An Austin transformer is a special type of an Isolation transformer used for feeding the aircraft warning lights and other devices on a mast radiator antenna insulated from ground. As the electrical potential difference between the antenna and ground is high (up to 300 kV), feeding the lamps directly is impossible. The transformer consists of two toroidal (ring-like) windings with a large air space between the winding and the magnetic core. The large spacing provides both isolation from high voltage and low inter-winding coupling capacitance. A spark ball gap may be mounted across the transformer windings for protection against lightning strikes.
- Griffith, B. Whitfield (2000). Radio-electronic transmission fundamentals. Sci Tech Publishing. p. 367,. ISBN 1-884932-13-4.CS1 maint: extra punctuation (link)
- Mehla, Ishwar Singh (2018). AM Radio Tower Antennas. Chennai, India: Notion Press. Section 4.3.1(a). ISBN 978-1-64429-518-2.
- Austin insulators history, retrieved 2010 Nov 1
- Picture of an Austin transformer at a broadcast transmitter site, retrieved 2010 Nov 3