frequency variation in K2

[Jeffrey D Travers]

If I turn on the K2, change the frequency, run the ATU and begin to
transmit, the K2 will revert back to the earlier frequency.  I haven't
been able to discern a meaningful pattern and it always occurs when I
am not watching readout!  :)
 
Has anyone experienced this?  If yes and you found a solution please
advise.
 
thanks
Jeff
VK3GMO
Jeffrey D Travers
[hidden email]
mob: [phone]
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[Bill Coleman-2]

On Jun 1, 2010, at 6:00 PM, Jeffrey D Travers wrote:

> If I turn on the K2, change the frequency, run the ATU and begin to
> transmit, the K2 will revert back to the earlier frequency.  I haven't
> been able to discern a meaningful pattern and it always occurs when I
> am not watching readout!  :)
>
> Has anyone experienced this?  If yes and you found a solution please
> advise.

Sounds like the K2 may be resetting to power-on startup. I see this occasionally if the RF in the shack is very high.

You also might check that your power supply voltage isn't dipping too low on transmit.


Bill Coleman, AA4LR, PP-ASEL        Mail: [hidden email]
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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[NQ3RP]

Jeff -

I had a similar problem on one of my older K2s.  It would jump frequency when I started to transmit.  I pulled the Control CPU, cleaned the socket and reinserted making sure all the pins made contact.  What you are describing sounds like either a bent pint not making good contact or corrosion.  Wouldn't hurt removing it, would it?  Might fix it.