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Old 13th Jan 2018, 12:30 pm   #14
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 2,672
Default Re: Ultra VLF signals?

Maybe the 72kHz burble, too. I suspect that a credible VLF receiver (of any topology) needs an effective LPF on its input to keep the powerful higher frequency stuff at bay.
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