Lectrosonics ISO9VOLT Isolated Battery Eliminator without Door

The ISO9VOLT battery eliminator is a device that allows Lectrosonics wireless transmitters, specifically those with hinged battery doors designed for 9 volt batteries, to be powered by external power sources. By converting 10 to 18 volt DC to regulated 9 volt DC, this eliminator provides the necessary power to the transmitter through the battery terminals inside the battery compartment. The modified door of the eliminator exposes the connector for the external power source while still allowing the use of regular dry cell batteries. With a capacity to supply up to 200 mA, it is compatible with 250 mW transmitters and is equipped with fuse protection and reverse polarity safeguards.

One of the standout features of this battery eliminator is its unique design that effectively isolates the power ground from the audio ground in the transmitter. This feature makes it particularly suitable for use in "bag systems" commonly found in field production. In such systems, where the mixer, receivers, and wireless transmitters are powered by a common battery, a ground loop can often be created, resulting in high frequency noise in the audio, such as whining or hissing sounds. To address this issue, the external DC power is first passed through a low drop out 12 volt regulator, then through a DC/DC converter that generates an 800kHz square wave. This square wave is then transformed, rectified, and finally regulated to 9 volts, ensuring clean and stable power delivery to the battery contacts.

It is important to note that the battery eliminator has only been tested with specific Lectrosonics transmitter types as indicated. Using it with any other device will void the factory warranty, and Lectrosonics cannot guarantee proper operation or accept responsibility for any damage caused to other devices. This highlights the importance of using the battery eliminator within its intended scope and with compatible equipment. By adhering to these guidelines, users can benefit from the convenience and reliability offered by the ISO9VOLT battery eliminator in powering their Lectrosonics wireless transmitters.

Technical Specifications

Input
Minimum: 10.5 VDC
Maximum: 18 VDC
Connector: DC sleeve type
Output
Voltage: 9 VDC regulated
Power: 200 mA maximum
Size and Weight
Height: .67 in. (17 mm)
Width: .99 in. (25 mm)
Length: 1.76 in. (45 mm) housing only
1.91 in. (49 mm) including battery contacts)
Weight: .6 ozs. (16.4 grams)