I thought I would post what I think (hope!) is my resolution for this.
I wrote to Elecraft's support line. Gary responded promptly (as always),
suggesting essentially that I remove L33 and the rubber bumper and do a
better cleaning job beneath the bumper, thereby moving L33 further away from
I'm wondering if there was any resolution to this problem, first posted just
over a year ago,
since I observe what I think is the identical problem with my K2 S/N 6982.
A related
symptom was obvious BFO shift when pressing down on the top cover just
behind the
A=B push button (for example, to
Cannot see any shift when trying to replicate this on my K2, #2498. I
suspect it is a poor joint or similar, or maybe even a torroid with
loose wires.
73 Dave G3YMC
On 5 Jan 2011 at 12:32, K1FFX wrote:
'm wondering if there was any resolution to this problem, first posted
just over a year
Bruce,
The K2 BFO will shift slightly if the bottom cover is deformed, but that
does not happen under normal conditions. Check to see if your K2 is
sitting on its feet properly. If you have something under the K2 or
have it on an uneven surface, it may be deforming the bottom cover
Hi, Don -
Thanks for the hint. Yes ... the shift when press symptom is definitely,
now I see, due to bottom panel interaction.I believe the bottom panel
is under stress from force exerted by the tilt stand (which I had a heck
of a time installing back when I built the K2). I will look into
Bruce,
Make certain that the two standoffs are mounted on the RF board and that
the bottom cover is installed with all 6 screws.
When properly secured, and with the tilt bail in either the up or down
position, the bottom cover should not move with pressure on the K2 top.
Be certain there
I think I've nailed it down as an interaction between the bottom cover and
L33, which mounted on that rubber spacer on the bottom side of the RF
board. I can get the same BFO shift effect by barely pushing on L33
with an insulated tool, for example. I took the cover off and measured
I'm having a problem with my K2 (SN 6761 10W/CW only): I have to align the
crystal filters almost daily. It seems the BFO shifts by 200 Hz or more almost
daily.
This may have been covered in the reflector at various times, but I've not seen
this exact problem described, so I've decided to go
Doug,
That is indeed a strange problem - I have not seen one like that, but
there is always a first. It has the flavor of a bad solder connection
in the BFO area - one that you are not likely to find by inspection, you
will have to re-flow the solder with a hot soldering iron. It could be
a
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