Assistive Listening Knowledge Base
  • Manufacturer technical bulletin

Technical Bulletin: 72 MHz FM Chart (TCH 010G)

From https://assistivelisteningknowledgebase.org/evidence/williams-av-2023-72mhz-fm-chart/ · record checked 9 October 2026

  • Williams AV

Manufacturer (Williams AV, formerly Williams Sound, which sells the FM systems charted here as well as infrared, hearing loop, Wi-Fi and Auracast assistive listening products)

Summary

A one-page chart of the maker's 17 channels at 72-76 MHz, marking the eight it says can run at the same time.

Key findings

  • Lists 17 channels between 72.1 and 75.9 MHz for all the maker's 72 MHz FM products, each with a frequency, a letter and a channel number.
  • States that the channels have been "frequency-allocated for best possible simultaneous group performance without interference" and that eight groups can operate at the same time using one channel each from its 8-channel set.
  • Its 8-channel set is 72.1, 72.3, 72.6, 72.8, 74.7, 75.4, 75.7 and 75.9 MHz, so some channels in the set are 200 kHz apart.

Limits

A manufacturer's chart without measurements or conditions (distance, power, receiver type) for its claim that eight channels run together. The date comes from the bulletin code (TCH 010G-0223) and the file's creation date of 3 February 2023; the page carries a 2022 copyright and the file name says 2020.

Read the original

williamsav.com/wp-content/uploads/2020/04/TCH-010G-FM-Chart-2020.pdf

Link checked . We link to the original and do not host copies.

Cited in

Cite this source

Williams AV. Technical Bulletin: 72 MHz FM Chart (TCH 010G). February 2023. https://williamsav.com/wp-content/uploads/2020/04/TCH-010G-FM-Chart-2020.pdf (accessed 9 October 2026).

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