Are most tube preamps ‘ultra linear’?

Ultralinear circuit only applies to a tetrode/pentode tube amp with an output transformer having a screen tap.

I never had a ’triode’/’ultra-linear’ choice until I got my Cayin A88T 22 wpc triode/45 wpc ultra-linear.

1. the ultra-linear’ power doubles. no change in volume when you change back and forth, just a discernible different sound ,

and the ultra-linear has more headroom, reserve for transients, instantaneous dynamics if needed

2. I and all my friends definitely prefer the sound of ’ultra-linear’, which happily gives me the extra watts if needed,

my speakers are very efficient horns, rarely need much power, but it never hurts.

this thread belongs in the 'remedial education' folder

...the ultra-linear’ power doubles. no change in volume when you change back and forth, just a discernible different sound...

If you are learning about tubes, this is not remedial. Throw in 4 and 8 ohms taps and I am really lost! :-)

I read this thread because I am new to tubes.  Now I know a little about what ultra linear refers to.  The condescension in this forum is at times amazing.  Big fish in a shallow pond, I suppose.