Hello Jim:
You are spot on. I have these installed at K3LR:
https://www.dxengineering.com/parts/dxe-bbgk-2-55-p
Stopped RFI - bonding around the rotor.
73
Tim K3LR
-----Original Message-----
From: RFI [mailto:rfi-bounces+k3lr=k3lr.com@contesting.com] On Behalf Of Jim
Brown
Sent: Tuesday, December 22, 2020 12:51 AM
To: rfi@contesting.com
Subject: Re: [RFI] QUESTION
On 12/21/2020 4:48 PM, Gary Johnson wrote:
> That’s easy. RF is picked up on the AC lines then enters any nonlinear device
> plugged into those lines, such as a walk wart. There, RF is rectified,
> harmonics are generated, and that’s mixed with all the garbage on the power
> line, then re-radiated via conducted emissions. Many harmonics are normally
> expected. This is the classic problem for any SO2R or M/M station.
>
> Case study: At 8P5A, Tom has very little ancillary stuff plugged in and yet
> he had your problem. He traced it to a single LED light. Once removed, the
> harmonic garbage disappeared.
Yes. W3LPL alerted many of us to this mechanism. Another place this
occurs is the in the junction inside rotators between the top and bottom
section. The cure is to bond around them.
73, Jim K9YC
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|