I've seen power transformers in some guitar amps where all the laminations were welded to a steel baseplate on two edges. Does anybody know if this is bad practice, or has any effect at all? I was just surprised to see it.
This is interesting since I have read elsewhere (perhaps on this forum) that resistance between laminations is important, so you would not want to, for example, clean, brush and polish the laminations...
...btw, I have always scratched my head on this idea.
I asked the same question a few months back after the large output transformer broke its welds and took out all the tubes in a Peavey VB-2 bass guitar amp.