german Vtg German Grundig 4570U Stereo Konzergerate Tube Radio For Parts Or Repair June 14, 2024 admin Vintage German Grundig 4570U Stereo Konzergerate Tube Radio. It powers on but I cannot get the radio to play any station. The tuning knob is not working properly. For parts or repair only. Wear and tear-scuffs, blemishes, stains, discoloration.