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
|