Columbus 77B
Columbus (Brand); Radio Centre Ltd.; Wellington
- Country
- New Zealand-Aotearoa
- Manufacturer / Brand
- Columbus (Brand); Radio Centre Ltd.; Wellington
- Year
- 1938/1939
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 172125
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 8
- Main principle
- Superhet with RF-stage; ZF/IF 456 kHz; 3 AF stage(s)
- Tuned circuits
- 9 AM circuit(s)
- Wave bands
- Broadcast plus 2 Short Wave bands.
- Power type and voltage
- Storage and/or dry batteries / 6 & -1.5 & -3 & -4.5 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
- Material
- Wooden case
- from Radiomuseum.org
- Model: Columbus 77B - Columbus Brand; Radio Centre
- Shape
- Console, Lowboy (legs < 50 %).
- Notes
- This model used a synchronous vibrator power unit. The 6E5 heater and the dial lights are separately switched. There is an "economy" switch which increases the bias on the 30 and 19 valves.
- Circuit diagram reference
- Australian Official Radio Service Manual Vol. I I
- Literature/Schematics (1)
- Mingay's Radio Diagram & I.F. Index
- Author
- Model page created by Stuart Irwin. See "Data change" for further contributors.
- Other Models
-
Here you find 167 models, 128 with images and 156 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Columbus (Brand); Radio Centre Ltd.; Wellington