7th Order LPF Boards

Ok, I have still been working at building stuff. Here is the latest piece of what will become a CW transmitter. These boards are 7th order Chebychev low pass filters.

This is the PCB as laid out in ecad. 4 boards per PCB and you can get 5 PCB from JLCpcb for $2 so that is 20 low pass filter boards. A life times supply.

My current project is a 40m CW transmitter, here is the LPF sitting on top of the TX/RX switch.

Filter response plotted with the NanoVNA.

If you want to have your own LPF boards made, here are the gerber files:  LPF_Singles

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