Hello everyone. Here is my another project for headsets or microphones. It’s an EMI-LPF filter.

It’s a complete and finish device which you can use to protect your microphone against the EMI. There is a simple circuit for the EMI filtering and also has a LPF (Low Pass Filter) which rejects all frequencies below 300 Hz.
You can make it or buy in my ebay store
Thanks.
73’s,
Alex K6VHF
Hi Alex K6VHF,
This project is no longer available on ebay. Can you inform the value of the components?
73,
Fernando – PU2PLL