Current Ameritron AL80-A amps built by MFJ may indeed have QC misfires.
I don't believe you'll find an AL-80A built by MFJ. The current equivalent product is an AL-80B and has some design differences from the original AL-80A units built by Ameritron prior to the MFJ acquisition. The front panel of an AL-80A and an AL-80B are completely different. As already pointed out, the AL-80 A and SB-1000 are the same. My 1989 vintage AL-80A is still trucking along at full output with the original Eimac 3-500 tube.
Tis True... Sorry, he didn't ask about the AL80B. ...has WARC 79 bands yadda yadda... I've heard numerous ill on the AL 80B. Never owned one so can't say much other than hear-say. Have owned both an AL80A and currently own an SB-1000. BOTH great amps.
So, back to the "depends on who built it" for the SB1000 and pre-MFJ, Ameritron company had no complaints by myself on the AL80A, but ALL companies push out a lemon from time to time.
Good point Stephen. None the less, if buying a used AL-80A ..wonder if MFJ would ever be trustworthy for ordering service parts...