preselector

[ pree-si-lek-ter ]
/ ˌpri sɪˈlɛk tər /

noun Radio.

a preamplifier between the antenna and receiving circuit, used to improve reception.

Origin of preselector

First recorded in 1925–30; preselect + -or2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019