Posted by
Darwin, Keith on
May 17, 2007; 4:24pm
URL: http://elecraft.85.s1.nabble.com/K3-IF-AF-Dsp-questions-comparisons-tp447571p447594.html
I've had a couple of off-list replies as well, providing good defense
for the 6 dB per s-unit standard. Yes 6 dB is 4x the power but a linear
amp is usually 10x the power which is 10 dB or 2 s-units. Also S9+10 dB
would be a nice even 2 S-units over S9 or the equivalent of S11. If it
were 6 dB per unit, s9+10 would be something like S10.8 Yuck!
Anyway, whether it is 5 or 6 is less important than having it consistent
from S9 to S1 and I still say makers could easily do a better job of
producing a linear meter. There is a lot of room for meters to be
better without having to be lab quality. (Eric, hope it's not too late
for the K3).
- Keith N1AS -
- K2 5411.ssb.100 -
-----Original Message-----
>...but 6 db per s-unit just doesn't add up.
Sure it does. 6 dB is four times the power. Half an S unit is doubling
the power.
5 dB per S-unit means two S units are ten times the power and four S
units are one hundred times the power.
>S-meters are only useless because they've been built that way for too
>many years.
IMHO that depends on whether you want a receiver or a lab-quality
selective voltmeter.
73 de Jim, N2EY
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