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

Thu May 22 12:50:11 2003

Jerry:

In truth, the ground JUMPERS _are_ flush-mounted.

However, there are also a number of ground test points which require 
mounting a bit above the PC board. These are the 'jumpers' I think he was 
referring to, and they are certainly the ones to which _I_ was referring.

73,

Tom Hammond   N0SS

At 06:28 PM 5/21/03, you wrote:
>Gee, I must have missed that one somewhere, somehow. I've put all my ground
>jumpers right next to the board. OOPS.
>
>Jerry - NR5A
>----- Original Message -----
>From: "Don Brown" <[email protected]>
>To: "Bozidar Benc" <[email protected]>; "Elecraft" <[email protected]>
>Sent: Wednesday, May 21, 2003 6:42 AM
>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" <[email protected]>
> > To: "Elecraft" <[email protected]>
> > 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
> > >
> > _______________________________________________
> > Elecraft mailing list: [email protected]
> > You must be a list member to post to the list.
> > Postings must be plain text (no HTML or attachments).
> > See: http://mailman.qth.net/mailman/listinfo/elecraft
> > Elecraft Web Page: http://www.elecraft.com
> >
>
>_______________________________________________
>Elecraft mailing list: [email protected]
>You must be a list member to post to the list.
>Postings must be plain text (no HTML or attachments).
>See: http://mailman.qth.net/mailman/listinfo/elecraft
>Elecraft Web Page: http://www.elecraft.com