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Re: K3 S-Meter and 6dB

Posted by Bill VanAlstyne W5WVO on May 17, 2007; 6:33am
URL: http://elecraft.85.s1.nabble.com/K3-IF-AF-Dsp-questions-comparisons-tp447571p447587.html

Toby,

Interesting. OK, I wasn't aware of that. Over here, it's a source of endless
debate (a bit of which I was engaging in). I'm quite certain there are no US
standards for an S-unit (IEEE, ANSI, etc.) Could be wrong, but I've never
heard anybody claim such.

I guess we give Wayne et al. a chance to get back from Dayton and see what
they have to say about it. I know Wayne wasn't very keen about a 6 dB S-unit
when I talked with him earlier, but maybe he isn't aware of this IARU Region 1
spec, either. Thanks for giving us the reference.

If 6 dB is indeed a recognized standard in at least part of the known world,
I'd have no trouble accepting that calibration on the K3. I still say 5 dB
makes more technical and intuitive sense, but no point in bucking the
established world order.  :-)

Bill / W5WVO


Toby Deinhardt wrote:

> Hi Bill,
>
>> How many dB an S-unit is depends on where you start from to get
>> there.
>
> Nope. At least on our side of the puddle IARU Region 1 Technical
> Recommendation R.1 defines how many dB a S-unit is.
>
> One S-Unit *is* 6dB.
>
> If the K3 is not 6dB per S-Unit, then yet again another useless
> S-meter in the eyes of many (if not most) amateurs over here.
>
> vy 73 de toby


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