From: "Roy Koeppe" <royanjoy@ncn.net>
To: "Amps Reflector" <amps@contesting.com>
Subject: [AMPS] Re: Power Output
Date sent: Fri, 9 Jul 1999 15:30:10 -0500
>
> ".91dB may only buy a few S-units, but that can make a huge
> difference..."
>
> 1 S-unit = 6dB
On my IC-751A:
S1-S2 change is .5 dB gradually changing to 5 dB per S unit by
the time S 9 is reached.
On my FT-1000(D) one S unit is about 1 dB at the low end, moving
slowly to six up around S8.
On my Drake R4C and 2B receivers, proper calibration is 5 dB per
S unit.
On my Collins 75S1, which has both a dB and S scale, it's ten dB
for every three S units.
On my FT-757, proper calibration is about 4 dB per S unit in the
technical manual.
Exactly who has a 6 dB S unit anyway?
When a signal is marginal, one dB can be all the change in the
world in readability. I don't think there is a S meter in the world that
is 6 dB per S unit, and most manufacturers seem to have used 5
dB or less as a design standard.
73, Tom W8JI
w8ji@contesting.com
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