Still find mesh plate tube continually cause from their more musical delivered .
Philips 1560 tube is a full-wave rectifier tube that has globe/balloon shape
with 2 types of base.
European B4 base and American UX base with UX suffix ; 1560-ux.
1560-ux can directly replace 280 tube to get better performance from your current system.
Compare 3 types of rectifier tube in term of plate.
RCA UX280 – Philips 1560ux – Telefunken RGN1054
RCA UX280 solid plates.
Telefunken RGN1054 mesh plates with 1 of / filaments.
And Philips 1560-ux with modern mesh plates and 2 of // filaments.
Test filaments with TV-7A/U tube tester.
Glow in the dark and mystery looking.
Enjoy!
Cheer!!!