I bought an ALPHA 8410 on 2/1/2012. The serial number is: 841012050301. The amplifier worked fine for about three weeks. After three weeks, the 250V/2 Amp fuse blew every time I turned the amplifier off. I finally ran out of spare 250V/2 Amp fuses and bought about 15 fuses from Radio Shack. The Radio Shack fuses did not blow every time I turned the amplifier off. Yesterday, I was tuning up on 20-Meters. When I reached 1200 watts, I heard a "sizzling" noise, smelled burnt electronic parts and noticed that the RF Output LEDs had extinguished. The Grid MIN and MAX LEDs work fine but I no longer have any illuminated LEDs when I tune up my ALPHA 8410. The LEDs themselves are not burned out because I can see them illuminate on tune-up. Also, the HV KV, GAIN and IPA LEDs still work fine.
On March 27, my ALPHA 8410 died on me while I was tuning up on 20 Meters. I heard a crackling noise and then smelled electronic parts burning, ie., resistors, inductor coils or transformer wire, and then I couldn't use the ALPHA any more to tune up. It’s completely dead!! No output whatsoever.