Tube rolling for Jolida 502B

I was using a 502A until recently. For power tubes, I had great luck with the JJ Tesla KT-88s. Nice fat, warm sound. For the 12AX7s, the NOS Telefunken smooth plates are awesome - but expensive. For my 12AT7s, I used NOS Sylvania with gold feet - not that pricey, but great. Personally, I would go with new tubes for the power tubes and NOS for the preamp tubes - best of both worlds - great sonics and reliability.

Are KT 88's and 6550 interchangeable? I'm new to the tube scene. I ordered Electro Harmonix tubes to replace the Jolida labeled tubes in the pre amp which I'm sure are chinese in origin. That would give me all Electro Harmonix tubes at this point. Any suggestions?
Thanks ,
Dan

hi,

" Are KT 88's and 6550 interchangeable? I'm new to the tube scene."

Yes. There are some nos 6550's such as GE and Philips 6550's that are reasonalby priced and are wroth a try,

Larry

Thanks Larry. I saw at the tube store where the current electro harmonix power tubes are highly recommended. Maybe they aren't so bad after all.
Beernut

Beernut I thought you had a 302B. Perhaps I am mistaken.