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Hated the SG613 sets
In the late 80s I thought I had the JA panel figured out but they'd fail on me in short order. Looking back, I think it was because I used ECG or SK transistors instead of the original numbers. I knew better than to sub the SG613 with anything. I had the same problem with one model of TMK set in the 90s. The SK transistors would overheat and die, even though the voltage/current ratings were OK. Pretty sure the problem was the substitute replacements were too slow for the switching supply. Probably something like that in the JA too. If I ever see a JA again I'll know better
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04-01-2016, 10:29 PM
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