band selector , also: band switch

The band selector was swept over the military channels and back again, without result.

"Band Selector," the label said.

Many large portable radios can receive shortwave broadcasts: look for the notation SW, for shortwave, on the band selector.

Not all of these were re-exported, not all of them junked: Libyans were passionate virtuosi of the shortwave band selector.

Rotary switches were used as channel selectors on television receivers until the early 1970s, as range selectors on electrical metering equipment, as band selectors on multi-band radios, etc.