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

[AD6XY]

Switches do fail, especially if only taking a light current. Advantest
spectrum analysers were famous for it. You might try some switch cleaner but
replacement may be the only option if the switch is sealed. The other
possibility is the solder contacts have failed somewhere through repeated
flexing. This may well be completely invisible on inspection. The cure is to
re-melt the solder on all the joints. The most likely contacts are those on
the switch, but also check the multiway headers.

Mike
 

K8MM wrote:
> 
> The most frequently used push button switches (for me they are BAND+,
> BAND-, MENU, MODE, XFIL, A/B, A=B) do go bad after a while. I own a pair
> of K2/100's and I've had to replace all of the switches I've already
> mentioned on each rig.
> 
> I'm friends with a couple of other local hams and they have had to replace
> some their frequently used switches on their K2's as well. So its not
> really that rare of an occurrence as they do start to malfunction after a
> while.
> 
> 73,
> Ian - K8MM
> 
> 
> 
> Don Wilhelm wrote:
>> 
>> Steve,
>> 
>> That certainly sounds like you have one of those rare occurrences - a 
>> bad switch.  It certainly can happen - actually most any part can fail 
>> at times, but a bad switch is quite low on my list of usual suspects.
>> 
>> 73,
>> Don W3FPR
>> 
>> Steve Kallal wrote:
>>> Don,
>>>
>>> I just spent most of the afternoon going over every trace that is part 
>>> of the connection between the Front Panel, RF, & Control boards 
>>> looking for solder bridges and frayed wires. Remember this started as 
>>> a volume control mod requiring cuts and jumpers on all the above boards.
>>>
>>> That said, I noticed the BAND+ tap/hold works every time if I push the 
>>> button differently. I normally push the button horizontally, that is 
>>> towards the rear of the rig. The tap/hold function works every thing 
>>> if I press vertically towards the bottom of the rig. That makes me 
>>> suspect the switch is going bad. It doesn't explain why the problem 
>>> just started after my other volume control mod.
>>>
>>> I will probably order some switches from Elecraft and see if that 
>>> fixes it.
>>>
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>> 
>> 
> 
> 

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