[Elecraft] K3 S Meter behavior

[Bob Stevens]

Amen!

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of ussv dharma
Sent: Thursday, July 15, 2010 2:36 PM
To: drewko; The Smiths; Tom W8JI
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 S Meter behavior

Aloha Peoples:

being raised in "tube type" electronics I do not profess to understand solid
state beyond the "hole " theory.   Thus, I REALLY DON'T CARE WHAT THE
RECEIVER/ANTENNA DOES TO THE SIGNAL...the main thing is that I can hear you
and understand what you are saying.

Is it "arm chair copy"?  Do you have an "old time 75 meter bodacious"
signal?  

Bottom line, It all does not matter as my antenna/receiver/filter/hearing
aid/ear combination effects the received signal that I just cant say how
strong your signal is....now, if I had a station equipped with all the lab
equipment I want, perhaps then I could tell you your 'RELATIVE' signal
strength.

my last post on this subject.

Grandmaw Susan
If you don't change direction you WILL arrive exactly where you're
headed!! Susan Meckley, Skipper W7KFI-mm  AFA9SM                        
USSV DHARMA 


--- On Thu, 7/15/10, Tom W8JI <w8ji at w8ji.com> wrote:

> From: Tom W8JI <w8ji at w8ji.com>
> Subject: Re: [Elecraft] K3 S Meter behavior
> To: "drewko" <drewko1 at verizon.net>, "The Smiths" <notforchat at hotmail.com>
> Cc: Elecraft at mailman.qth.net
> Date: Thursday, July 15, 2010, 6:27 AM
> > Personally, I would prefer that
> the s-meter not operate in this way in
> > ABS mode. RF Gain should have no effect on the s-meter
> action when in
> > ABS mode, just as ATT and PRE do not.
> 
> It would probably screw up (highly technical term) how the
> system works, or 
> require a separate receiver just for the S meter.
> 
> The RF gain must be ahead of the DSP system. This means the
> real signal 
> level to the DSP could be reduced 30 dB or even
> significantly more than that 
> amount.
> 
> How and why would someone design a DSP system that could
> measure the level 
> on a signal that was not actually present??? There is no
> cheap or easy way 
> to do that, so Elecraft does what everyone else does. 
> Ever since receivers 
> began, the RF gain will either affect the absolute S meter
> reading in 
> relationship to input level, or the S meter will show the
> increase in gain 
> reduction by increasing resting S meter reading as the gain
> is reduced.
> 
> I think you want something that cannot be done.
> 
> Besides, S meter are pretty much meaningless anyway. I only
> use mine to tell 
> me when I need to use an attenuator pad or a preamp.
> 
> 73 Tom
> 
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