Are most tube preamps ‘ultra linear’?

Is ultra linear prefered ?

hard to discern this designation when reviewing specs.

emergingsoul09-29-2021 2:29am

jjss49 Details Discussions Posts This discussion Message User 6,612 posts 09-29-2021 at 03:04am Copy Comment URL Report Comment Edit Delete https://en.wikipedia.org/wiki/Williamson_amplifier https://www.pearl-hifi.com/06_Lit_Archive/02_PEARL_Arch/Vol_01/Sec_02/105_UL-ing_the_Williamson.pdf
imhififan Details Discussions Posts This discussion Message User 2,211 posts 09-29-2021 at 05:18am Copy Comment URL Report Comment Edit Delete Are most tube preamps ‘ultra linear’? No. ‘ultra linear’
jasonbourne52 Details Discussions Posts This discussion Message User 2,863 posts 09-29-2021 at 12:30pm Copy Comment URL Report Comment Edit Delete Ultralinear circuit only applies to a tetrode/pentode tube amp with an output transformer having a screen tap.