[Elecraft] KX-1 KXBD1 KEYER ISSUE

[Ron D'Eau Claire]

On my KX1, the knurled screw does *not* reach through the threaded ferrule
on the case, so it's not possible to damage anything no matter how hard it's
tightened (other than to strip the threads if one tries to tighten it with a
wrench!).

It sounds like there may be some variation in the screws or key bodies if
some can actually reach through the threaded section and touch the board. On
my KXPD1, the knurled screw only shows about 1/8" of screw when pressed hard
into the hole on the paddle body. That's just enough to show at most 3
threads to mate with the threaded ferrule in the after passing through the
thickness of the case. If your knurled screw shows more than 3 threads or
protrudes more than 1/8" through the KXPD1 body, it might be possible to jam
against the edge of the PC board. That's easy to check. Just remove the
bottom cover and look to see if it's coming all the way through when
tightened. 

Note that you may need to wiggle the KXPD1 slightly to get the threaded
screw to go into the threaded ferrule on the case. The screw has to be lined
up with the threads in the case before it'll "tighten". 

Ron AC7AC 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David F. Reed
Sent: Wednesday, June 14, 2006 8:34 AM
To: k1um at bellsouth.net
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KX-1 KXBD1 KEYER ISSUE


Ken,

Whatever you do, do not over tighten the knurled screw; this can damage 
the circuit board behind it.

Look very carefully at why it is loose...

One possibility is that the internal board there is too close to the 
case, and that the knurled screw is not holding the paddle tightly 
because the board is interfering with it as it is screwed in.

If this is the case, you will want to be very careful in repairing it; 
you do not want to grind down the board, as there is a trace near the 
edge that can be ruined by that sort of action.
You might try loosening some of the mounting screws and repositioning 
the board slightly more aft of that panel.  This may not work though.

I personally prefer the method suggested to me by Jerry McCarthy, 
WA2DKG; that is to carefully grind a very short length off the knurled 
screw end, taking car to preserve the thread end as undistorted.  That 
way, it can pull the paddle flush against the case.

73 de Dave, W5SV

k1um at bellsouth.net wrote:

>I must have done something wrong...   When I plug the kxbd1 in it wiggles
>too much..
>
>Should I have screwed the knerled nut on the key jack?  The jack on my 
>kx-1 is flush with the upper conver so the nut wont screw on. 
>Suggestions to solve the case of the wiggling KXBD1
>
>thanks
>
>Ken K1UM
>  
>
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