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K2: display quirk..

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VK7JB

K2: display quirk..

Hello All,

My base K2 is completed and KSB2, KNB2 and KDSP2 modules are installed and working well. I'm relieved. Thanks to Don for his reassurance along the way.

I've noticed a quirk with the display of my K2 and can't find it mentioned in the archives. While tuning with the VFO, the display will jump for an instant between either the power display or the keyer speed display. It is a very transient switch between the two displays. It occurs infrequently and I can't predict it. Changing the position of the keyer speed and power pots, in case they are close to some critical voltage position, hasn't changed the glitch. This makes no difference to the function of the K2, so I'm just ignoring it, but I'm wondering if its particular to my K2, or if others have noticed this. Seems to me like it might be a processor issue.

Now on with the KPA100...

Thanks and 73
John
VK7JB

Geoffrey Mackenzie-Kennedy

Re: K2: display quirk..

Hello John,

The display of my K2/100 #3255 behaves in similar fashion sometimes, albeit
not often. I was at first concerned that this quirk might be a symptom of
some serious problem, but the results of two tone IMD transmitter tests and
receiver noise floor measurements I made showed no change when the display
"jumped". Thus I no longer worry about it.

Did you find the cause of the problem you had when using your remote antenna
tuner?

73,
Geoff
GM4ESD

VK7JB wrote on Thursday, October 21, 2010 at 10:25 +0100:

> Hello All,
>
> My base K2 is completed and KSB2, KNB2 and KDSP2 modules are installed and
> working well. I'm relieved. Thanks to Don for his reassurance along the
> way.
>
> I've noticed a quirk with the display of my K2 and can't find it mentioned
> in the archives. While tuning with the VFO, the display will jump for an
> instant between either the power display or the keyer speed display. It
> is
> a very transient switch between the two displays. It occurs infrequently
> and I can't predict it. Changing the position of the keyer speed and
> power
> pots, in case they are close to some critical voltage position, hasn't
> changed the glitch. This makes no difference to the function of the K2,
> so
> I'm just ignoring it, but I'm wondering if its particular to my K2, or if
> others have noticed this. Seems to me like it might be a processor issue.
>
> Now on with the KPA100...
>
> Thanks and 73
> John
> VK7JB

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Don Wilhelm-4

Re: K2: display quirk..

In reply to this post by VK7JB

John,

Most K2s will do that on occasion. It normally happens when the
firmware is doing many tasks.
If it is frequent, then you may have a problem, but just occasionally,
no problem.

73,
Don W3FPR

On 10/21/2010 5:25 AM, VK7JB wrote:

> Hello All,
>
> My base K2 is completed and KSB2, KNB2 and KDSP2 modules are installed and
> working well. I'm relieved. Thanks to Don for his reassurance along the way.
>
> I've noticed a quirk with the display of my K2 and can't find it mentioned
> in the archives. While tuning with the VFO, the display will jump for an
> instant between either the power display or the keyer speed display. It is
> a very transient switch between the two displays. It occurs infrequently
> and I can't predict it. Changing the position of the keyer speed and power
> pots, in case they are close to some critical voltage position, hasn't
> changed the glitch. This makes no difference to the function of the K2, so
> I'm just ignoring it, but I'm wondering if its particular to my K2, or if
> others have noticed this. Seems to me like it might be a processor issue.
>
> Now on with the KPA100...
>
> Thanks and 73
> John
> VK7JB