The amplifier made in China is made very beautifully, but please think that the performance is about 1/10.
The self-made amplifier is not beautiful, but its performance is several times higher than that made in China.
EL84 Single Ended Amplifier DIY
Scemetic diagram for Para Feed
PMF 5WS by General Transformer Sales Co Japan made
3 of them are same charactor but 7189 is a little bit higer power