Well, after having sat unused for maybe 3 months, I decided to give my '65 Gibson Mercury II a whirl today. Last time I used it, it was performing well and sounding great. I plugged it in, turned it on, let it warm up...played for about 6 or 7 second, and then...pfft pop! No sound! I turned it off. I noticed very stinky smoke coming from rear, seemed to be near power section. Crap! Pulled chassis, looked. All caps (which were replaced with new ones about 5 months ago when I got it) appeared in tact and unburnt. When I got it, the filter caps had burst and there was big burn mark on the chassis all over the section where the big old filter caps had been. Checked fuse, it was blown. Put in another, amp powered on...but only for a second, and second fuse blew. This is a SS rectified amp. The diodes were also replaced back when the cap job was done. The amp had been working fine since then but has been unused for a few months, as I said. Any idea what might be going on?