[Elecraft] Drift-K1

[Don Brown]

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" <althoff at verizon.net>
To: "Elecraft Discussion List" <elecraft at mailman.qth.net>
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" <kk5f at earthlink.net>
> To: "Elecraft Discussion List" <elecraft at mailman.qth.net>
> 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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