BOB is using a 1947 vintage Hallicrafters SX-28 Super Skyrider communications receiver..
Power consumption: 138 watts.
Audio output power: 8 watts.
Sensitivity for 500 milliwatts output: 6-20 microvolts.
Selectivity: I.F sharp:4.1KC@-3DB, 12KC@-30DB.
Selectivity: I.F broad:12KC@-3DB, 36KC@-30DB.
Selectivity: Xtal filter:300 cycles wide@ -70DB.
Frequency range: 550KC to 43 MC in 6 bands.
Audio frequency response: 70-3000cycles +/- 2.5DB.
Audio Output impedance: 5000/500 ohms.
Intermediate Frequency: 455KC
Dimensions, in table cabinet as shown:20.5"L x 10"H x 14.75"D.
Weight: 75 Lbs.