Similar to the ubiquitous "IL-19"; this box can be used as an isolation transformer with significant improvement. As you can see in the schematic below, each line of the circuit resolves to the other two via pin 1. This box will still function even with an open pin1, pin2 or pin3.

Frequency Response:   20Hz to 25kHz ± 1.5db. -3db @ 16Hz!

Intercom Isolation Box

This device is a handy isolation interface between two different intercom systems.

For Example: A Road Show wants to connect their lighting intercom channel to the house intercom system in order to call cues to the house spotlights. Or: The Video Department is using their own RTS System at the switcher and at cameras, and the main Production System is Clear-Com. With the "AudioMan ISO Box" you can achieve this while leaving both intercom systems intact. No need to disconnect or power down the house intercom base station or fool around with the camera CCU's.

This device will interface analog XLR 3 pin type intercom systems of any kind (Clear-Com, Telex, RTS, HME, etc.). Use to isolate a Wireless Intercom System (such as HME or Radio-Com) from the base station.

The box contains two 600 Ohm 1:1 transformers and four capacitors. The capacitors are intended to stop supply and "Call Light" voltage from damaging the transformers.

The internal electrical integrity of this product is guaranteed for life provided it is not exposed to physical damage or voltage in excess of 50 volts.

For More Information:   www.steve1mac.blogspot.com