Some say the Sony TC 500- Tamradio output transformers are Nickel Alloy ?
Will measure both with the Akai M8 and Sony TC500 Tamdario transformers for freq responce with the Tektronix .
Will also measure inductance ,but by the sheer size they are unlikely to produce any serious bass below 40Hz .
The Tamradio has a 600 ohm winding so maybe quite useful for a headphone amp
The Akai doesn't have the 600 ohm winding, so there's more room for more copper on the primary. It also seemed to saturate more easily, so it may have an air gap that isn't quite as large, which will certainly help with primary inductance.Great , saves some work .
Sony 15H- 0mA DC
Akai 24H-0mA DC
quite a big difference for same size iron