[Elecraft] [KX3/PX3] Bonding

[Don Wilhelm]

Joel,

Good progress.
Yes, the roofing filter is not usable with the 8kHz shift engaged.  This 
is not a firmware problem, it is a hardware problem.  Think of it this 
way - the "IF" for the KX3 is at baseband (audio frequency range), and 
that is where the roofing filter works - in other words, it is an audio 
range filter, but installed at the IF rather than in the audio chain.  
When the 8kHz shift is engaged, the "IF" changes to 8kHz and that is too 
high for the audio range roofing filter.

On the bonding, you are on the right path.  Bond along the path of your 
audio cables or along the paths of the coax.

You imply that you have several ground rods driven.  Unless they are 
connected back to the house Utility Ground rod, you may have a safety 
issue on your hands.
All ground rods should be connected to the Utility Ground by #6 
(minimum) or #4 (preferred) copper wire.  See the Safety chapter in the 
later ARRL Handbooks.
A fault in the AC wiring of your home or green-wire grounded appliances 
can cause a significant potential difference between isolated grounds, 
perhaps even lethal.

73,
Don W3FPR



On 6/5/2016 8:03 AM, Joel Black wrote:
> Does RX SHFT still nullify the roofing filter or was that fixed in a F/W update?
>
>
> My KX3 antenna connection goes to a 4-way switch to switch between my OCF, NVIS, vertical, and dummy load. Does the KX3 need to be bonded to that as well? All of the feed lines run up through the wall, into the attic, and out a soffit vent to surge protectors attached to a ground rod. That ground rod is bonded to house ground. The OCF and the NVIS are on a fiberglass pole in the middle of the back yard. There is no ground rod there. The vertical is over to the side and is bonded to a ground rod there. That ground rod is not bonded but, from my reading, it should be.
>
> Does this look/sound right? Please be critical. I cannot learn unless you tell me where I screwed up. I have pretty thick skin. ;)
>
> 73,
> Joel - W4JBB
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