Re: Topband: Hi Z amplifiers for 160m

[Dave Cuthbert <telegrapher9@gmail.com>]

The document was published last year so we might assume the noise graph is
up to date. To put this in perspective,

To put the ITU-R P.372-14 claimed noise in perspective here's the
calculated antenna terminal voltage for a 100% efficient 1/4 wavelength
vertical in 500 Hz bandwidth. S-units are also shown.
Quiet receiving site -- 4.7 nV/m, vert 1.3 uV, S-4
Median city noise --      66 nV/m, vert 19 uV, S-8

    Dave KH6AQ (formerly WX7G)


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