I was about to start a new thread exactly like this one. Glad I found it. I'm literally having the same exact issues as you are right now.
Other than an Aguilar DB751 that gets occasional use, I've been using mostly lightweight stuff for years and wanted to finally pull the trigger on an all tube SVT. The 50th Anniversary Heritage seemed perfect.
I ordered the first one from MF. Pulled it out of the box and heard a "clink clink" inside. Was hoping maybe it was just a piece of a zip tie or something, so I unscrewed the grill and realized the fan wasn't even connected.
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Hoping that's what the noise was, I tipped the amp, heard the "clink" again and this fell out.
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Called Ampeg and they told me to send it back. The guy seemed embarrassed. Called MF and told them what happened. Waited over a week for it to be picked up - taped this to the top of the amp before I returned it.
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Finally, about 3 weeks later (today), I got my replacement. I took it out of the box and see this screw and washer floating around in the plastic.
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Take a look at the screw next to it in the above picture - it's also starting to come out.
Here's the hole where the screw was supposed to go:
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I took the amp out of the plastic bag and realized that none of the screws on the bottom of the chassis (I think they're the ones that hold the power section in place) were really even screwed in. I snugged them all up - one of them screwed in really wobbly and felt bent.
Anyway, I was finally able to try it out today and it seemed to work ok, although there is an audible hum and I'm running power through a Furman P-1800 PF Power Factor Pro floor unit. Not sure if that's normal, but now I'm gun-shy. Are these supposed to hum a little?
Really not sure what I'm going to do at this point, but I'm seriously taken aback that there'd be this many of Ampeg's flagship 50th anniversary amp with this many assembly problems.
Is everyone here still using their amp? Any problems? Do you guys think I should ask for a third or just give up and call it a day? Sometimes I feel like I have the worst luck in the world. UGH.
Any advice is appreciated.
-Chris