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turretslug · 13th Jan 2018, 12:30 pm

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.

13th Jan 2018, 12:30 pm	#14
turretslug Dekatron Join Date: Nov 2011 Location: Surrey, UK. Posts: 4,396	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.