A boost transformer for an SPU from the 1990s Ortophone. The core was carefully selected from specially ordered Haimu Super Permaloys and used for the first time. If the impedance is low, it is compatible with various cartridges. There are some tape marks on the back (Murakoshi Yoichi)
Maintenance information: 2023.6.11 sound output confirmed
Accessories: none
Main specifications: input impedance 1 ohm to 6 ohms boost ratio 26 dB frequency characteristics 10 Hz to 100 kHz load impedance 47 kΩ or more size W150 x H108 x D112 mm weight approx. 1.7 kg