[RFI] RFI Signature

[Jeff (W4DD)]

I think the antenna is a StepIR vertical.  It seems to have a narrow BW.

On Tue, Nov 25, 2025, 2:38 PM Jim Brown <jim at audiosystemsgroup.com> wrote:

> On 11/25/2025 10:00 AM, Jeff (W4DD) wrote:
> > Also uploaded the full 80M spectrum, 3500 to 4000.  Some slight banding
> is visible, -79 lvl @6KHz.
>
> Is there any sort of front end filtering engaged? If so, can it be
> disabled or bypassed? I'm trying to figure out how broadband the noise
> is. When I'm asking for a very wide spectrum, I'm thinking 10 MHz or more.
>
> 73, Jim K9YC
>
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