Saturday, August 26, 2017

Speech Processor and Antenna Tuner/SWR meter for BITX

Check out the blog of homebrew wizard K.P.S. Kang.   OM has a nice speech processor based on the LM386.   He also has a very simple antenna tuner and SWR bridge.  FB OM.


  1. I believe he uses a LM358 opamp. A LM386 would be very noisy in a speech processor.

  2. Will it be possible to share the PCB layout to scale if it has been prepared. Thanks I advance. VU3RHU, QTH - Mumbai

  3. Yes please share the pcb gerbers I wish to build this