The Columbus model 7VDW was manufactured for Columbus Radio Centre Ltd by Akrad Radio Corporation Ltd in about 1960.

7-valve dual wave 'Stereocoustic' stereogram.

Garrard RC210 automatic record changer (circa 1960)

Manufactured by Pye NZ / Akrad Radio Corp. shortly after Pye took over Radio Corporation of New Zealand, the original owners of the Columbus brand.

Technical Information

Valves (7): EF89, ECH81, EBF89, ECC82, ECL82, ECL82, EZ81

Intermediate Frequency: 455kc/s (probably)

Frequency Bands: 2

Chassis Notes(most schematics can be clicked to download a full size version)

Columbus 7VDW

General Construction Notes for Akrad Radio Corporation Ltd:

Akrad sets often consist of 3 (or 4) numbers (eg: 518, 1059) or number-letter-number (5M4), and a common pattern exists for these sets: The first digit(or 2 digits in the case of 10-or-more valves) is the number of valves, the second is the number of bands and the third is the last digit of the year. Where the middle digit is a letter rather than a number it generally refers to the type of set - M for mantle, P for portable, G from radiogram etc

Often sets can be dated by the speaker, as many Akrad sets from the Pye era have the date of manufacture stamped on the back of the magnet housing.