[Elecraft] KRX3 Issue - Jumper W4.... rtfm

[Ron D'Eau Claire]

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