YBA 3a amp...

Hi - Looking for full specs of YBA 3a amp including what TYPE of amplification it provides. A, A/B? Can't seem to find anything on the web. Thanks in advance.
it's been many years since I owned this amp, but going off memory, I recall it being class A/B 50 wpm.
Its YBA 3 delta, not 3A. The delta symbol looks like an A. 50 W/channel.
Ahhh, makes sense. I was just reading the ad title.  Thanks