The MRI Mastiff was manufactured by Mowat Radio Industries Ltd in 1964.

Other radios based on the same chassis:

4-valve metal-cabinet radio with optional intercom system.

Vermin-proof cabinet, designed for industrial / cowshed use.

Also released by Thorn as the Thorn Mastiff

Technical Information

Valves (4): ECH81, EBF80, ECL86, 6X4

Frequency Bands: 1

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

1964 MRI Mastiff

1964 Thorn Mastiff Chassis (same as MRI Mastiff?)

Other documented models using this chassis (2 in total)

1964 Thorn Mastiff