Part of the fun in playing with vintage Tube radios is the ability to tune the radio with different tubes. According to fellow audiophiles Micheal, there are two tubes that will greatly enhance the sound of the Grundig 5010 are namely ECC40 and EF80. I have managed to find a New Old stock Siemens EF80 and hope that it will further enhance the sound...
My current tubes set up are as per below photo:

As per the photos above, I am currently using the straight bottled Siemens EL12 tubes. I am also looking forward to playing with the coke bottled shape EL12 as below:
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