[Elecraft] KX1 Problem Found problem maybe

[Bob C.]

Don and Jim thanks for your help. 

 I may have discovered my problem.  On page 18 of the KX1 manual it says "DO NOT TRIM the 28-pin socket pins before or after soldering. These pins are hollow and form the lower part of the socket for the IC pins."  

When building, I was so used to trimming pins after soldering that I made the error of trimming the hollow pins after soldering the IC socket.  When I first completed the KX1 I remember that U1 the MCU never seemed to seat fully but the radio worked fine so I never thought about it anymore.  Since having the problem I asked help on, I looked closely at the poor seating and re-read the manual (p18) and realize my major mistake.  In the process of trying to seat U1 today one of the pins broke off but I may be able to solder a small wire to the remaining base.

Question for Don, Jim or anyone with experience in this.

If I completely removed the ruined 28pin socket and am able to solder a little wire onto the broken pin of U1, would it work to carefully solder U1 directly to the circuit board without using the low profile 28 pin socket?

I suspect that all my problems stem from this error I made early on and was just lucky that it has worked for  almost 6 mos.

Thanks for all your help again,

Bob

WA4MQW


"Bob C." <wa4mqw at yahoo.com> wrote: Should have added that the problem continues even with no key installed..  I have since reseated the MCU but it still continues to transmit "dahs" when I turn on the power with no key installed.  

Read in the archives that another ham had the same problem with his back in June and have sent him an email.   

Any suggestions are appreciated.

72,

Bob

WA4MQW


"Bob C."  wrote: Has worked fine since building earlier this year but after returning from a trip via airline it starts transmitting as soon as I turn it on. Sending 'dahs" with a key plugged in. When I plug in a key I hear its side tone as I normally would under the continuous series of "dahs" being transmitted. When first turned on I see the band is 14mhz then the display only shows led bars when it is sending.

I will take it out of the case later in the week and see what I can find but wanted to see if anyone else had experienced the same problem and what was the fix?


73,

Bob

WA4MQW

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