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Re: Elecraft K3s, etc. bonding

Posted by NK7Z on Apr 23, 2020; 12:53pm
URL: http://elecraft.85.s1.nabble.com/Elecraft-K3s-etc-bonding-tp7659942p7660007.html

Hi Randy,

I rebuilt my shack six years ago, and documented a bit of that.  One
part was connecting grounds to the back of the rigs.  See:

https://www.nk7z.net/rebuilding-the-shack/

Look at a few of the photos.  One shows a large copper ring terminal,
which will fit a K3, etc., and how it was connected to 3/4 inch braid.

Basically I folded the braid, inserted it and some solder cut to length
into the ring terminal solder bucket.  I then held it in place with a
set of pliers, and hit the ring terminal with a Burns-O-Matic torch.
You can see the jig I had set up on the top of the glass jar.

Yes...  I know grounds are not supposed to be soldered...

I am sure there are better ways...  This is just what I did.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 4/23/20 5:37 AM, Randy Farmer wrote:

> I'm currently in the process of wiring up my new station and I happen to
> be working on the equipment bonding phase for my pair of K3s SO2R
> station. I'm doing my best to get decent connectivity between the
> station components, but can't really figure out how to terminate large
> (AWG 10) wire to the teeny 6-32 ground screws on the back of the K3,
> especially since something like six bond wires need to be attached to
> the transceivers. There appear to be no available ring terminals that
> will fit these small screws; the smallest I can find are for #10 studs.
> Even by using a threaded standoff installed in the K3 ground nut and a
> longer screw to stand the rings off, stacking a bunch of these huge
> terminals is extremely difficult. Providing some means of reasonably
> quick disconnect for servicing purposes is equally difficult. Exactly
> how can I go about connecting big wires to little ground posts?
>
> 73...
> Randy, W8FN
>
> On 4/20/2020 10:22 PM, Jim Brown wrote:
>> On 4/20/2020 6:08 PM, Tom Norris NB5Q wrote:
>>> I'm asking what method and
>>> attachment point, to each piece of equipment, you experienced K-Line
>>> owners
>>> use to bond the K3s, P3, SP3, etc. and then on to the station ground.
>>
>> I use wires soldered to screw lugs, making sure that the attachment
>> point is not insulated from the chassis by paint. Some of the
>> equipment has a dedicated grounding screw. Shells of DB connectors
>> SHOULD be bonded to the equipment chassis, but not always -- some mfrs
>> screw up and fail to do that.
>>
>> Some of my equipment goes out in the field from time to time, so I use
>> single circuit Power Pole connectors to make that easy. I'll use 2-6"
>> between the lug and the PowerPole, then make a loop soldered to a
>> PowerPoles that connect to each piece of gear in the string (so each
>> connector has two wires). There are lots of suitable variations on
>> this, depending on how the shack is laid out.
>>
>> These are the slides for my talks on station power, grounding, and
>> bonding. http://k9yc.com/GroundingAndAudio.pdf
>>
>> 73, Jim K9YC
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