Ground jumpers (Was: RE: [Elecraft] Electronics & radio questions: Don't be shy--go ahead and ask!)

[Bozidar Benc]

Don,

Thanks a lot for the explanation. In my ignorance I thought that there might
be some "higher" reasons for those jumpers. :-))

73 Bole, 9A3RR


> -----Original Message-----
> From: Don Brown [mailto:DolfinDon@msn.com]
> Sent: Wednesday, May 21, 2003 2:42 PM
> To: Bozidar Benc; Elecraft
> Subject: Re: Ground jumpers (Was: RE: [Elecraft] Electronics & radio
> questions: Don't be shy--go ahead and ask!)
>
>
> Hi
>
> If Wayne doesn't mind I will answer this one. The ground jumpers are a
> convenient place to connect the ground for your meter or scope when making
> measurements or calibrating the radio. The 6 mm is not critical
> but must be
> high enough to get a clip lead on to the test point. I have
> worked on a few
> radios where the ground jumpers were so close to the board that it was
> impossible to use them. I also like to use the clipped leads from 1N4007
> diodes for the jumpers because they are larger and less fragile
> when used as
> a test point like this. It is the little things like this that shows the
> thought that went into the design of the K2 and K1.
>
> Don Brown
> KD5NDB
>
>
> ----- Original Message -----
> From: "Bozidar Benc" <benc@benc.hr>
> To: "Elecraft" <elecraft@mailman.qth.net>
> Sent: Wednesday, May 21, 2003 3:34 AM
> Subject: Ground jumpers (Was: RE: [Elecraft] Electronics & radio
> questions:
> Don't be shy--go ahead and ask!)
>
>
> > Wayne,
> >
> > Here is the first one. :-)
> >
> > I've built K1 and K2 with almost all options (my KAT100 didn't arrive
> yet).
> > Almost every PCB has two, or more, 6 mm high, "U" shaped ground jumpers.
> > All around those jumpers is ground so for DC they are not needed.
> >
> > My question is, why they are needed? Why they must be loops 6 mm high?
> > Is there anything special in their positions on PCBs?
> >
> > TiA
> >
> > Bole, 9A3RR
> >
>
>