Just curious if someone more knowledgeable  than me might know what 
happened to my  amp.

Sent my AL-80B to Ameritron for service after hearing an arcing 
followed by a burning smell.

Just got an e-mail that  a cap on the parasitic board had failed and 
board was replaced.  $57 plus shipping.

Just wondering what might have caused this.    As I recall, I heard the 
arc when I switched from standby to operate, and  would smell the 
burning  odor anytime RF was  put to the amp.

Amp is 6 years old.  Just one of those things?    Maybe just a bad 
component?

Anyone run into something like this before?    I know there could be a 
number of reasons, or maybe no reason, but I'm just curious.

73, Steve KW3A