Battery Eliminators

 Download the Technical Data Sheet (PDF).

The ISO9VOLT battery eliminator allows Lectrosonics wireless transmitters with hinged battery doors designed for 9 volt batteries to be operated from external power sources. 10 to 18 volt DC is converted to regulated 9 volt DC to power the transmitter at the battery terminals inside the battery compartment. The modified door exposes the connector for the external power source yet still operates with regular dry cell batteries. The unit can supply up to 200 mA to work with the 250 mW transmitters. It is fused and protected from reverse polarity.

The unique design isolates the power ground from the audio ground in the transmitter allowing the unit to be used in “bag systems” common in field production. When the mixer, receivers and wireless transmitters in a bag are powered by a common battery, a ground loop is often created which can cause high frequency noise (whining or hiss) in the audio. The external DC is run through a low drop out 12 volt regulator, then passed on to a DC/ DC converter that produces an 800kHz square wave. The square wave is passed through a transformer, rectified and then passed through a low dropout 9 volt regulator to produce the final DC power presented on the battery contacts.

 Download the Technical Data Sheet (PDF).

• Allows external powering of all SM Series transmitters with 6 to 36 volt DC
• Fits in place of standard battery door on single and dual battery models
• Locking power connector
• Protected against shorts and reverse polarity

The SMBATELIM provides regulated 1.8 volts DC up to 1 amp to power all SM Series transmitter models for extended or continuous operation. The assembly is mounted to the transmitter housing in the same manner as the standard battery door. Circuitry is contained in a cylindrical housing in place of an AA battery, with a locking power connector.

The battery eliminator assembly is secured to the transmitter housing with a thumbscrew in the same manner as the standard battery doors.

The panel is notched for use on dual battery models so that a battery cannot be trapped in the unused compartment. An insert for the unused compartment is included to protect against dust and moisture.