The project began by researching available keyer IC's
post 24 Dec 2021
Voice_Messages_Keyer Links →
Voice-keyer with VELLEMAN module K8030
FDMDV is the latest digital voice mode on HF - it caters to high quality digital voice under poor band conditions, in only 1100Hz bandwidth
Voice keyer
due connettori RCA, uno per il micrafono del transceiver e l'altro per il PTT
Voice keyer
First thing i did was learing how to control a microcontroller,added a LCD and the Rotry encoder and as last the ISD1700
Vocal Keyer
Build this stand-alone contesting accessory for your radio and conserve your voice
34
FDMDV is the latest digital voice mode on HF - it caters to high quality digital voice under poor band conditions, in only 1100Hz bandwidth
due connettori RCA, uno per il micrafono del transceiver e l'altro per il PTT
First thing i did was learing how to control a microcontroller,added a LCD and the Rotry encoder and as last the ISD1700
Build this stand-alone contesting accessory for your radio and conserve your voice