At the church i goto we have a behringer mixer and a compaq computer.....
we have the computer pluged in throuth a setero channel with quarter inch
jacks....
After about 15 mintues of running a video we get distortion... if we
unplug the computer the computer from the sound board the sound sound fine
again for another 15 minutes...
Any ideas?

http://electronicdesign.com/articles/index.cfm?articleid=17808&bypass=1

transistor turns 60

http://electronicdesign.com/Articles/Index.cfm?ArticleID=17798&bypass=1

bob