Sounds like an arc over and there is usually some trace of carbon but it can be hard to identify at times.
Another possibility is a cracked ceramic bleeder resistor. I am not familiar with the AC-4 but my L7 power supply uses large ceramic resistors and I had one develop a crack that was not casually obvious. Dennis AE6C On 8/25/12, Damien Mannix <[email protected]> wrote: > > > > > Hello all, I am embarrassed but most grateful for all the kindness and > helpful advice given to me. Too many to thank individually but many many > thanks to all. The safety advice is taken very seriously and I will be ultra > cautious bearing in mind my inexperience. Already I am puzzled. Astonished > in fact. A most careful examination of every component in the AC4 and then > the TR4, magnifying glass and high power flashlight and what a lot under the > TR4, shows no sign of distress to any component!! Clearly the bang came > from somewhere, I was not dreaming, so I guess it is time to carefully take > some voltage measurements from the AC4 as a first step. DamienG3XER > > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
