Came home from work yesterday and noticed the LED's in my PassDiy F5 amplifier weren't lit. Still plugged in, breaker wasn't tripped, switch on; something was amiss. After dinner I opened it up and the fuse was blown, didn't see anything obviously shorted or damaged so I replaced the blown fuse. Powered it up and within a second or two the fuse blew again, the last remaining magic smoke releasing into the air from the left channel.
I swapped in another amp so I've got tunes; the old Rotel in the F5's place actually sounds a bit better , which leads me to believe that the F5 had been sick for a bit. I'd noticed a hum from the left channel recently as I worked on the bathroom adjacent to the left channel's speakers. I dismissed it, thinking I was focused in on the hum because everything was annoying me as I was having trouble figuring out a plumbing issue.
Not really sure what I'm going to do at this point. Looking at the amp boards themselves, they aren't my best work. Power supply, wiring, and chassis construction I am happy with. I could get my father in law to help me fault trace the issue and repair the amp, but some of the components in the F5 are getting very difficult to find, and must be matched with one another, which translates into a significant outlay money wise. On the other hand, the cool thing about the Firs****t clones is the power supply and heatsinks are universal throughout the line. diyAudio has a webstore now selling boards for a few of the PassDiy and Burning Amp designs with plenty of documentation. It would be pretty simple to pull the F5 amp boards out and replace them with an Aleph J for example.
Anywho, guess I was just feeling a bit bummed this morning. It was my first amp that I'd built, also the first audio project I'd completed without having a kit. Felt pretty proud that I'd been able to sift through the F5 thread and come out with a working unit. Guess it's just a good reason to have another project...