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