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History of the manufacturer  

Red Line Equipment Pty. Ltd. (Swales & Swann); Melbourne, Victoria

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Name: Red Line Equipment Pty. Ltd. (Swales & Swann); Melbourne, Victoria    (AUS)  
Abbreviation: redline
Products: Others
Summary:

Red Line Equipment Pty. Ltd.
Factory: 2 Coates lane, Melbourne, Victoria.
Office: 157 Elizabeth Street, Melbourne, Victoria.

The company designed and manufactured all types of transformers and chokes for the Australian electronics industry.
Founded: 1946
Closed: 1970
Production: 1946 - 1970
History:

A.T Swales and Allen Swann started manufacturing transformers as Swales and Swann in 1946. [1] The company was registered in November 1947 as Red Line Equipment Pty. Ltd, incorporating Swales and Swann, with Directors Allen T Swann, TM Eberhard, GV Harris & ME Massey.[2]

In the early 1970’s the company became a subsidiary of GEC-AEI (Australia) Pty Ltd.[3]

Allen Swann also founded Radio Parts Pty. Ltd.

[1] Radio & Hobbies, July 1946, Page 16.
[2] The Herald (Vic.) Nov 10, 1947, Page 6.
[3] The Canberra Times (ACT) Sep 5, 1973, Page 23.

This manufacturer was suggested by Gary Cowans.

Some models:
Country Year Name 1st Tube Notes
AUS  48 Williamson Output Transformer AF series   Williamson Output Transformer, AF series Designed for the Williamson Amplifier usi... 
[rmxhdet-en]

Further details for this manufacturer by the members (rmfiorg):

[1]A.T Swales and Allen Swann started manufacturing transformers. Radio & Hobbies, July 1946, Page 16.tbn_aus_redline_1_radio_and_hobbies_1946_07_p16.jpg
[2] The company was registered in November 1947 The Herald (Vic.) Nov 10, 1947, Page 6.tbn_aus_redline_2_the_herald_vic._nov_10_1947_p6.jpg
List of all the transformers manufactured in 1948. The Australasian Radio World, Sep 1948, page 32.tbn_aus_redline_arw_sep_1948_p32.jpg
Transformers for a Williamson Amplifier. Amateur Radio, Sep 1949-inside-back cover.tbn_aus_redline_amateur_radio_sep_1949_inside_back.jpg
Power Transformers November 1948. Radio Science Nov-Dec 1948.tbn_aus_redline_radio_science_nov_dec_1948.jpg
  
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