The JJ ECC823 is wired in reverse of the ECC832 / 12DW7. In the ECC823 the first half of the tube (pins 1, 2 and 3) are the high gain 12AX7/ECC83 spec (gain factor 100) and the second half (pins 6, 7 and 8) are the low gain 12AU7/ECC82 spec (gain factor 20).
UPC NO:841358102363