Grunow 506 mid-late 1930's
Chassis 5-AD "Tuned Radio Frequency Receiver". Tunes only by the 6 pushbuttons
set with trimmers on the bottom. Tube compliment: 6D6, 6C6, 25L6, 25Z5, L55B ballast.
Patent labels say "Superhetrodyne Receiver".
The Vintage Electronics Expo Saturday, January 20, 2024 9am-4pm
Southfield Pavilion, 26000 Evergreen Rd, Southfield, MI