Performing some tests on a prototype circuit with an Audio Precision AP515 it was noticed that a particular power resistor showed an unexpectedly high amount of distortion, almost 0.5% THD+N.
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For some reason a scam artist has locked on to our phone number and keeps leaving this message. The message is just wrong at so many levels it’s funny in a pathetic sort of way. Nothing to do with anything really, just more fluff for the website.
In the past only relative low power loads have been needed for the evaluation of monolithic class D amp chips as they are typically 25 watts and under. Now working with some 200W (8 ohms) – 400W (4 ohms) amps and beefier load resistors are needed. The following little parts are now on the bench:
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Still fun though to think about the days when a pentode-triode tube was cool… And remember in 60 years someone will look back at your quaint designs with op-amps, microprocessors, etc., and think WTF how did they make anything work back then?
As part of an ongoing investigation in to excess noise (also called 1/f noise) from resistors I recorded some data taken with the AP515 and posting it here. All 3 tracks have 80 dB of gain added to them using Audacity. The actual signal level from the resistor is a few microvolts. The part being […]
Yes, that’s exactly what this is. It’s nothing but a bunch of placeholders until things are ready to go. You really have wasted your time if you’ve gotten as far as this page. While this was the first test post it seems a shame to delete it. So what the heck, we’ll just leave it […]