[Elecraft] P3 - Power up glitches with K3

[Matt Zilmer]

Software doesn't age over time.  It could be a problem with pin
contact resistance.  You can clean the connector pins off and see if
this helps.

73,
matt W6NIA

On Fri, 23 Dec 2011 17:40:35 -0800 (PST), you wrote:

>I've got a P3 connected to my K3 with all the proper connections.  
>
>K3 info:
>s/n 1206
>Firmware:  MCU 4.36, DSP 2.73, Flash Parameters 1.14
>P3 info:
>s/n 1490
>Firmware:  1.09 
>
>When I first hooked up the P3 a few months ago, I set the jumpers (and
>connected a power cable) to power it up from the K3.  At that time, I got
>immediate connection and immediate "talking" between the P3 and the K3. 
>Frequency and filter width showed up correctly immediately at power up.  
>
>After a couple of months, it appears to not immediately 'talk' with the K3
>upon power up.  Sometimes no frequency nor filter bandwidth are displayed. 
>Sometimes frequency is displayed, but no filter bandwidth. Sometimes the
>bandwidth shows up and is shifted off the right.  In all cases, I can
>manually power down the P3 and toggle it back up, and all those things
>eventually show up properly.  Sometimes it takes several on-off toggles (5
>or more).  In one instance, it didn't come up after several toggles, then
>about 10 minutes later they started talking correctly.
>
>Cables are tightly attached.  There is no movement to the rigs during use. 
>This appears to be software related, not mechanical.
>
>Ideas?
>
>- Phil, WA7URV