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AMP SUPPLY LK-450 ARCING ISSUES.


NOT SURE WHATS arcing. I have removed the tube and used a veriac to bring the voltage up slow over several days and in doing so you can hear a crackle or snap occationally untill 105plus volts on the veriac and then it blows the fuse on the veriac when no one is around. High voltage on the meter is around 3000v when it blows the fuse.
 
ernie1553 said:
NOT SURE WHATS arcing. I have removed the tube and used a veriac to bring the voltage up slow over several days and in doing so you can hear a crackle or snap occationally untill 105plus volts on the veriac and then it blows the fuse on the veriac when no one is around. High voltage on the meter is around 3000v when it blows the fuse.
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I'd look at the electrolytic filter caps
 
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It's an electronic minefield. If you don't know exactly where to step, "KABOOM!".

So to speak. But seriously, it has lethal voltages in it. High-voltage safety training is a must.

Even the pros will get careless and get "bit" from time to time.

Consider also that this amplifier is around 40 years old. If this were a car that old, you would expect to have multiple age issues to fix before taking a road trip. Never assume that an amplifier this old has "just one" thing wrong with it. The odds are against that likelihood.

73
 
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