Lectrosonics ISO9VOLTM Isolated Battery Eliminator with M-Style Door for M and UM Style Transmiters

The ISO9VOLT model is a comprehensive kit that includes a battery eliminator and a modified battery door. This kit is specifically designed to fit any Lectrosonics UM type belt-pack transmitter with a hinged battery door. By using the ISO9VOLT battery eliminator, users can power their wireless transmitters from external power sources instead of relying on traditional 9 volt batteries. The battery eliminator converts 10 to 18 volt DC to regulated 9 volt DC, providing a stable power supply to the transmitter. The modified battery door allows easy access to the connector for the external power source while still being compatible with regular dry cell batteries. Additionally, the unit is capable of supplying up to 200 mA, making it suitable for use with 250 mW transmitters. It is also equipped with fuse protection and reverse polarity protection for added safety.

One of the standout features of the ISO9VOLT model is its unique design that effectively isolates the power ground from the audio ground in the transmitter. This design is particularly beneficial when using the unit in "bag systems" commonly found in field production. In such systems, the mixer, receivers, and wireless transmitters are often powered by a common battery. However, this can create a ground loop, resulting in high frequency noise or interference in the audio signal. The ISO9VOLT model addresses this issue by running the external DC power through a low drop out 12 volt regulator, followed by a DC/DC converter that generates an 800kHz square wave. This square wave is then passed through a transformer, rectified, and finally regulated to produce the 9 volt DC power that is delivered to the battery contacts.

It is important to note that the battery eliminator has only been tested with Lectrosonics transmitter types specified by the manufacturer. Using the ISO9VOLT model with any other device will void the factory warranty and may result in damage or improper operation. Lectrosonics does not accept responsibility for any issues that may arise from using the battery eliminator with unauthorized devices. Therefore, it is strongly advised to adhere to the manufacturer's recommendations and limitations to ensure optimal performance and avoid any potential complications.

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)