I had an issue with the LA-1K where they had put too much heat sync compound under the finals, and when it heated up, it oozed out from under the transistor and arc flashed.? Luckily, I was on SSB and instantly stopped transmitting.? ?Removed the cover, and used a toothbrush to remove the excess heat sink compound, and fired it up for a 10 minute RTTY keydown, and it operated flawlessly for the test, and has in the two years since I had that issue.? ?Might want to check to make sure no heat sync compound is visible coming out from under the finals.
N5GGG
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