The Bell Colt 3B7 Champ was manufactured by Bell Radio-Television Corporation Ltd in about 1957. It's part of the Bell Colt series.

The first 3-valve (4-valve equivalent, taking into account the rectifier) Colt

The Bell Colt 3B7 Champ is part of the 'Bell Colt' series.

There is considerable information on the main Bell Colt page about this long-running Kiwi icon.


Bell Colts ran from 1951 through until 1980 - the longest running model of NZ built domestic radio.  It saw many different engineering changes over the years, and the last few models dropped valves in favour of new transistor technology.

Please note that not all radios shown in this series were known as Colt's - the Planet, the Mercury etc were models in their own right - but they have a Colt chassis in them and so are included here as part of the wider Bell Colt dynasty.

The items in this series are

Technical Information

Valves (3 + selenium rectifier): ECH81, EBF89, ECL82, Flat Selenium Rectifier

Frequency Bands: 1

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

This Colt uses standard tuning... the other three-valve set (the 'Cadet') uses permeability tuning (no tuning gang, moving slugs inside coils).

Bell Colt Champ Schematic