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I need 2. I'm taking readings in circuit. Is that bad practice?

Thanks for the fast reply! As a follow up related to buying replacement parts, I've read that caps should be the equivalent storage value (or close) and the same voltage or higher when replacing. How about transistors? Eg. Q7 needs replacement. It's a Tis97. Mouser says it's obsolete, and...

Hi everyone, I'm a total novice to amp repair and electronics in general. I'm working on a 200 series two amp that blows the negative (-) supply fuse on start up. I have a soldering iron, a DMM, lots of hand tools, a service manual, and a brain. I'm pretty much learning as I go. My copious...