Elecraft] K3 Power calibration and current consumption

[Ken Kopp-3]

Hi Ken,
       
          Thank you for responding Wayne.

There isn't any "100 W calibration" on the K3. All gain calibration is
done at 5 and 50 W (and optionally 1 mW if you have a KXV3). These are
the points we picked do the cal, and the firmware then extrapolates
from there. So, how accurate the rig is at any setting from 13 to 100 W
depends on whether you've done the 50 W calibration.

There is one additional form of optional calibration: the K3's
wattmeter. See CONFIG:WMTR in the owner's manual.
         
        This is the method I eventually discovered to make the K3's
        wattmeter and the external reference wattmeter agree. The
        "correction factor" is 074 for my K3.  It seems that this
        adjustment would be part of the procedure on page 49.
        I stumbled on it "by accident", so to speak. (:-)

73! Ken - K0PP        


On Feb 26, 2009, at 7:42 AM, Ken Kopp wrote:

> I may well be the only one "caught" by this, but be sure that
> the TRANSMITTER GAIN procedure on pages 49 and 50
> of  the manual has been done, but also include the 100W level.
>
> IMO, the first paragraph under WATTMETER on page 49
> should read "... 5 W, 50 W , 100 W (K3/100 only) .... etc.
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[Bill W4ZV]

Ken Kopp-3 wrote

There is one additional form of optional calibration: the K3's
wattmeter. See CONFIG:WMTR in the owner's manual.
         
        This is the method I eventually discovered to make the K3's
        wattmeter and the external reference wattmeter agree. The
        "correction factor" is 074 for my K3.  It seems that this
        adjustment would be part of the procedure on page 49.
        I stumbled on it "by accident", so to speak. (:-)

73! Ken - K0PP

???  Calibration Procedures on page 48 of the Rev D1 Manual has Wattmeter Cal right after Synthesizer Cal and just before Transmitter Gain Cal.  Maybe you either have an old manual or missed it.  It's also mentioned on page 66 of the Rev E Assembly Manual but that manual refers you to the Owner's Manual for detailed instructions on all Calibration Procedures.

73,  Bill

[Mike B-12]

FWIW, it's on pg 46 in my original Rev C1 (11/18/07) manual, so it's been around
for quite a while.

> ???  Calibration Procedures on page 48 of the Rev D1 Manual has Wattmeter
> Cal right after Synthesizer Cal and just before Transmitter Gain Cal.  Maybe
> you either have an old manual or missed it.


73,

Mike
KW1ND
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[Gary Smith]

Is this not the same thing as the automated "Configure Transmitter
Gain" in the Elecraft Utility?

Gary
KA1J

> FWIW, it's on pg 46 in my original Rev C1 (11/18/07) manual, so it's been around
> for quite a while.
>
> > ???  Calibration Procedures on page 48 of the Rev D1 Manual has Wattmeter
> > Cal right after Synthesizer Cal and just before Transmitter Gain Cal.  Maybe
> > you either have an old manual or missed it.
>
>
> 73,
>
> Mike
> KW1ND
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> Elecraft mailing list
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>
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> Please help support this email list: http://www.qsl.net/donate.html
>

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[Bill W4ZV]

Gary Smith wrote

Is this not the same thing as the automated "Configure Transmitter
Gain" in the Elecraft Utility?

No it's not.  It's calibrating the K3's internal power meter to an external standard.  It's not absolutely necessary to do Power Meter calibration but TXG is necessary.

73,  Bill