[Elecraft] K1: Inp Menu Item Pdn Only Allows Dits

[crstrode]

MGFoster Wrote:
I turned on the K1 & tested to see if the problem still existed - it
did.  Turned off the K1 & unplugged, & exposed the bottom of the RF
board.  Powered up & inserted a bent component lead into the Dits &
Ground - OK.  The same on the Dash & Ground - OK!  Plugged the paddles
back in & it worked OK.

OK, so what happened there?

//////////////////////////////

This is very similar to my experience building K1 #2476 last month.  First
try with the paddle resulted in strange behavior - can't recall the exact
details, but very similar to your experience.  After I unplugged and
re-plugged a time or two all was well.

I also vaguely recall a similar phenomenon when K2# 3777 was built.

It almost seems like a micro-controller initial startup hiccup.


I'm guessing the notoriously spooky key jack may have had some debris, poor
mechanical alignment, stiff contacts, etc.

I was particularly careful when soldering the key jack to the board - just
enough heat to flow, but not melt the flimsy plastic housing.  I've
experienced more than one failure of these (both K1 and K2 key and headphone
) jacks so I always keep a spare on-hand.  Both rigs are woking A-OK (at the
moment) but I do try to limit the in-out cycles as much as possible to delay
the inevitable jack failure.

Carl
WA7CS




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