Hi James,
Great work on the KA 8100. Recently received a dead 30 yr old Kenwood KA 501 stereo amp from a friend. Noted the voltage selector jammed between the 110/120V and 220/240V positions. Removed, cleaned it and set to 220/240V. Used dim bulb for 5 mins. All ok. Plugged into wall power. Still ok. After a few mins, connected MP3 into AUX. Connected a pair of 8 ohm speakers. When vol reaches 4, amp cuts out but reconnects 3-5 secs after vol is decreased. After 30 mins, there was shhhhh noise in left channel. 10 mins later there were gunshot sounds from left channel. Shut down amp. All electrolytic caps on pre-amp, tone and power boards are ELNAs (all original), and match the schematic. Some dried glue seen on the power board around the 2 main filter caps. What's causing this? I have repaired small transistor radios and boom boxes from the 1980's but this is my first attempt on a power amp. Any help most welcome.
