Here we have Audio Notes range of mains transformers, specifically linked to The original Audio Note kits, Like the Kit 1, 300B SE stereo power amplifier, and their L2 and L3 pre-amplifier kit.
TRANS-0103 pre-amplifier mains transformer. As used in the original Audio Note pre-amplifier kits.
As used in the original Audio Note kit 1 300B single ended stereo amplifier kit. Lead outs connections, transformer built on frame type.