The Thermiodyne is generally
recognized as the first "single dial" tuned radio. Unfortunately,
in order to operate properly four "trimmers" were needed, effectively
making it a five dial set!
Grebe Synchrophase
Model MU1
1924
Freshman Masterpiece
1926
Crosley Pup
1923
Stewart Warner 300
1925
RCA Radiola 25
1925
Kennedy V
1923
Gilfillan GN4
1925
Atwater Kent 35
1926
AtwaterKent 33
1927
Tyrman 50
1929
RCA Radiola 20
1925
Radiola 26 with
Home Battery Box and Antenna Tuner
1925