Akai M8 Output Transformers

The Tamradio outputs from the Sony TC-500A are pedigreed so to speak, but the (likely Orion) outputs from the Akai/Roberts decks are almost exactly the same size and weight. Since the Akai/Roberts iron lacks the 500 ohm secondary the Sony has, it’s tempting to assume better performance on the 8 ohm secondary.

I saw on another forum there’s someone who plans to test both OPTs, and that’s likely to be enlightening. The praise for both is near-universal.
 
I’m not sure what you mean. Orion Electric was based in Osaka, and definitely manufactured the Akai/Roberts power transformers, at a bare minimum (Orion put their name on them).

If you’re saying that the Akai/Roberts OPTs look close enough to the Sony OPTs that they must both have been made by Tamradio, then I’d strongly disagree, as someone who has owned a bunch of both.