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Austin Insulators Inc.
suppliers of RF insulators and transformers since 1933





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Austin Ring Transformers

> Single Winding Series
> Dual Winding Series
> E-Cap Series
> A-9600 Oil-Filled Transformer

Transformer Design History.

The traditional Austin air-spaced ring transformer is designed for both exterior and interior usage. The purpose of this product is to provide a means of coupling the 50/60 Hz supply voltage for tower lighting to the tower while maintaining RF isolation between supply and load.
Austin's Ring Type Isolation Transformers are developed for use on AM radio towers, where the incoming AC power line must be isolated from the tower lighting system. These transformers utilize a high quality, low loss steel
toroid core. This unique design allow the necessary 50/60 Hz AC power to be magnetically coupled through to the tower lights, while at the same time blocking the flow of RF energy from the tower to the AC power line by virtue of the extremely low primary to secondary capacitance (10-15 pF).
For sites which experience rain, fog, salt spray or sand/dust storms, a housing enclosure can be supplied to protect the transformer from the atmospheric elements.
Oil-filled tower lighting transformers with RF isolation values up to 250 kV rms. and beyond are also available. This type of transformer has its windings immersed in oil contained within a porcelain cylinder placed between steel end plates, thereby forming a transformer "module". These modules can be stacked on top of one another, in series, for very high RF voltage requirements.

Custom transformers are also available upon request.

Austin Ring transformers offer the following benefits:

  • Air Insulation - Minimum RF loss
  • Low Capacitance - Minimum and stable effect on tuning
  • Regulation - Better than 10% under normal load conditions
  • Efficiency - Better than 90% under normal load conditions
  • Mounting - Standard pipe unions supplied
  • Compatibility - Allow operation at either 50 or 60 Hz
  • Lightning Gap - Supplied as standard
  • Special transformer mounting kits are available to directly mount the Austin transformers onto Austin base insulators.


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