ratio.

• Selectivity: 4kHz -6db.

• Frequency Readout: +-200 Hertz on all bands.

• 100 kHz Calibrator

• A.G.C.: On/Off.

• Noise Limiter: Self-adjusting series type.

• Squelch.

• Power Requirements: 250 volts dc at 74ma. 6v 4a or 12v 2a

• Dimensions: 11.75" wide, 4" high, 6.5" deep.

• Weight: 11 lbs

• Manufacture date: 1955-1957

• Tubes:

  6BZ6 RF Amplifier

  12AT7 Mixer/Osc

  6BJ6 IF

  6BE6 Mixer/Crystal Osc

  6BJ6 IF

  6T8 dETECTOR/BFO

  6AL5 Noise rectifier

  6AQ5 Audio Output

  6BJ6 Crystal Cal

  12AT7 Noise Amp/S-Meter

Latest update: 12/28/25