Zenith Royal [Mod I] Vacuum Tube Hearing Aid
The Zenith Royal [Mod I] vacuum tube hearing aid was manufactured
by the Hearing Aid Division of the Zenith Radio Corporation of Chicago,
IL beginning in October, 1952.
The Zenith Royal [Mod I] and the
Zenith Super Royal [Mod I] were the last vacuum tube hearing aid
models produced by Zenith. Four months later (February, 1953) Zenith
produced their first transistorized hearing aid, the
The Zenith Royal [Mod I] was identical to the Zenith Royal with one
exception. It had a t-coil, while the Royal didn't. You can see the
t-coil below the "ZENITH" name on the lower front. The t-coil
was called a
"phone magnet" in those days.
Adding the t-coil necessitated two other changes in the switch
placement (shown below). Apart from that, see the
Zenith Royal on the previous page for the
rest of the details of this hearing aid.