Graham Kimbell (G3TCT) wrote:
>
> Julian
> Before you do anything drastic like looking for another radio, can I ask a
> silly question or 2?
> If the output power is flat across the AF spectrum when using ssb mode,
> why
> doesn't everyone use it rather than DATA-A?
>
Well the main reason as I
o it than that, but this too seems a
good idea.
73, Guy.
- Original Message -
From: "Kok Chen"
To: "elecraft list"
Sent: Sunday, February 15, 2009 12:31 PM
Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
> On Feb 15, 2009, at 2/158:58 AM, Guy Olinger,
ATA-A,
(with much higher power than called for) doesn't this actually give higher
rather than lower IMD?
Graham
- Original Message -
From: "Julian, G4ILO"
To:
Sent: Sunday, February 15, 2009 11:14 AM
Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
>
> I have just r
Bob Cunnings wrote:
>
> I'm not looking for another radio, as I've been doing what seems
> obvious (to me) - using USB mode for sound card digital operation, not
> DATA A. [snip]
>
Yes, I can see the logic in that, which is what I had to do with the K2
before the v2 firmware was released. But
jp...@jeffnet.org]
> Sent: Saturday, February 14, 2009 7:46 PM
> To: li...@subich.com
> Cc: elecraft list
> Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
>
>
> Hi Joe,
>
> > Further, single tone power calibration is only accurate for the
> > specific frequenc
I'm not looking for another radio, as I've been doing what seems
obvious (to me) - using USB mode for sound card digital operation, not
DATA A. Yes, I forgo the benefit of the management of compression
setting and mic selection that comes with using DATA A - but as things
stand now one must change
On Feb 15, 2009, at 2/158:58 AM, Guy Olinger, K2AV wrote:
> Taking the DATA A readings below at face value, the more than 2 db
> bump
> around 1000 Hz is rather startling. I'm not sure what could cause
> that, but
> at least to me that seems to be screaming for an explanation.
> There's
Guy, K2AV wrote:
>
> Taking the DATA A readings below at face value, the more than 2 db bump
> around 1000 Hz is rather startling. I'm not sure what could cause that,
> but
> at least to me that seems to be screaming for an explanation. There's an
> old fireman's adage "never go past fire"
Richard Ferch wrote:
>
> It seems as if part of the problem with the power control in DATA A mode
> may
> be that the power calibration appears to be done at an audio frequency
> which
> is sub-optimal for this mode. Ideally, the power calibration would be done
> at the point in the filter band
- Original Message -
From: "Joe Planisky"
To:
Cc: "elecraft list"
Sent: Saturday, February 14, 2009 7:45 PM
Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
> Hi Joe,
>
>> Further, single tone power calibration is only accurate for
>> the specific fre
It seems as if part of the problem with the power control in DATA A mode may
be that the power calibration appears to be done at an audio frequency which
is sub-optimal for this mode. Ideally, the power calibration would be done
at the point in the filter bandpass where the transmit filter's attenu
Ah! I must have been on an exact 5W setting when I did it, then, Joe.
Thanks for clearing that up.
I still think that as it's a calibration feature, it would make better sense
by being protected by the ability to turn it off. I'd really like to hear
why a calibration feature sits there awaiting
I have just run a set of tests across a range of audio frequencies as did
Joe, KB8AP. The results were almost identical, so I am not going to tabulate
them here. In SSB I adjusted the input level to give sufficient drive and
just enough ALC action to result in a flat output from 600Hz to 2600Hz.
Joe Planisky wrote:
>
>
> To test this, I used an audio signal generator to input single tones
> of various frequencies into my K3 in both LSB and DATA-A modes. I set
> the power control for 30W. Here are my measurements:
>
> AF input freq. Po-DATA-APo-LSB
> TUNE25.7
Joe Subich, W4TV-4 wrote:
>
>
> To normalize the radio's output power for any valid test you
> need to measure the single tone carrier power (e.g., CW). If
> you do that (press tune at 50 watts), you will recalibrate.
> The recalibration will render any subsequent measurement
> incompatib
Conclusion must be, never ever use 5.0W or 50W except
when calibration is needed.
Why cant power calibration be turned off? Then we would
not have this "source for trouble".
/ SM2EKM
Joe Subich, W4TV wrote:
>
>> So, if I'm tuning up through, say, a Z-Match into a doublet
>> and power ou
ge-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Lankshear
> Sent: Saturday, February 14, 2009 7:56 PM
> To: Elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
>
>
> So, if I'm tuni
So, if I'm tuning up through, say, a Z-Match into a doublet and power output
is set to "around" 5 or 50W and press "Tune" in order to tweak the Z-Match,
the initial (off-tune) complex impedance the K3 may see could very well
cause the K3's output power to change to 5 or 50W and because of that,
Hi Joe,
> Further, single tone power calibration is only accurate for
> the specific frequency within the IF filter on which the
> calibration is performed. If I calibrate power in CW mode
> that calibration point is approximately 300 Hz from one
> "corner" of the 2.8 KHz filter thanks to the way
of the radio and those factors that impact
power output.
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Julian, G4ILO
> Sent: Saturday, February 14, 2009 3:44 PM
> To: elecraft@mailman.qth.net
> S
Joe Subich, W4TV-4 wrote:
>
>
> You CAN NOT make those tests at 50 Watts! The power calibration
> circuitry will be constantly changing the internal gain. If
> the ATU is enabled and/or your dummy load is not flat the changes
> invalidate the measurements.
>
Why on earth not? I think yo
Behalf Of Julian, G4ILO
> Sent: Saturday, February 14, 2009 11:58 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
>
>
>
>
> Steven.Zabarnick wrote:
> >
> >
> > I installed the new beta last and tested the new output
I discovered that my cw power issue was due to a bad power supply for my
Elecraft W1 wattmeter. My cw power measurement now agrees with the K3
setting. I still see a 50% higher power output in Data A mode than the K3
setting -- this is an improvement over the nearly 100% that I was seeing
using pre
Steven.Zabarnick wrote:
>
>
> I installed the new beta last and tested the new output power control. I
> don't see any improvement in PSK31 output power using DATA A mode. I still
> get nearly twice the output power than I have dialed in by the PWR knob.
> In
> the previous firmware, the measur
I don't see a problem with CW on my K3 (29.4W measured, 30W
requested,) but there are definitely still problems with excessive
power output in DATA-A. DATA-A initially output the correct power,
but after switching to AFSK-A and back to DATA-A, I get well over 2x
the requested power out (71
On Wed, 11 Feb 2009 09:16:45 -0500, you wrote:
>
>I installed the new beta last and tested the new output power control. I
>don't see any improvement in PSK31 output power using DATA A mode. I still
>get nearly twice the output power than I have dialed in by the PWR knob. In
>the previous firmware
Hi Steve,
Seems to work correctly here even if I exceed the recommended 5 bars of
ALC.
73 Doug N3QW
- Original Message -
From:
To:
Sent: Wednesday, February 11, 2009 9:16 AM
Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
>
> I installed the new beta last and tested t
I installed the new beta last and tested the new output power control. I
don't see any improvement in PSK31 output power using DATA A mode. I still
get nearly twice the output power than I have dialed in by the PWR knob. In
the previous firmware, the measure output power in CW modes agreed with th
In a recent message, wayne burdick wrote ...
>
>K3 beta-test firmware revision 2.82 (with DSP rev 2.00) is now
>available. See release notes below.
Many thanks for the latest firmware - all installed successfully and
apparently working okay.
In a future release, would it be possible for the Pow
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