Here we have some impressions about  hundreds of german made tube radios form the past 80 years 

Two Beauties - Telefunken 686 with AD1 in PP mode ( 1936 )

1955 Blaupunkt Santos with build in "bluetooth " modul and own power supply , that allows to use tablet or mobile-phone playing music via EL41 tube amplifier  from Blaupunkt Santos . - Complete old technic is original and untouched !