Originally ELROG was founded 1986 in Lüneburg. The roots of the company reach all the way back to the famous Telefunken tube works in Ulm. In 2016 ELROG was forced to register for the insolvency process due to financial troubles. All assets, production machines, brand name and know how were acquired by Tube Amplifier Designer extraordinaire Thomas Mayer. ELROG tubes now continue to be produced on the original production line at the original facility in the city of Hagenow in Germany.

Since the founding of the new company all tube designs went through significant upgrades to improve sound quality and long term reliability. The product portfolio got extended from the original line up of 211, 845 and 300B and includes 18 different tube types today. The tubes are entirely hand made in Germany by highly skilled and passionate people.