Williams Sound ANT 021 Screw-to-PCB Antenna

The Williams Sound ANT 021 is a rubber duckie style replacement antenna engineered for use with Williams Sound's large-area FM transmitters, specifically the PPA T45, PPA T45NET, and PPA T27 models. Operating in the 72–76 MHz FM frequency band, it is purpose-built for assistive listening systems commonly deployed in houses of worship, theaters, conference rooms, and other venues where reliable wireless audio coverage is essential. The antenna measures 9 inches in length and features a 75-ohm nominal impedance matched to the transmitter output for efficient signal transfer.

The ANT 021 attaches via a screw-to-PCB style connector that threads directly onto the transmitter's circuit board antenna port, providing a secure mechanical and electrical connection without adapters or additional hardware. This makes it a direct drop-in replacement when an original antenna is damaged, lost, or needs to be swapped during equipment maintenance. While its compatibility is limited to specific Williams Sound models and its proprietary connector prevents use with other manufacturers' equipment, it fulfills its intended role as a reliable OEM replacement part for maintaining FM transmission performance in installed sound systems.