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.
http://smallwonderqrp.blogspot.com/2017/08/two-essential-add-ons-for-bitx-and.html
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.
http://smallwonderqrp.blogspot.com/2017/08/two-essential-add-ons-for-bitx-and.html
I believe he uses a LM358 opamp. A LM386 would be very noisy in a speech processor.
ReplyDeleteWill it be possible to share the PCB layout to scale if it has been prepared. Thanks I advance. VU3RHU, QTH - Mumbai
ReplyDeleteYes please share the pcb gerbers I wish to build this
ReplyDeleteGreat blog post, thanks for sharing
ReplyDelete