GP49 wrote:Quite a few transistor power amps used to burn all by themselves!
An old friend of mine named Tom Tutay, who now works a great deal with tube amps, used to play with solid state amps a lot as well. One time he took a Dyna ST-150 and made some alterations to the power supply. It was a Saturday night and I was hanging out at Tom's place. He was making up a spaghetti dinner and he had just powered up the Dyna. He had the cover off so I could see the work he'd done. He always did good work.
One of the electrolytic caps was mis-marked and got wired in backwards, which resulted in a dead short. Flames about 20" high came shooting out of the amp! Wow! Tom ran over and unplugged it right away of course. As it turned out, all he did was burn out a resistor. All of the output devices were fine. But it certainly was exciting for a moment there.