Q1 Yes, and a bit longer for SS (unless you leave it on all
the time)
Q2. Not an issue unless you have a bad tube. In a phono
stage you would need tubes measured for being especially
quiet, but most tubes would sound fine. I have never heard
tube rush from the seating position.
Not sure either issue would be a reason not to buy a tube
preamp or amp; and there are a lot of reasons to do so with
tube-friendly speakers (tube amps do not work well with all
speakers, speakers that need SS high current to drive their
impedance swings and dips to 4ohms and below -- not an issue
with tube preamps, though some tube preamps don't match well
with low input impedance SS amps ).
