Preamp tubes always become microphonic

[Resonator Guy]

I just got in the mail the new (Nov) issue of Vintage Guitar mag. This very amp is pictured on page 150, picture 6 along with some of my others.
JPF, I don't have solid core wire here, but will check out the wiring to see if it is shaking. With my eyesight I don't know if I can tell anything!