• Country
• Australia

• Manufacturer / Brand
• Healing, A.G., Ltd.; Melbourne

• Year
• 1948–1954

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 142178

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

• Number of Tubes
• 5

• Valves / Tubes
• 1T4 1R5 1T4 1S5 3V4

• Main principle
• Superhet with RF-stage; ZF/IF 180 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 2 x 45 & 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Companion 503B - Healing, A.G., Ltd.; Melbourne

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 12.75 x 9.5 x 6.5 inch / 324 x 241 x 165 mm

• Notes

• MODEL: 503B.

  Features: 5V, B/C; tuned R.F. stage; 8" speaker; on/off control switch; loop type aerial in lid; external aerial and earth terminals; moulded carrying handle; leatherette covered wooden case with moulded plastic front panel; light brown; overall size 12¾" x 9½" x 6½"; weighs 17½ lbs.; lid lifts up and over cabinet in line with back when open; uses two 482 (Diamond 3482 ) "B", one 745 (Diamond 3745 ) "A".

  Retail selling price: £29/10/-. (FROM RADIO ELECTRICAL WEEKLY PORTABLES ON PARADE)

• Net weight (2.2 lb = 1 kg)
• 17 lb 8 oz (17.5 lb) / 7.945 kg

• Price in first year of sale
• 29.50 AUS £

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

• Mentioned in
• Radio Electrical Weekly, Portables Supplement, 29/10/1948.

• Literature/Schematics (1)
• -- Original-techn. papers. (Healing Service Data Manual, Pages 275 & 276.)

• Literature/Schematics (2)
• Australian Official Radio Service Manual AORSM (Volume 7, 1949, Page 146.)

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 415 models, 220 with images and 175 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Healing, A.G., Ltd.; Melbourne