70's Fender Silverface twin - heating up

[tadhg]

Hi guys I have a 76 fender twin silverface, only got in a while ago. Its been revalved by a pro, but I notice when I gig it, it gets really hot. The front panel get s really hot too, you can touch it alright but you couldn't leave your finger on it too long...its hot!

I was just wonderin if this was normal or is there a problem? I mean it sounds great and is very quiet no hums or other issues!!

All help on the matter greatly appreciated