Unbehaun & Johnstone (WA) Ltd.
Bartletto Court, Hay Street, Perth WA (1904 – 1914) 
37 King Street, Perth WA (1914 – 1924)
Radio House, 383 Murray Street, Perth WA (1924 – 1937)

The company sold radios in Western Australia from 1920 till 1937. They sold radio valves and Western Electric, Tasma, and Philips sets. They also manufactured battery and DC powered radios branded "Air King".

Carl Albert Unbehaun (1851- 1924) and Edward Astley Johnstone (- 1954) founded Unbehaun & Johnstone in South Australia in 1897. [1]

In September 1904 they set up Unbehaun & Johnstone (WA) Ltd. as electrical contractors, also selling electrical products, telephones and lamps. [2]

They began selling radio parts and radios and named there new premises at 283 Murray Street, Radio House in February 1924. [3] As well as electrical products and lamps they sold Philips valves and imported Western Electric radios.

Mr John Wishaw left the Wireless Supplies Company in 1930 and joined Unbehaun & Johnstone and started designing and manufacturing radios for country towns in Western Australia that used 200 to 220 volts DC for mains power. They advertised these radios as “Radio’s Latest – the Air King”. [4]

In the 1932 Radio & Electrical Exhibition the company displayed Tasma and Air King Radios. [5]

They continued selling Philips, Tasma and Air King Receivers until the company was liquidated in January 1937. [6]

[1] Quiz and the Lantern (Adelaide SA), Jun 10, 1897, Page 15.
[2] The Daily News (WA) Sep 3, 1904, Page 5.
[3] Sunday Times (WA) Feb 10, 1924, Page 5.
[4] Encyclopedia of Western Australian Wireless and gramophones, Richard Rennie 2012.
[5] Sunday Times (WA) Apr 17, 1932, Page 7.
[6] The West Australian (WA) Jan 23, 1937, Page 14.