Maintained. A slightly rare Audionics MC transformer. It has a thick, mellow tone, and an appeal that is a bit different from modern models. It seems to be compatible with SL15, MC10, MC20, etc. from the 1960s and 70s. The label on the back is missing (Oikawa Tetsuji)
Maintenance information: 2025.9.27 Maintained (PASS/ON changeover switch contact cleaning)
Accessories: none
Main specifications: 35 dB gain, suitable primary side impedance 1.5 to 30 ohms