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This is a test to see if JPG pictures come through in an email on the groups.io site.
Here is a spectrum display of the AM broadcast band at my QTH in Phoenix, AZ.
I get ADC overload on my Duo radio, even though there are no signals that are stronger than -10 dbm.
Here is the same spectrum using an AM band stop band (reject) notch filter:
ADC overload is gone. Using this band stop filter, I can listen to beacon signals in the 200 – 500 Khz band.
If the pictures do not come through, then please send me your email address and I can send them to you.
From: EladSDR@groups.io [mailto:EladSDR@groups.io] On Behalf Of Paul Jones
Sent: Thursday, March 19, 2020 3:15 AM
Subject: Re: [EladSDR] How do you like your pre-selector? #fdm-duo #pre-selector
I have requested a few months ago new filters to also cover the main broadcast bands that swl users can make use of.
Also a dedicated am 520-1800 notch filter