Hi Gretsch,
some tubes I liked on my Jolida 302b:
Powertubes: SED (Svetlana) EL43 or JJ E34L
I liked the SED a bit more than the JJ, smoother highs, a little softer bass, deeper soundstage. However, I had a couple of SED failing after very short time, with the JJ being very stable.
Preamp and driver tubes (my favorite combination)
12AX7 1970s Tesla E83CC Frame Grid gold pin
12AT7 1980s Mullard CV4024
Altnernatively the EH 12AX7 gold pin worked quite well also. Not as nice as the Tesla, but still good.
Preamp and driver tubes (alternative combination)
12AX7 1980s Jan GE 5751
12AT7 19??s BRIMAR 6060 T-Series Black Plates
Enjoy the Jolida! With the right speakers it is a great amp! And tube rolling is great for managing your upgrade urges...
Rene