KRX3 Install Problem: Extra Standoff, Front Panel Board

[Jeffrey Maass]

I am in the middle of installing the KRX3 in my
K3/100 (s/n 1152), and have bumped into a "stopper".

I am at the point of re-mounting the main DSP board
to the front panel board. I find that there is a
metal standoff mounted on the front panel board near
J31 which is in the place that the newly-mounted
nylon standoff (same length) is mounted on the
Main DSP board. This standoff is attached to the
Main DSP board in the KRX3 instructions at the
top of page 17.

Has anyone else run into this?

Can I remove the nylon standoff from the Main DSP
board and leave the metal standoff on the Front
Panel board in it's place? It looks like there are
some components on the Main DSP board near where
the top of the metal standoff will rest.

I **really** don't want to remove the front panel
board from the front panel assembly to remove the
metal standoff, especially without explicit
instructions. I'm sure that there are a screw and
lock washer behind the between the board and the
front panel, so unscrewing the standoff is a
crapshoot of whether the parts behind will come
out with some shaking.

I've placed a photo of the metal standoff on the
Front Panel board online at:

 http://www.k8nd.com/FrontPanelStandoff_3489.jpg


73,

Jeff  K8ND
 

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[AC7AC]

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[Jeffrey Maass]

G'day Ron:

You misunderstand my situation.

I *have* mounted the nylon standoff to the
Main DSP board as you describe.

My problem is that there was *already* a metal
standoff mounted on the Front Panel board, in
the hole that you mention as vacant, and on
which the nylon standoff rests. That standoff
was mounted at the time of original construction
(not by me), and is shown in the photo for which
a link was provided.

So, when it came time to re-mount the Main DSP
board to the Front Panel board, the new nylon
standoff on the Main DSP board want to sit **on
top of** the metal standoff on the Front Panel
board (obviously not possible). You can see this
in another photo at:
http://www.k8nd.com/Duelling_Standoffs_3485.JPG

One of the standoffs has to go. The only question
I have is whether I can leave the metal standoff
in place and remove the nylon standoff, or
whether I need to disassemble the front panel
assembly to take off the metal standoff.


Thanks.

73,  Jeff  K8ND
 

> -----Original Message-----
> From: Ron D'Eau Claire [mailto:[hidden email]]
> Sent: Saturday, January 03, 2009 12:26 PM
> To: [hidden email]; [hidden email]
> Cc: 'W8TK Tom Kravec'
> Subject: RE: [Elecraft] KRX3 Install Problem: Extra Standoff,
> Front Panel Board
>
> You're looking at the wrong place, Jeff.
>
> Check Fig 9 in your KRX3 manual where it shows the screws to
> remove to take the main DSP board off of the front panel
> board. Arrows point to the three screws that thread into the
> standoffs on the front panel board.  
>
> Look to the LEFT of the lower left screw in that figure, and
> you'll see an empty hole in the aux DSP board near the VFO B
> encoder. That empty hole is where the nylon standoff goes on
> the aux DSP board, very close to the VFO B encoder.
>
> The nylon standoff will rest against the front panel board just to the
> *left* of the electrolytic caps on the left edge of the
> picture you posted.
>
> There's actually a hole in the front panel board where the
> nylon standoff rests, but it's not screwed onto the front
> panel board. It's only function is to keep the main DSP board
> from being pushed forward toward the front panel board when
> the connectors mate.
>
> Ron AC7AC
>
> -----Original Message-----
>
> I am in the middle of installing the KRX3 in my K3/100 (s/n
> 1152), and have bumped into a "stopper".
>
> I am at the point of re-mounting the main DSP board to the
> front panel board. I find that there is a metal standoff
> mounted on the front panel board near
> J31 which is in the place that the newly-mounted nylon
> standoff (same length) is mounted on the Main DSP board. This
> standoff is attached to the Main DSP board in the KRX3
> instructions at the top of page 17.
>
>  http://www.k8nd.com/FrontPanelStandoff_3489.jpg
>
>
> 73,
>
> Jeff  K8ND
>  
>
>

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[Jeffrey Maass]

 
G'day Ron:

My profound apologies for doubting you!

