[Hammarlund] S Meter

[Ken Hickman]

Hi Mike & Gang,

>From my HQ-129-X manual reference the "S" meter:
"Each division represents a doubled signal strength over the previous
division."
"In production (the sensitivity) is arbitrarily adjusted to a reading of 9
for an input of approximately
50 microvolts."

Ken   N5CM

----- Original Message ----- 
From: "Mike Taylor" <reel2reel at hotmail.com>
To: <hammarlund at mailman.qth.net>
Sent: Saturday, July 08, 2006 10:32 AM
Subject: [Hammarlund] S Meter


Nearly all citizens band tranceivers have always used the same standard for
S meter readings. 50 microvolts at the antenna input is supposed to produce
a reading of S9 on the meter. Is this the standard that Hammarlund adhered
to, or did it vary over the years or by make and model? One curious thing is
the HQ129X, which doesn't really have an S meter. I'd call it as just a
signal strength indicator. Anyone know who invented the modern day S meter?
Did Oscar Hammarlund have anything to do with that? Mike
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