KRX3 Issue - Jumper W4

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KRX3 Issue - Jumper W4

James Denneny
I could not get KRX3 or Main to RX after KRX3 install.  After checks and rechecks with Rene of Elecraft, we discovered the W4 jumper had not been removed.

Now here is the "gotcha".  Manual shows jumper across two pins of a connector.  I saw none and moved on.  My RF board is a Rev A.  The KBPF3 module mounts over the top of the RF board.  Guess what? The KBPF3 board covers the W4 jumper which is soldered to the RF board.  Cut the jumper and RX comes alive.  

I wish to thank Rene for his exemplary support.  He called me on a SUNDAY and spent hours on the phone sleuthing this problem.  Do you think K-I-Y would help you like that on Sunday?

Jim
K7EG
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Re: KRX3 Issue - Jumper W4.... rtfm

Bill Steffey NY9H
It IS in the instructions that our older boards had a wire which
needed to be cut....
and that jumper is indeed partially hidden by the bandpass board,

That jumper's location could be better identified in the instructions,
as I recall it is to the rear of that jumper block,  not in front of it .

It went in fine and does work great.... still calmly awaiting the
firmware to allow being able to split it off to another band.

bill




At 03:06 PM 8/24/2008, Jim Denneny wrote:

>I could not get KRX3 or Main to RX after KRX3 install.  After checks
>and rechecks with Rene of Elecraft, we discovered the W4 jumper had
>not been removed.
>
>Now here is the "gotcha".  Manual shows jumper across two pins of a
>connector.  I saw none and moved on.  My RF board is a Rev A.  The
>KBPF3 module mounts over the top of the RF board.  Guess what? The
>KBPF3 board covers the W4 jumper which is soldered to the RF
>board.  Cut the jumper and RX comes alive.
>
>I wish to thank Rene for his exemplary support.  He called me on a
>SUNDAY and spent hours on the phone sleuthing this problem.  Do you
>think K-I-Y would help you like that on Sunday?
>
>Jim
>K7EG
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com

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RE: KRX3 Issue - Jumper W4.... rtfm

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RE: KRX3 Issue - Jumper W4.... rtfm

Bill Steffey NY9H
nope,,,,,  the jumper      it is NOT between , as described in the manual ....

I sent this note to support :on July 16th,,,

the w4 jumper  is NOT between the w4 jumper block and the Kio boards,,,,,
  I kept looking to make certain i was looking at the w4
jumper....(which I was)

and you do need to take out the general coverage board to get access
to clip it ( w4)  cleanly...  it went right into   # 44
bill
--------
And since it was contradictory to the instructions in the manual
i rechecked it a zillion times ... checked the schemo... then cut w4

For  Ron I have attached a pix, which will get stripped by the
reflector for the crowd.
While there is a jumper located as described , W4 is just in front of
the connector.

bill





At 10:42 AM 8/25/2008, Ron D'Eau Claire wrote:

>Yep. The soldered jumper on the older boards is between the connector and
>the KIO3 board. There's an arrow and callout in Figure 39 in the KRX3 manual
>showing where it is.
>
>Early on Wayne moved it to a plug-in jumper in the connector because it was
>hard to get to the soldered jumper on the RF board. Besides, if one wanted
>to use the K3 with the KRX3 removed it's necessary to replace that jumper as
>described in the manual.
>
>Ron AC7AC
>
>-----Original Message-----
>
>It IS in the instructions that our older boards had a wire which
>needed to be cut....
>and that jumper is indeed partially hidden by the bandpass board,
>
>That jumper's location could be better identified in the instructions, as I
>recall it is to the rear of that jumper block,  not in front of it .
>
>It went in fine and does work great.... still calmly awaiting the
>firmware to allow being able to split it off to another band.
>
>bill
>
>
>
>At 03:06 PM 8/24/2008, Jim Denneny wrote:
> >I could not get KRX3 or Main to RX after KRX3 install.  After checks
> >and rechecks with Rene of Elecraft, we discovered the W4 jumper had not
> >been removed.
> >
> >Now here is the "gotcha".  Manual shows jumper across two pins of a
> >connector.  I saw none and moved on.  My RF board is a Rev A.  The
> >KBPF3 module mounts over the top of the RF board.  Guess what? The
> >KBPF3 board covers the W4 jumper which is soldered to the RF board.
> >Cut the jumper and RX comes alive.
> >
> >I wish to thank Rene for his exemplary support.  He called me on a
> >SUNDAY and spent hours on the phone sleuthing this problem.  Do you
> >think K-I-Y would help you like that on Sunday?
> >
> >Jim
> >K7EG
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com

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RE: KRX3 Issue - Jumper W4.... rtfm

AC7AC
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