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RE: Or, perhaps, it is the Buckeye input amplifier to blame?

An AP unit is expensive and while it would be a tax write off I wonder how many amps you'd have to sell to pat for it. Jason Stoddard, of Schitt, wrote about chosing test gear in his blog though I don't remember the details but I think they have less expensive alternatives for final test. The catch-22 maybe that if you are selling products with claimed super-low distortion that you need super-expensive test equipment to prove it. Maybe the upshot for both Buckeye and Purifi is to run a very high power, high frequency IMD test and if the result is good enough on reasonably priced test equipment then it is probably good enough.

I've no idea about the power shut down. My best guess, as before, is that a batch.of boards were built with the wrong value SMT components and final test does not push power to the limit.


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