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Phil Allison Phil Allison is offline
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Default Low Frequency Mains Noise

"Paul Goose "


The resistor noise voltage generated, is on the anode circuit for
your tube, if you use the input noise voltage for a typical low noise
tube (12AX7), you have about 450nv (bw=1Hz) effectively at the grid.


** uh ????????

The EIN of a 12AX7 is in the order of 2uV in the audio band.

This equates to only **14nV ** per rt Hz !!


You're correct, 2uv is about right for a 12AX7, my figures are 1.8
uv from 25Hz to 10KHz (RCA manual). The question is.... is it pink or
white noise?



** Well, that reveals the DEPTH of this fool's ignorance of tubes.


Assuming it to be pink, normalizing to 1 Hz,



** What insane nonsense.

First - it ain't "pink noise".

Second, you cannot " normalise" pink noise to 1Hz of bandwidth.

Cos there is a ***small problem** with where in the spectrum that 1 Hz is.

**** off !!!!

You ridiculous idiot.



...... Phil