K3: RF gain settings forgotten in utility cal routine when using XG-2

[Stephen Prior]

All of a sudden, I'm having trouble with the K3's receiver following RF gain
calibration and S meter setting.  The RF gain calibration using the utility
leaves the receiver with S9 at -73dBm (using ZG-2) but when I turn off and
then on the K3 the S meter drops to S7 and the RF gain control, although
reducing the perceived signal strength, does not cause the S meter to rise.

The agc has completely default settings throughout.  For the purposes of the
calibration, the K3 is directly connected to the PC, not through the P3.
I'm running the latest firmware and K3 utility.

Having taken a break from typing this, I have only now just found that if I
choose to 'Use factory default RF Gain calibration data' then all is well,
so is this a bug within the latest utility I wonder?

Thanks

73 Stephen G4SJP




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[GM4KGK]

  Stephen
I'm also having problems doing an RF Gain Cal using the latest K3
Utility (and a few other recent versions).
Various error codes are displayed and the Rx sensitivity is well down
after I cycle the Power switch off and back on again. The S meter only
reads about S5 and the MDS drops from -136 dBm to about -120 dBm. Like
you, restoring the Factory Default settings gets me back to normal.

I have gone back to K3 Utility Ver 1.2.8.10 and everything works as it
should. The matter has been referred to Gary Surrency at Elecraft
support and I would expect a reply tomorrow. For info, I have completely
disconnected the P3 and the RS232 cable from the PC is run straight into
the K3.
73
Norman - GM4KGK

-----------------------------------

/All of a sudden, I'm having trouble with the K3's receiver following RF gain
calibration and S meter setting.  The RF gain calibration using the utility
leaves the receiver with S9 at -73dBm (using ZG-2) but when I turn off and
then on the K3 the S meter drops to S7 and the RF gain control, although
reducing the perceived signal strength, does not cause the S meter to rise.

The agc has completely default settings throughout.  For the purposes of the
calibration, the K3 is directly connected to the PC, not through the P3.
I'm running the latest firmware and K3 utility.

Having taken a break from typing this, I have only now just found that if I
choose to 'Use factory default RF Gain calibration data' then all is well,
so is this a bug within the latest utility I wonder?

Thanks

73 Stephen G4SJP/


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[Scott Ellington]

Has this been resolved?

I had a similar problem with the current utility and firmware as of 26 Sept.  I had previously calibrated the S-meter to the XG2, then a few day later it was town from S9 to S6.  I'm not aware of anything I might have done in the meantime to affect calibration.  I recalibrated it, which resulted in OF=18 and SC=14.  Unfortunately, I did not record the values for the first calibration.  I didn't measure MDS.

Scott   K9MA

K3 4657


On Sep 26, 2010, at 9:51 AM, N. Munro wrote:

>  Stephen
> I'm also having problems doing an RF Gain Cal using the latest K3
> Utility (and a few other recent versions).
> Various error codes are displayed and the Rx sensitivity is well down
> after I cycle the Power switch off and back on again. The S meter only
> reads about S5 and the MDS drops from -136 dBm to about -120 dBm. Like
> you, restoring the Factory Default settings gets me back to normal.
>
> I have gone back to K3 Utility Ver 1.2.8.10 and everything works as it
> should. The matter has been referred to Gary Surrency at Elecraft
> support and I would expect a reply tomorrow. For info, I have completely
> disconnected the P3 and the RS232 cable from the PC is run straight into
> the K3.
> 73
> Norman - GM4KGK
>
> -----------------------------------
>
> /All of a sudden, I'm having trouble with the K3's receiver following RF gain
> calibration and S meter setting.  The RF gain calibration using the utility
> leaves the receiver with S9 at -73dBm (using ZG-2) but when I turn off and
> then on the K3 the S meter drops to S7 and the RF gain control, although
> reducing the perceived signal strength, does not cause the S meter to rise.
>
> The agc has completely default settings throughout.  For the purposes of the
> calibration, the K3 is directly connected to the PC, not through the P3.
> I'm running the latest firmware and K3 utility.
>
> Having taken a break from typing this, I have only now just found that if I
> choose to 'Use factory default RF Gain calibration data' then all is well,
> so is this a bug within the latest utility I wonder?
>
> Thanks
>
> 73 Stephen G4SJP/
>
>
> _

Scott Ellington
Madison, Wisconsin
USA



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[wayne burdick]

Hi Scott,

I'm reviewing this issue with out PC software engineer. He already  
knows what the problem is, and we'll be releasing an updated K3utility  
(and K3 firmware, if required) as soon as possible.

73,
Wayne
N6KR


On Oct 1, 2010, at 7:35 AM, Scott Ellington wrote:

> Has this been resolved?
>
> I had a similar problem with the current utility and firmware as of  
> 26 Sept.  I had previously calibrated the S-meter to the XG2, then a  
> few day later it was town from S9 to S6.

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