Jens
sorry about your malady.? since there are only a few changes from v3 to v4 to v5, I would start with that data.? the largest change in biased parts between them is the audio amplifier.? all the other major parts - PA, driver, bidirectional amplifiers are the same or very similar.? as you find anything suspicious in your measurements, list members can help if you post the data to your other thread.?
overheating - do check the regulators first to see what they are doing.? I will go check out that thread.?
Curt
