[Elecraft] Closing the Loop on My Killed KX1

[Don Wilhelm]

Clark,

It is good to hear that your KX1 is up and running again.

"Lord willin' and if the creek don't rise", I will be at FDIM again this 
year.  Hoping to see you there.

Your power output with that supply voltage is not unexpected.
Yes, you could install the KX1 power mod to your KX1.  If you always 
operate with the battery, that would be an OK thing to do, but if you 
also operate with a higher voltage supply, reduce the power to less than 
5 watts with the variable R4 pot (its adjustment slot is reachable 
through the hole in the bottom cover and in the KXAT1).

The technique for removing components from the board without 
professional grade desoldering tools is to clip the leads or crush the 
component (leaving enough lead to grasp with pliers) and removing the 
leads one at a time.  Clean up with solder wick, and if there is still 
solder in the hole, heat the solder pad and insert a wooden toothpick or 
stainless steel needle into the hole to clear the solder.

73,
Don W3FPR

PS: "if the creek don't rise" is indeed a valid consideration here - our 
driveway passes over a creek, and in a heavy rain, it has been known to 
overflow the driveway - it has only happened 4 times in the past 14 
years we have been here, but who knows when the next very heavy rain 
will occur.

On 3/26/2015 8:17 PM, engineercm wrote:
> Hi, Don.
>
> You may recall a couple of months ago I killed my KX1 by dropping a hot
> lead on the bare board. You suggested replacing the MPU and the first mixer
> NE602.  I'm happy to report the rig has been resurrected and is working
> fine. Removing and cleaning the solder pads for the NE602 was not easy.  I
> have not yet mastered the art of using soldering wick to remove solder from
> inside the hole.
>
> I'm getting 2.8w on 20//30/40 with 12.5 volt battery.  I have the 30m
> option, not the 3080 option.  Would the Power Option swap of two resistors
> be recommended for the 30m board?  I'm really not that excited about
> removing any more parts and cleaning soldering holes!  If I got .5w, it
> hardly seems worth it.
>
> I'm going to FDIM this year and hope to celebrate the 4 days in may
> anniversary.  Hope to see you there.
>