I had, indeed, put the new nylon spacer in
the *wrong* hole on the Main DSP board! I
went back to give it a close look after
replying to your email, and find that I
was wrong.

Moving it now, and proceeding with my KRX3
installtion.


Thanks again!

73, Jeff  K8ND

> -----Original Message-----
> From: Jeff Maass [mailto:[hidden email]]
> Sent: Saturday, January 03, 2009 12:43 PM
> To: 'Ron D'Eau Claire'; '[hidden email]'
> Subject: RE: [Elecraft] KRX3 Install Problem: Extra Standoff,
> Front Panel Board
>
>
> G'day Ron:
>
> You misunderstand my situation.
>
> I *have* mounted the nylon standoff to the Main DSP board as
> you describe.
>
> My problem is that there was *already* a metal standoff
> mounted on the Front Panel board, in the hole that you
> mention as vacant, and on which the nylon standoff rests.
> That standoff was mounted at the time of original
> construction (not by me), and is shown in the photo for which
> a link was provided.
>
> So, when it came time to re-mount the Main DSP board to the
> Front Panel board, the new nylon standoff on the Main DSP
> board want to sit **on top of** the metal standoff on the
> Front Panel board (obviously not possible). You can see this
> in another photo at:
> http://www.k8nd.com/Duelling_Standoffs_3485.JPG
>
> One of the standoffs has to go. The only question I have is
> whether I can leave the metal standoff in place and remove
> the nylon standoff, or whether I need to disassemble the
> front panel assembly to take off the metal standoff.
>
>
> Thanks.
>
> 73,  Jeff  K8ND
>  
>
> > -----Original Message-----
> > From: Ron D'Eau Claire [mailto:[hidden email]]
> > Sent: Saturday, January 03, 2009 12:26 PM
> > To: [hidden email]; [hidden email]
> > Cc: 'W8TK Tom Kravec'
> > Subject: RE: [Elecraft] KRX3 Install Problem: Extra Standoff, Front
> > Panel Board
> >
> > You're looking at the wrong place, Jeff.
> >
> > Check Fig 9 in your KRX3 manual where it shows the screws
> to remove to
> > take the main DSP board off of the front panel board.
> Arrows point to
> > the three screws that thread into the standoffs on the front panel
> > board.
> >
> > Look to the LEFT of the lower left screw in that figure, and you'll
> > see an empty hole in the aux DSP board near the VFO B encoder. That
> > empty hole is where the nylon standoff goes on the aux DSP
> board, very
> > close to the VFO B encoder.
> >
> > The nylon standoff will rest against the front panel board
> just to the
> > *left* of the electrolytic caps on the left edge of the picture you
> > posted.
> >
> > There's actually a hole in the front panel board where the nylon
> > standoff rests, but it's not screwed onto the front panel
> board. It's
> > only function is to keep the main DSP board from being
> pushed forward
> > toward the front panel board when the connectors mate.
> >
> > Ron AC7AC
> >
> > -----Original Message-----
> >
> > I am in the middle of installing the KRX3 in my K3/100 (s/n
> 1152), and
> > have bumped into a "stopper".
> >
> > I am at the point of re-mounting the main DSP board to the
> front panel
> > board. I find that there is a metal standoff mounted on the front
> > panel board near
> > J31 which is in the place that the newly-mounted nylon
> standoff (same
> > length) is mounted on the Main DSP board. This standoff is
> attached to
> > the Main DSP board in the KRX3 instructions at the top of page 17.
> >
> >  http://www.k8nd.com/FrontPanelStandoff_3489.jpg
> >
> >
> > 73,
> >
> > Jeff  K8ND
> >  
> >
> >
>

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