#1716 700Hz Center 200Hz Wide CW Audio Filter

While we one the subject of frequnecy... I was looking through your vidoe library , looking for detail on your rubidium stanrdard, but did not see anything on how it was built. Would love see an upated video and how one might be built today. BTW big fan of your channel.

I've build HI-PER-MITE and used it in a project of mine. Nice filter indeed.

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It looks okay. It'd be nice to hear it on a receiver.
Many years ago I bought a c.w. audio filter kit from Maplin for my h/b radio. It' works pretty well.
G4GHB.

The modern way to do this would be to use a very fast Arduino. Some have fast ADC and DAC systems on the chip and run at clock speeds of 600MHz. Then one could make a tunable filter with just two extra potentiometers.

No story time. 😢

I'm gonna need a "let's get this onto a tray...nice" at least once

So by my squinting this is a lumped bandpass made of three second-order lowpass filters, and a single second-order high-pass. The angles on the bode plot at least, match that speculation.

Sockets and chips. Is that anything like fish and chips?

I think just as informative as the bode plot, would be to get a function generator to sweep a sine wave from 200hz to 2khz over 10 seconds and listen to the output on a speaker.