The unit I have has the fuse holders busted up, and before I go through the
hassle of replacing them (working through the LC filters attached to them)
I'd like to know if the originals were bayonet or screw-in caps. I'm
thinking that the HF Thunderbolt amp probably used the same types, so that
info may be of use as well.

adTHANKSvance,

Mark