[RFI] RFI Signature

[David Eckhardt]

To state the obvious:  Even the absolute best bandpass filter will not
eliminate in-band RFI.

Dave - WØLEV

On Wed, Nov 26, 2025 at 12:16 AM Jim Brown <jim at audiosystemsgroup.com>
wrote:

> On 11/25/2025 11:46 AM, Jeff (W4DD) wrote:
> > I think the antenna is a StepIR vertical.  It seems to have a narrow BW.
>
> I wouldn't expect it to be narrow on receive.
>
> I'm not familiar with Flex rigs. Elecraft has very good RX bandpass
> filters on each band (or pairs of higher bands, and I would expect Flex
> to do the same.
>
> Do you hear the noise on on other bands?
>
> 73, Jim K9YC
>
>
>
>
>
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-- 

*Dave - WØLEV*