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I wouldn't waste anything on a Chinese scope (or Chinese anything if I can help it). I have a BK Precision 1479A; apparently the original owner got it in 1976 and it was stored for who knows how long before I got it. It worked fine right out of the box. Its bandwidth is a pretty healthy 30MHz, more than enough for most TV work. I don't really know anything about trigger circuits but this one allows the user to select variable or automatic triggering. I know others here use scopes that are at least similar to mine.
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