Elrog 300B tubes review is coming up

I’ve just received package from Thomas Mayer with nothing less then a pair of Elrog 300B tubes inside. I’ll be evaluation them in due time with 300B amplifiers coming in. You can call me a true 300B nut, as I’ve used to own more then 25 different amplifiers over the years. Even two mono-block amplifiers for the AKG K-1000. 
Stay tuned for more. Here are few photos of these beauties…