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@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*
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