[Elecraft] [K2] BAND+ push button failure...

[Don Wilhelm]

Steve,

As you said is only started after disassembling the front panel, I would 
suggest looking for some other cause than the button itself.  Check the 
soldering of the pushbutton well.  If you do disassemble the board from 
the front panel again, you might try soldering the pushbutton from the 
top - the leads do not stick very far through the holes and it may not 
have been heated adequately in the initial soldering process.

Pushbutton failures are rare.  They are sealed, so I do not think the 
cleaner spray would be effective, but it may be worth a try.  If you 
remove the left side panel, you can get to the edge of the pushbutton 
without disassembling anything else.

The microprocessor interprets the tap/hold selection, not the pushbutton 
itself - of course the contacts could be bouncing and causing the 
problem, but a bad solder connection might also behave that way too.

Steve Kallal wrote:
> I just did the AF-Gain-Control Mod on my older K2 sn 2289. After 
> reassembly, the gray BAND+ is starting to fail. It is used a lot for 
> KDSP2  programming and does always recognize a push and hold function 
> now. It often interprets it as a momentary push.
>
> I could and should just order the new part from Elecraft. I wonder if 
> some contact cleaner spray would help? I have some Radio Shack spray 
> cleaner already. I would like to hear from others on this reflector 
> first. It is odd that the failure started just after completely 
> removing the front panel and reassembling it.
>