Last one, real NOS from 1955. Fully tested on a TV7BU. See the pictures for test details, date codes and condition details.
Item Tag: EL34 6CA7 KT77
*EXTINCT* NOS QUAD HITACHI BLACKPLATE OO Getter EL34 ULTRA HIGH FIDELITY TUBES
These are the best sounding EL34 tubes I have for sale. I’ve always loved the sound of the fat base 1950s-early 1960s Mullard xf1 tubes and I still do but I can honestly say these defeat the Mullard xf1.