Trying to understand this noise
It has appeared somewhat recently across this band. I have a galvanic isolator which seems to cut some of it out, however I cant seem to isolate it I have swapped out my power supplies and made no difference. I have my Kiwi in an earthed metal box so I am convinced its coming in off the antenna. I'm using an LNA inline with the antenna however when I remove it and have just the antenna in the Kiwi, the noise exists. Ive also swapped out the coax incase water had got in somewhere.
Given the location of where I am - in an urban enviroment - its unlikely to get any better. Attached is the noise with the noise suppression on, then off.
I think I will need to go back to an active loop antenna, but a decent quality one this time, not the MLA30+ I'm looking at the https://bonito.net/mega-loop-fx/ but damn, its expensive.
Comments
Don't buy the Bonito loop.
Have a look at the Loop Antennas IO group.
https://groups.io/g/loopantennas
You will find some familiar names on there, and one or two, are offering ready built loop amplifier PCB's based on Wellbrook and LZ1AQ's designs.
My personal favourites are versions of the LZ1AQ loop amplifier. But for a bit more money, you could buy a much more versatile ready built LZ1AQ active antenna amplifier, that facilitates both switched active loop and dipole modes. This is highly effective and still costs a fraction of the Bonito (which is based around a cheap video amplifier chip).
https://active-antenna.eu/
Chavdar's other webpages are a goldmine of information and highly recommended too.
https://www.lz1aq.signacor.com/docs/lz1aq-topical-article-index.php
I hope this provides some alternative options.
Martin
Ah this is why I posted here - thanks, Martin! :-)