The Well-Mayde SG42 was manufactured for Johns Ltd by Wellmade Ltd in 1932.

The Kiwi, a 4-valve TRF radio produced in 1931 and 32

This set used a SG42 chassis (Screen Grid, 4-valve, 1932).  Photographed model has a replacement later model Courtenay speaker.

Technical Information

Valves (4): 35, 24A, 47, 80

Intermediate Frequency: TRF

Frequency Bands: 1

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

1932 Well-Mayde SG42

Original Schematic


1932 Well-Mayde SG42

Schematic as-drawn from model during restoration.

General Construction Notes for Wellmade Ltd:

Radios made for Johns in the 30's were often available in AC, DC or Battery. The inclusion of DC power options was because large tracts of Auckland (where Johns and Wellmade were situated) were supplied by DC power generation.