[Elecraft] Control Board Question

Don Wilhelm w3fpr at earthlink.net
Wed Jun 6 21:06:52 EDT 2007


Mike,

Those jumpers go on the component side - they are handy clip-on points 
for the ground side of DMM and 'scope probes and such, so make these 
ones tall enough so you can accomplish that purpose.  Mount these two on 
the Control Board about 1/4 inch high because there are components 
almost directly below them which hinder that attachment of clip leads.

The manual does not say so, but if you are able, make them out of stout 
wire (16 gauge IIRC).  The cutoff leads of 1N4007 diodes work nicely. 
You might consider delaying the install of these grounding points until 
you do some work on the RF board which will then yield some of the 
1N4007 leads.

You will find 4 similar grounding loops on the RF board, and I advise 
you to make all of them from the 1N4007 diode leads, and make them tall 
enough so they are useful for connecting clip leads onto - some builders 
put the loop quite close to the board and if that is done, they are next 
to useless.

73,
Don W3FPR

Michael Casey wrote:
> 	
> 
> Hi All, 
> 
> I've just started building K2 # 6317 and I have a question about the Control
> Board.  On page 17 (Right column 4th down, Fig. 4-6) the manual says to
> solder 2 jumpers next to the ground symbols in the upper right and left hand
> corners.  It isn't clear to me if the jumpers should be placed on the
> component side of the board or the bottom side of the board.  It may not
> matter, but no sense finding out the hard way that it does.
> 
> Thanks,
> 
> Mike Casey
> KC9ORD
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