We have had a number of requests for this tube so we decided to get a run of these made. The ECC823 is wired opposite of the ECC832. In the ECC823 the first half of the tube (pins 1, 2 and 3) are the high gain 12AX7/ECC83 spec and the second half (pins 6, 7 and 8) are the low gain 12AU7/ECC82 spec. So the ECC823 can be used in amps like the Mesa DC series in V1 to keep the clean channel stock and drop the gain down in the drive channel. Check your schematics or check with us before you order!