[MRCA] Today's noise report

[Ray Fantini]

Thought Nepers was that little RCA Victor dog? How did those Europeans get a hold of him?

Ray F

________________________________
From: mrca-bounces at mailman.qth.net [mrca-bounces at mailman.qth.net] On Behalf Of W2HX [w2hx at w2hx.com]
Sent: Tuesday, March 18, 2014 5:34 PM
To: Al Klase; mrca at mailman.qth.net
Subject: Re: [MRCA] Today's noise report

If you really want to scratch your head, I have a German radio (Siemens) whose meter is calibrated in “Nepers!”
1 Np = 8.685 dB! (just shoot me now)

73 Eugene W2HX

From: mrca-bounces at mailman.qth.net [mailto:mrca-bounces at mailman.qth.net] On Behalf Of Al Klase
Sent: Tuesday, March 18, 2014 3:55 PM
To: mrca at mailman.qth.net
Subject: Re: [MRCA] Today's noise report

Hello Eugene,

While we're on the subject, it's a good idea if we're talking about something like the same thing.

Wikipedia's S-meter article states that by International Amateur Radio Standards S-9 = 50 uV in 50 ohms, and an S-unit is 6 dB.  Here's their table:

[cid:image002.jpg at 01CF42CF.F91218D0]
And from a handy calculator:  http://www.giangrandi.ch/electronics/anttool/decibel.html

1 uV = 0 dBuV = -107 dBm

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