• Country
• Australia

• Manufacturer / Brand
• Electrical Specialty Mfg. Co. Ltd. (ESM)

• Year
• 1936

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 162695

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

• Number of Tubes
• 6

• Valves / Tubes
• 1C4 1C6 1C4 1K6 30 19

• Main principle
• Superhet with RF-stage; ZF/IF 210 kHz; 3 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Storage and/or dry batteries / 2 & 45 & 67.5 & 135 & -1.5 & -4.5 & -9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 inch = 25.4 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Aristocrat 651 [Late] - Electrical Specialty Mfg. Co.

• Shape
• Console, Lowboy (legs < 50 %).

• Notes

• The RF stage is bypassed in case of shortwave reception.

  There is an early model 651 with a 1B5 instead of a 1K6 and adapted circuit around it.

  Used a 10" speaker with 20kΩ transformer.

  Also available as model 651V (late) with modifications to the filament wiring to permit 6 Volt storage battery operation.

  Mingay's IF Index and Radio Trade Annual 1939 gives IF frequency as 210 kHz but AORSM gives it as 465 kHz.

• Circuit diagram reference
• Australian Official Radio Service Manual Vol. I

• Literature/Schematics (1)
• Radio Trade Annual of Australia (7th Edition 1939, Page 201.)

• Literature/Schematics (2)
• Australian Official Radio Service Manual AORSM (Volume 1, 1938, Page 38.)

• Author
• Model page created by Stuart Irwin. See "Data change" for further contributors.

• Other Models

• Here you find 63 models, 19 with images and 15 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Electrical Specialty Mfg. Co. Ltd. (ESM)