EMI-LPF Filter for the headsets or microphones

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