[RFI] Bonding to a PC

[Jim Brown]

On 2/28/2019 11:34 AM, N4ZR wrote:
> I want to try to manage RFI in my shack, among other things, by 
> bonding all chassis together, including my shack computer, but the 
> question has come up - where can I find chassis ground on a PC without 
> serial or parallel ports?  Is there a design standard, such as 
> connecting the power supply chassis to ground buses on the 
> motherboard, that makes this easy or does it have to be figured out PC 
> by PC? 

Bonding should always be to the shielding enclosure (chassis) if there 
is one, and this is the required connection point for the Green wire. 
DB-connectors are sometimes bonded, so consider the VGA connector (if 
there is one). To make that connection to my laptops, I solder a short 
bonding conductor to a lug small enough to fit under the retaining screw 
for the DB connector, with a single Power Pole on the other end.

If your PC only has USB ports, try making the connection to the shell of 
one of them by sacrificing a USB cable like one of these.

https://www.amazon.com/Cable-Matters-USB-Black-Feet/dp/B00C7RXR72

USB is carried on twisted pairs, and cheap cables are often unshielded.  
If you're experiencing RFI, using shielded cables might help.

73, Jim K9YC