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In Reply to: RE: LM317 as a CCS , how to? posted by DAK on October 24, 2014 at 13:25:55:
I've tested a number of Zeners and voltage references in the 2.5V-12V range using an FFT. Some references are actually two-terminal ICs, not a single diode, and those tend to create more noise. The noise varies over frequency, becoming worse close-in. It's not unusual to see 500-1,000 nanovolts RMS below 100 Hz. Low noise Zeners are typically about 100-300 nanovolts. I don't know whether these levels would be audible in vacuum tube audio gear.
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- Zener Noise - Triode_Kingdom 15:56:24 10/25/14 (0)
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