Product Summary

The Valcom VMT-1 Matching Transformer for Line Input is an essential tool for connecting telephone systems to public address amplifiers, enabling seamless telephone paging. It also serves as an output-matching transformer, allowing program material to be fed over a 600-ohm telephone line for "music-on-hold" functionality. With its high compatibility, it can be used with any amplifier featuring a 25V output connection.

Product Features

• Used as an input-matching transformer for connecting telephone systems to public address amplifiers
• Functions as an output-matching transformer for feeding program material over a 600-ohm telephone line for "music-on-hold"
• Compatible with amplifiers having a 25V output connection
• High-Z 10k-ohm primary impedance
• Lo-Z 600-ohm secondary impedance balanced with center tap
• Matches high-to-low impedance or low-to-high impedance
• Adapts line level signals to microphone inputs
• Equipped with phono jack or screw terminals for Hi-Z side
• Screw terminals for Lo-Z side
• Enclosed in a steel enclosure with mounting ears for easy installation

Specifications

• Primary Impedance: 10k-ohm (High-Z)
• Secondary Impedance: 600-ohm (Lo-Z), balanced with center tap
• Impedance Matching: High-to-low or low-to-high
• Signal Adaptation: Line level signals to microphone inputs
• Hi-Z Side Connection: Phono jack or screw terminals
• Lo-Z Side Connection: Screw terminals
• Enclosure: Steel with mounting ears

Learn More

• Impedance Matching on Wikipedia
• Telephone Paging on Wikipedia
• Music-on-Hold on Wikipedia