The circuit is small enough that it can be built into the microphone.Gain of whole circuit is about 18dB, compression ratio is set by R1 and can be varied from 1:1 to 15:1. The little PCB arrived back in mid May from, but has sat on the desk waiting for me to find the screw driver and have a go at the microphone.įT-817 Speech Compressor Ondřej Koloničný, OK1CDJįT-817 doesn't have any type of speech processing built-in.This audio speech compressor is designed with the Analog Devices SSM2165 device. I managed to find some time and confidence (i worry a little too much at my soldering ability some times) to have a crack at the FT817 Microphone speech compressor install.
As part of my efforts to improve the performance of my sota station, I have been focusing on the low hanging fruit of changes to help improve performance, better antenna, swapping the internal speaker, better filtering, the latest change is the audio out of the microphone!
