HP HP200

13 discussions on ElectronDepot about the HP HP200: what owners asked, what went wrong, and what fixed it.

What owners report

Mains power voltage drop to reduce usage?

Instead of rolling blackouts when there's a power shortage, why don't we just allow (or deliberately) the voltage and frequency to drop? Wouldn't that make a lot of devices use less?

THD claims of audio signal generators

My ancient Heathkit audio signal generator, which uses 3 tubes and a light bulb in an oscillator circuit, claims to produce sine waves with a total harmonic distortion less than 0.1%.My semi-ancient Hewlett-Packard HP202B oscillator only...

THD claims of audio signal generators

My ancient Heathkit audio signal generator, which uses 3 tubes and a light bulb in an oscillator circuit, claims to produce sine waves with a total harmonic distortion less than 0.1%.My semi-ancient Hewlett-Packard HP202B oscillator only...

Great test equipment designs

I was flipping through AoE III looking for anything on VCAs. (Doing a VCA whose noise doesn't tank at low gain is hard--I'll start another thread on that.) I noticed the "designs by the masters" sections, which are fun. My candidates...

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