AHA!! Now I understand. I installed the backlight at the same time that
I built my K1 so I never came across the instructions to use it as a
spacer...although it sure seems thicker than the gap between the display and
the backlight but I'm going just from memory.
So for those of you who build a K1 and install the backlighting option you
can mount that unused rubber piece between the main printed circuit board
and the bottom cover to prevent shifting of the VFO when you press on the
bottom. Not that that is a real problem in normal operation. Again...I
attached mine to the bottom cover and left the anti-stick paper attached to
the side facing the pc board.
----- Original Message -----
From: "Don Brown" <[EMAIL PROTECTED]>
To: "Elecraft Discussion List" <[email protected]>; "Tom Althoff"
<[EMAIL PROTECTED]>
Sent: Thursday, February 23, 2006 7:40 PM
Subject: Re: [Elecraft] Drift-K1
Hi
If I remember right that 1/2 inch rubber with the sticky tape on it is
used as a spacer for the LCD display. You are supposed to stick it on the
pc board under the display and then stick the display to it and then
solder the pins. I have not built a K1 lately (although I have built
several) so with the new backlight this may not be the way it is mounted
now.
Don Brown
KD5NDB
----- Original Message -----
From: "Tom Althoff" <[EMAIL PROTECTED]>
To: "Elecraft Discussion List" <[email protected]>
Sent: Thursday, February 23, 2006 6:10 PM
Subject: Re: [Elecraft] Drift-K1
Mike... That reminds me. I noticed that too. Whenever I picked up the
K1
and sqeezed the bottom it would shift maybe even more than 100Hz.
There was a small double sided sticky tape covered hard rubber piece in
my
packing material. I never saw what it was for in the instructions or if
it
even belonged in the K1 kit or not.
But I exposed one side of the sticky tape and pressed it onto the bottom
cover below the VFO section. Now when I sqeeze the distance between the
bottom cover and the PC board doesn't change much at all and the freq
shift
is reduced dramatically.
I just mention that in case others find a 1/2" black square with sticky
tape
on it in their K1 kits and would like to put it to good use.
Tom K2TA
----- Original Message -----
From: "Mike Morrow" <[EMAIL PROTECTED]>
To: "Elecraft Discussion List" <[email protected]>
Sent: Thursday, February 23, 2006 6:41 PM
Subject: RE: [Elecraft] Drift-K1
> >My K1 is very sensitive to placement. If I pick it up or turn it
> >upside
> >down, I can hear it shift up or down in frequency.
>
> Anything that squeezes or otherwise distorts the K1 bottom cover plate
(such as when the case is grabbed during repositioning) will cause a
small
frequency shift (I see well below 100 Hz), due to the change of metal
bottom
cover plate position near the LC VFO circuitry on the RF PCB. The
frequency
returns to original when the pressure is released on the bottom cover.
>
> 73,
> Mike / KK5F
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