• Country
• United States of America (USA)

• Manufacturer / Brand
• RCA (RCA Victor Co. Inc.); New York (NY)

• Year
• 1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 54543

• • alternative name: RCA Manufacturing || Victor Talking Machine

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 5

• Valves / Tubes
• 58 2A7 57 2A5 80

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz; 2 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast (MW) and Tropical/Marine/Police Band(s) = 150-200m.

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Power out
• 1.75 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: R-28 Ch= R-28-P [Cathedral, 2 bands] - RCA RCA Victor Co. Inc.; New

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Dimensions (WHD)
• 290 x 355 x 190 mm / 11.4 x 14 x 7.5 inch

• Notes

• R-28-P is actually a chassis for which many different cabinets have been made and marketed not only under RCA but for instance also as General Electric K-52 etc.

  Bunis/Slusser calls this cathedral a tombstone, but it has a round top and is a typical cathedral.
  
  There are two very similar schematics, one is for RCA Victor 110, 111 and 115 - see Beitman 1-179 and the other for the chassis R-28-P - see Beitman 1-169. The power consumption is 70W; Range: BC 540-1500 kc; SW: 1400-2800 kc. The tube 58 is the RF amplifier, the 2A7 first detector/oscillator. There is no IF tube but a 3 circuit band filter, followed by the tube57 as second detector and power amplifier 2A5. Thus the receiver GE K-52 has only 5 tuned circuits pus a tickler coil (L6) for the IF

  Advertised as Model R-28.

• Net weight (2.2 lb = 1 kg)
• 6.7 kg / 14 lb 12.1 oz (14.758 lb)

• Price in first year of sale
• 19.95 $

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Circuit diagram reference
• Rider's Perpetual, Volume 4 = ca. 1934 and before

• Mentioned in
• Guide to Old Radios

• Literature/Schematics (1)
• Machine Age to Jet Age II (See also Beitman 1-169 and 1-179.)

• Literature/Schematics (2)
• RCA Victor Service Notes "Red Book" Series

• Other Models

• Here you find 5131 models, 3234 with images and 4167 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from RCA (RCA Victor Co. Inc.); New York (NY)