K1 problem solved

[David L DuPuy]

Don,  My K1 is working perfectly now.  I discovered that by tightening down
the front panel screw (under the tuning knob) I had pulled the FP printed
circuit board away from the panel, and that meant the P1 and J1 connectors
weren't parallel.  After reinstalling the screw loosely, then pushing the
front panel onto the RF board, and then carefully tightening that screw, I
got good contact on all pins.  It seems really strange to me that pin 5 was
the only one having problems.  Many thanks for your help...  I learned a
lot!   David
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Mike Morrow-3]

David wrote:

> ...I discovered that by tightening down the front panel screw
> (under the tuning knob) I had pulled the FP printed circuit
> board away from the panel, and that meant the P1 and J1
> connectors weren't parallel.

That does not seem normal at all.  My K1 front panel does not
flex as the flat-head front panel mounting screw is tightened,
however much I try.

Are you sure that the front panel stand-off (to which the flat-head
screw will attach) was mounted to the front panel PCB with *two* #4
lock-washers below it, as described and illustrated on page 20 of
the K1 manual?

Mike / KK5F
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Don Wilhelm-4]

David,

Check the number of lockwashers you used under the Front Panel standoffs
against the number specified in the manual.  The ones used between the
board and the standoff are really spacers (adding to the standoff
dimension) and are critical to keeping everything in alignment.

I would not advocate keeping a screw loose as the best solution to the
problem - it may work loose later and come back 'to bite you'.

73,
Don W3FPR

On 7/16/2013 4:07 PM, David L DuPuy wrote:
> Don,  My K1 is working perfectly now.  I discovered that by tightening down
> the front panel screw (under the tuning knob) I had pulled the FP printed
> circuit board away from the panel, and that meant the P1 and J1 connectors
> weren't parallel.  After reinstalling the screw loosely, then pushing the
> front panel onto the RF board, and then carefully tightening that screw, I
> got good contact on all pins.  It seems really strange to me that pin 5 was
> the only one having problems.  Many thanks for your help...  I learned a
> lot!   David
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Mike Morrow-3]

I wrote:

> My K1 front panel does not flex as the flat-head front panel
> mounting screw is tightened, however much I try.

That should have been "My K1 front panel *PCB* does not flex..."

73,
Mike / KK5F
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html