1939 - BTH British Thomson Houston - Mercury Rectifiers Aug 27 Written By Iain I wonder when we will see an amp featuring these rectifiers from EMIA. BTHmercury vapor Iain
1939 - BTH British Thomson Houston - Mercury Rectifiers Aug 27 Written By Iain I wonder when we will see an amp featuring these rectifiers from EMIA. BTHmercury vapor Iain