[Elecraft] Drift-K1

[Tom Althoff]

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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